Pennisetum alopecuroides cultivation method

Abstract

The invention relates to the technical field of forage grass cultivation and planting. The pennisetum alopecuroides cultivation method comprises the steps of soil preparation, fertilization and strong seedling cultivation, and in the strong seedling cultivation stage, the daily minimum temperature of the growth environment is controlled to be 7-10 DEG C or above. According to the embodiment of the invention, the daily minimum temperature of the growth environment is controlled to be 7-10 DEG C or above in the strong seedling cultivation stage, so that the seedling emergence growth / seedling growth of the seed section is rapid, the tillering is rapid and more, the tillering number of the seed section / seedling is effectively increased, the seedling emergence is thick and strong, the strong seedling cultivation is realized, the yield is increased, and a solid foundation is laid for obtaining high yield.

Description

Technical Field

[0001] The present application relates to the technical field of forage planting, for example, to a method for cultivating Pennisetum truncatum. Background Art

[0002] Hybrid Pennisetum, Elephant Grass, and American Pennisetum are perennial forage grasses of the genus Pennisetum. They grow rapidly, have tall plants, a large number of leaves, strong tillering ability, good regeneration, high grass yield, and excellent quality. They have been widely studied and promoted as a high-yield and high-quality forage grass.

[0003] Pennisetum forage grasses such as hybrid Pennisetum, elephant grass, and American Pennisetum are warm-season perennial forage grasses, mostly distributed in tropical or subtropical regions. They are widely promoted and produced in areas with higher temperatures in southern my country. In cold regions (e.g., southern mountainous areas, northern regions, and high-altitude areas), they grow slowly, tiller slowly and less, and emerge weakly, making it difficult to cultivate strong seedlings and increase production, resulting in the inability to promote hybrid Pennisetum, elephant grass, American Pennisetum, and other Pennisetum forage grasses in cold regions. Therefore, in order to successfully promote this type of high-stalked and high-yield forage grass in cold regions, it is urgent to provide a method for cultivating Pennisetum such as hybrid Pennisetum, elephant grass, and American Pennisetum. Summary of the invention

[0004] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0005] The disclosed embodiments provide a method for cultivating Pennisetum to solve the problem that hybrid Pennisetum, elephant grass, American Pennisetum and other Pennisetum are difficult to promote and plant in cold regions, and achieve strong seedling cultivation and high yield of Pennisetum in cold regions.

[0006] In some embodiments, the Pennisetum cultivation method comprises land preparation, fertilization and seedling cultivation, wherein during the seedling cultivation stage, the daily minimum temperature of the growth environment is controlled to be 7-10°C or above.

[0007] The Pennisetum cultivation method provided in the embodiments of the present disclosure can achieve the following technical effects:

[0008] The method for cultivating Pennisetum in the disclosed embodiment controls the daily minimum temperature of the growth environment to 7-10°C or above during the seedling cultivation stage, so that the seed nodes emerge and grow / seedlings grow rapidly, tillering is fast and abundant, the number of tillers of the seed nodes is effectively increased, the seedlings emerge strong, and the cultivation of strong seedlings is achieved, which is beneficial to increasing production, thereby laying a solid foundation for achieving high yields.

[0009] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0011] Figure 1 It is a flowchart of a method for cultivating Pennisetum provided by an embodiment of the present disclosure;

[0012] Figure 2 It is a flowchart of a Pennisetum cultivation method of Example 1 of the disclosed embodiments;

[0013] Figure 3 It is a flowchart of a method for cultivating Pennisetum truncatum according to Example 2 of the disclosed embodiments. DETAILED DESCRIPTION

[0014] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0015] Unless otherwise stated, the term "plurality" means two or more.

[0016] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0017] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0018] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0019] Combination Figure 1 As shown, the embodiment of the present disclosure provides a method for cultivating Pennisetum, comprising the following steps:

[0020] S10, land preparation and fertilization: In this step S10, the preparatory work before seedling cultivation, such as land preparation and fertilization, is not limited and conventional methods can be used.

[0021] S20, cultivating strong seedlings; wherein, during the stage of cultivating strong seedlings, the minimum daily temperature (i.e. the minimum nighttime temperature) of the growth environment is controlled to be 7-10°C or above.

[0022] The method for cultivating Pennisetum in the disclosed embodiment controls the daily minimum temperature of the seedling raising environment to 7-10°C or above during the seedling raising stage, so that the seed nodes emerge and grow rapidly, the tillers are fast and numerous, the tillering number of the seed nodes is effectively increased, the seedlings emerge strong, and the cultivation of strong seedlings is achieved, which is beneficial to increasing production, thereby laying a solid foundation for achieving high yields.

[0023] The method for cultivating Pennisetum of the disclosed embodiment is applicable to areas where the daily minimum temperature of the natural environment during the seedling period of Pennisetum is below 7-10°C. The specific time of the seedling period of Pennisetum is not limited and is determined according to the specific conditions of the area. For example, in cold areas, the seedling period of Pennisetum can be early spring or around April. For another example, in warm areas, the seedling period of Pennisetum can be early spring or winter. The daily minimum temperature during the seedling period of these Pennisetums is generally below 7-10°C. The low daily minimum temperature affects the cultivation of strong Pennisetum seedlings, which in turn affects the yield.

[0024] In the disclosed embodiment, the Pennisetum includes Pennisetum forage grasses such as hybrid Pennisetum, elephant grass (purple Pennisetum) and American Pennisetum.

[0025] In the disclosed embodiments, it can be understood that there are two situations for strong seedling cultivation. (1) In the case of seedling cultivation in the seedling bed and then transplanting to the field (i.e., seedling (seedling) transplanting), the strong seedling cultivation includes two stages, the strong seedling cultivation stage from the seedling stage to the seedling stage in the seedling bed and the strong seedling cultivation stage in the seedling stage after transplanting to the field. (2) In the case of direct planting in the field, there is only one stage for strong seedling cultivation, i.e., the strong seedling cultivation stage from the seedling stage to the seedling stage. It's just that this stage is longer than the strong seedling cultivation stage from the seedling stage to the seedling stage in the seedling bed, but shorter than the total duration of the two strong seedling cultivation stages in the case of seedling cultivation in the seedling bed and then transplanting to the field.

[0026] In some embodiments, in step S20, during the seedling cultivation stage, the maximum daily temperature of the growth environment (i.e., the maximum daytime temperature) is controlled to be 28-32° C. In this embodiment, by controlling the maximum daily temperature of the seedling cultivation growth environment, the node emergence growth (or seedling growth) is further promoted, the tillering number is increased, and the seedlings are more robust.

[0027] In some embodiments, in step S20, during the seedling cultivation stage, the bud position of the seed node is buried in the soil at a depth of 5 to 15 cm. Optionally, the bud position of the seed node is buried in the soil at a depth of 10 cm.

[0028] In the disclosed embodiment, the seedling cultivation stage may be carried out in a seedbed of a special nursery (or nursery), and the seedling cultivation may also be carried out in a field planting area. In the disclosed embodiment, the method of carrying out seedling cultivation in a field planting area includes seedling cultivation for field transplanting and seedling cultivation for direct planting in the field.

[0029] That is, strong seedling cultivation includes strong seedling cultivation in seedbeds and strong seedling cultivation for field planting. Strong seedling cultivation for field planting includes strong seedling cultivation for field seedling transplanting and strong seedling cultivation for field seed festival direct planting.

[0030] In the disclosed embodiments, the seedling density in the seedling cultivation stage is determined according to different seedling cultivation methods.

[0031] In some embodiments, in the seedling cultivation stage of step S20, when the seedling cultivation includes seedling cultivation in a seedbed, the seedling density is controlled to be 100 to 600 plants / m 2 While ensuring the amount of seedlings, promote the emergence and separation of seedlings and improve the rate of strong seedlings. Optionally, the seedling density is controlled to 200-500 plants / m 2 Optionally, the seedling density is controlled to 400 plants / m 2 Of course, the seedling density can be 100 to 600 plants / m 2 Any value in the range.

[0032] In some embodiments, when the strong seedling cultivation includes the strong seedling cultivation for field planting, in the strong seedling cultivation for field planting, the planting density is controlled to be 600 to 3000 plants (nests) / mu. While ensuring the basic amount of seedlings, the number of seedlings at the node is promoted to improve the strong seedling rate. Optionally, the planting density is controlled to be 800 to 2500 plants (nests) / mu. Optionally, the planting density is controlled to be 1000 to 2000 plants (nests) / mu. Optionally, the planting density is controlled to be 1200 to 1800 plants (nests) / mu. Optionally, the planting density is controlled to be 1500 plants (nests) / mu.

[0033] In some embodiments, strong seedling cultivation includes strong seedling cultivation in seedbeds; step S20, in the strong seedling cultivation stage, controlling the daily minimum temperature of the growth environment to be 7-10°C or above, specifically comprising: in the strong seedling cultivation stage of seedbeds, when the daily minimum temperature of the natural environment of seedling cultivation is lower than 7-10°C, the seed nodes are enclosed by one or more combinations of greenhouses, arch sheds and ground films, and the daily minimum temperature of the growth environment for strong seedling cultivation is controlled to be 7-10°C or above. In this embodiment, the arch shed is a miniaturized greenhouse. Ground film, as the name implies, is a thin film laid close to the ground.

[0034] In this embodiment, there are seven types of enclosure methods in the seedbed seedling cultivation stage: greenhouse; arch shed; ground film; combination of greenhouse and arch shed; combination of greenhouse and ground film; combination of arch shed and ground film; combination of greenhouse, arch shed and ground film. The specific enclosure method is determined according to the daily minimum temperature of the natural environment for seedling cultivation.

[0035] Optionally, when the daily minimum temperature of the natural environment for seedling cultivation is 4-10°C, the enclosure method includes greenhouse, arch shed or ground film to ensure that the daily minimum temperature of the growth environment for seedling cultivation is 7-10°C or above.

[0036] In a practical application, when the daily minimum temperature of the natural environment for seedling cultivation is 4-10°C, cutting seedlings are grown in a greenhouse (e.g., a film greenhouse), and the seedling density can be 100-600 plants / m 2 The maximum temperature in the greenhouse can be adjusted by opening and closing the middle and side seams of the greenhouse.

[0037] In another practical application, when the daily minimum temperature of the natural environment for seedling cultivation is 4-10℃, the seedlings are covered with white mulch after the cutting nodes in the seedbed and the edge of the mulch is pressed firmly with soil around it. The seedling density can be 100-600 plants / m 2 When the daily minimum temperature of the natural environment for seedling cultivation is stable above 10℃ or when transplanting, uncover the mulch film. The maximum temperature of the mulch film enclosure method is difficult to control and is mostly used in areas with more cloudy days.

[0038] In another practical application, when the daily minimum temperature of the natural environment for seedling cultivation is 4-10℃, after the cuttings are planted in the seedbed, brackets (for example, fiberglass rods or bamboo pieces, etc.) are inserted on both sides of each compartment, covered with a light-transmitting film and the edge film is pressed firmly with soil around to form an arch shed enclosure. When the temperature in the arch shed is too high, such as exceeding 32℃, the film at both ends of the arch shed can be uncovered and sealed when the temperature in the shed drops to 25℃. The seedling density is 100-600 plants / m 2 .

[0039] Optionally, when the daily minimum temperature of the natural environment for seedling cultivation is 0-4°C, the enclosure methods include a combination of ground film and arch shed, a combination of ground film and greenhouse, and a combination of arch shed and greenhouse, so as to ensure that the daily minimum temperature of the growth environment for seedling cultivation is 7-10°C or above.

[0040] In a practical application, when the daily minimum temperature of the natural environment for seedling cultivation is 0-4℃, cover the seedbed with white mulch after the cutting node and press the edge of the mulch with soil on all sides; then insert brackets (for example, fiberglass rods or bamboo strips, etc.) on both sides of each compartment, cover with a light-transmitting film and press the edge of the mulch with soil on all sides. When the daily minimum temperature of the natural environment for seedling cultivation is stable at above 4℃, uncover the mulch according to the seedling condition or when transplanting. When the temperature in the arch shed is too high, such as exceeding 32℃, the films at both ends of the arch shed can be uncovered and sealed when the temperature in the shed drops to 25℃. Control the seedling density at 100-600 plants / m2 That is, an arch shed is built outside the ground film to ensure that the daily minimum temperature of the seedling environment is 7-10℃ or above. This method is mostly used in areas with more cloudy days.

[0041] In another practical application, when the daily minimum temperature of the natural environment for seedling cultivation is 0-4°C, cutting seedlings are grown in a greenhouse (e.g., a film greenhouse), and white ground film is covered after the cutting node and the edge film is pressed firmly with soil on all sides. The maximum temperature in the greenhouse can be adjusted by opening and closing the middle and side seams of the greenhouse. When the daily minimum temperature of the natural environment for seedling cultivation is stable at above 4°C, the ground film is uncovered depending on the seedling condition or when transplanting. The seedling density can be 100-600 plants / m 2 That is, while the seedlings are being grown in the greenhouse, the ground film is covered to ensure that the minimum daily temperature of the growth environment for the seedlings is 7-10℃ or above.

[0042] In another practical application, when the daily minimum temperature of the natural environment for seedling cultivation is 0-4°C, cutting seedlings are grown in a greenhouse (e.g., a film greenhouse), and then supports (e.g., glass fiber rods or bamboo pieces, etc.) are inserted on both sides of each compartment, covered with a light-transmitting film and the film is pressed firmly with soil on all sides. The maximum temperature in the greenhouse can be adjusted by opening and closing the middle and side seams of the greenhouse. The seedling density is controlled at 100-600 plants / m 2 That is, while raising seedlings by cuttings in the greenhouse, an arch shed is added to ensure that the daily minimum temperature of the growth environment for the cultivation of strong seedlings is 7-10℃ or above.

[0043] Optionally, when the daily minimum temperature of the natural environment for raising seedlings is below 0°C, the enclosure method includes a combination of ground film, arch shed and greenhouse. To ensure that the daily minimum temperature of the seedling raising environment is 7 to 10°C or above. For example, when the daily minimum temperature of the natural environment for raising seedlings is -5 to 0°C.

[0044] In a practical application, when the daily minimum temperature of the natural environment for seedling cultivation is -5 to 0°C, cuttings are carried out in a greenhouse (for example, a film greenhouse), and white ground film is covered after the cutting node, and the edges of the film are pressed firmly with soil on all sides; then, brackets (for example, fiberglass rods or bamboo strips, etc.) are inserted on both sides of each compartment, covered with a light-transmitting film, and the edges of the film are pressed firmly with soil on all sides; when the daily minimum temperature of the natural environment is stabilized at above 0°C, the ground film is uncovered depending on the seedling condition or when transplanting. The maximum temperature in the greenhouse can be adjusted by opening and closing the middle and side seams of the greenhouse. Control the seedling density at 100-600 plants / m 2 That is, while raising seedlings by cutting in the greenhouse, additional ground film and arch shed are added to ensure that the daily minimum temperature of the growth environment for strong seedling cultivation is 7-10℃ or above.

[0045] In some embodiments, the strong seedling cultivation includes the strong seedling cultivation for field planting; in step S20, in the strong seedling cultivation stage, the daily minimum temperature of the growth environment is controlled to be 7-10°C or above, including: in the strong seedling cultivation for field planting, when the daily minimum temperature of the natural environment of the field is lower than 7-10°C, the seed nodes or seedlings are enclosed by one or more combinations of greenhouses, arch sheds and ground films, and the daily minimum temperature of the growth environment for strong seedling cultivation is controlled to be 7-10°C or above. Basically the same as the enclosure method of the strong seedling cultivation in the seedbed seedling cultivation mentioned above.

[0046] In this embodiment, there are seven types of enclosure methods during the field planting growth stage: greenhouse; arch shed; ground film; combination of greenhouse and arch shed; combination of greenhouse and ground film; combination of arch shed and ground film; combination of greenhouse, arch shed and ground film. The specific enclosure method is determined according to the daily minimum temperature of the natural environment for field growth.

[0047] Optionally, when the daily minimum temperature of the natural environment for field growth is 4-10°C, the enclosure method includes greenhouses, arch sheds or mulch films to ensure that the daily minimum temperature of the growth environment for seedling cultivation is 7-10°C or above.

[0048] In a practical application, when the daily minimum temperature of the natural environment for field growth is 4-10°C, seedlings are transplanted or directly planted in a greenhouse (e.g., a film greenhouse) in the field planting area. The maximum temperature in the greenhouse can be adjusted by opening and closing the middle and side seams of the greenhouse. The planting density can be 600-3000 plants (nests) / mu.

[0049] In another practical application, when the daily minimum temperature of the natural environment of field growth is 4-10℃, cover the field planting land with black mulch and press the edge of the mulch with soil around it, make holes according to the corresponding specifications, and then transplant the seedlings or plant directly at the seeding node. Alternatively, when planting directly at the seeding node, a relatively thin mulch can be used without making holes, and the seedlings can be planted first and then covered with the mulch, because the seed buds can penetrate the mulch and germinate. The planting density is 600-3000 plants (nests) / mu.

[0050] In another practical application, when the daily minimum temperature of the natural environment for field growth is 4-10°C, the seedlings are transplanted or directly planted in the field planting field. After the festival, the brackets (for example, glass fiber rods or bamboo pieces, etc.) are inserted on both sides of each compartment, covered with a light-transmitting film and the edge film is pressed firmly with soil around. The planting density is 600-3000 plants (nests) / mu. When the temperature in the arch shed is too high, such as exceeding 32°C, the film at both ends of the arch shed can be uncovered and sealed when the temperature in the shed drops to 25°C. And when the daily minimum temperature of the natural environment for growth is stable above 10°C, the arch shed can be removed according to the seedling conditions.

[0051] Optionally, when the daily minimum temperature of the natural environment for field growth is 0-4°C, the enclosure methods include a combination of ground film and arch shed, a combination of ground film and greenhouse, and a combination of arch shed and greenhouse, so as to ensure that the daily minimum temperature of the growth environment for seedling cultivation is 7-10°C or above.

[0052] In a practical application, when the daily minimum temperature of the natural growth environment is 0-4°C, cover the field planting land with black mulch and press the edge film firmly with soil around it, then make holes according to the corresponding specifications, and then transplant the seedlings or plant directly at the planting node, or, when planting directly at the planting node, use a relatively thin mulch without holes, plant first and then cover the film; then insert brackets (for example, fiberglass rods or bamboo pieces, etc.) on both sides of each compartment, cover the light-transmitting film and press the edge film firmly with soil around it, and remove the arch shed according to the seedling situation when the daily minimum temperature of the natural growth environment is stable at above 4°C. When the temperature in the arch shed is too high, such as exceeding 32°C, the films at both ends of the arch shed can be uncovered and sealed when the temperature in the shed drops to 25°C. Control the planting density to 600-3000 plants (nests) / mu. That is, set up an arch shed outside the mulch to ensure that the daily minimum temperature of the growth environment for cultivating strong seedlings is 7-10°C or above.

[0053] In another practical application, when the daily minimum temperature of the natural growth environment is 0-4°C, the planting ground in the greenhouse (for example, a film greenhouse) is covered with a black ground film and the edge film is pressed firmly with soil on all sides, and then holes are made according to the corresponding specifications, and then the seedlings are transplanted or directly planted at the node. Alternatively, when directly planting at the node, a relatively thin ground film can be selected without holes, and the film is covered after planting. The maximum temperature in the greenhouse can be adjusted by opening and closing the middle and side seams of the greenhouse. The planting density is 600-3000 plants (nests) / acre. That is, the ground film is covered while the seedlings are transplanted or directly planted at the node in the greenhouse to ensure that the daily minimum temperature of the growth environment for cultivating strong seedlings is 7-10°C or above.

[0054] In another practical application, when the daily minimum temperature of the natural growth environment is 0-4°C, the seedlings are transplanted or planted directly after the planting festival in the greenhouse (for example, a film greenhouse), and then brackets (for example, fiberglass rods or bamboo pieces, etc.) are inserted on both sides of each compartment, covered with a light-transmitting film and the edge film is pressed firmly with soil on all sides. The highest temperature in the greenhouse can be adjusted by opening and closing the middle and side seams of the greenhouse. When the daily minimum temperature of the natural growth environment is stabilized at above 4°C, the arch shed is removed depending on the seedling condition. The planting density is controlled at 600-3000 plants (nests) / mu. That is, while the seedlings are transplanted or planted directly after the planting festival in the greenhouse, an arch shed is added to ensure that the daily minimum temperature of the growth environment for cultivating strong seedlings is 7-10°C or above.

[0055] Optionally, when the daily minimum temperature of the natural environment for field growth is below 0°C, the enclosure method includes a combination of ground film, arch shed and greenhouse. To ensure that the daily minimum temperature of the growth environment is 7-10°C or above. For example, when the daily minimum temperature of the natural environment in the field during the seedling cultivation stage is -5-0°C.

[0056] In a practical application, when the daily minimum temperature of the natural environment for field growth is -5 to 0°C, after covering the planting ground in the greenhouse (for example, a film greenhouse) with black mulch and pressing the edge film firmly with soil on all sides, holes are made according to the corresponding specifications, and then the seedlings are transplanted or directly planted at the seeding node. Alternatively, when directly planting at the seeding node, a relatively thin mulch can be selected without holes, and the film is covered after planting first; then, brackets (for example, glass fiber rods or bamboo pieces, etc.) are inserted on both sides of each compartment, and the light-transmitting film is covered and the edge film is pressed firmly with soil on all sides; when the daily minimum temperature of the natural environment is stable above 0°C, the arch shed is removed according to the seedling condition. The maximum temperature in the shed can be adjusted by opening and closing the middle and side seams of the greenhouse. The planting density is controlled to be 600 to 3000 plants (nests) / mu. That is, while transplanting seedlings or planting directly at the seeding node in the greenhouse, mulch and arch shed are added to ensure that the daily minimum temperature of the growth environment is 7 to 10°C or above.

[0057] In some embodiments, the Pennisetum cultivation method further includes (rapid) growth in field planting; during the rapid growth stage of field planting, the daily minimum temperature of the growth environment must also be ensured to be 7-10° C. or above. The field planting growth of step S30 of this embodiment is the growth stage after completing the seedling cultivation stage of step S20 (for example, the seedling cultivation stage of field seedlings, or the seedling cultivation stage of direct field planting).

[0058] In some embodiments, in the middle and late stages of the (rapid) growth of field planting, after the Pennisetum plants meet the preset conditions, two gibberellin spray treatments are performed, and the interval between the two gibberellin spray treatments is 8 to 15 days. Gibberellin promotes the growth of Pennisetum, increases the plant height at harvest, and thus increases the yield.

[0059] Optionally, the preset conditions include: the height of the Pennisetum plant reaches 1.5-2.5m; or the number of tillers of the Pennisetum plant reaches a preset number; or 30-40 days before the harvest of the Pennisetum; or the 60th day of planting. That is, when the Pennisetum plant meets one of the above conditions, the first gibberellin spray is started, and then the second gibberellin spray is sprayed after an interval of 8-15 days to promote the growth of the Pennisetum, increase the plant height, and thus increase the yield.

[0060] Optionally, the interval between two gibberellin spray treatments is 8 to 12 days. Optionally, the interval between two gibberellin spray treatments is 10 days.

[0061] The concentration of the gibberellin spray in this embodiment is not limited. Optionally, the concentration of the gibberellin spray is 50 to 200 ppm. Optionally, the concentration of the gibberellin spray is 60 to 150 ppm. Optionally, the concentration of the gibberellin spray is 80 to 120 ppm. Optionally, the concentration of the gibberellin spray is 100 ppm.

[0062] In some embodiments, when a greenhouse enclosure is used, a temperature control system may be provided in the greenhouse to control the temperature in the greenhouse so that the daily minimum temperature in the greenhouse is controlled at 7-10° C. or above.

[0063] Optionally, the temperature control system includes a heating device and a temperature monitoring device, the heating device is used to heat the inside of the greenhouse; the temperature monitoring device is used to monitor the temperature inside the greenhouse so that when the temperature inside the greenhouse does not meet the preset conditions, the heating device can be used for heating in time.

[0064] Specifically, the heating device includes an air heater. The temperature monitoring device includes a thermostat, and the temperature sensing probe of the thermostat is arranged in the greenhouse to sense the temperature in the greenhouse. The control end of the thermostat is electrically connected to the power supply end of the heating device; when the sensed temperature obtained by the thermostat is less than the preset temperature, the power supply end of the heating device is controlled to be turned on, and the heating device starts heating. It can be understood that when the sensed temperature obtained by the thermostat is equal to the preset temperature, the power supply end of the heating device is controlled to be disconnected, and the heating device stops heating. In this embodiment, the preset temperature is any value within 7 to 10°C, and the specific preset temperature is determined based on the actual seedling or planting growth conditions and energy consumption cost considerations. For example, the preset temperature is 7°C, 8°C, 9°C and 10°C, etc.

[0065] The following provides specific examples to more specifically illustrate the Pennisetum cultivation method of the disclosed embodiments.

[0066] Example 1

[0067] like Figure 2 As shown, a method for cultivating Pennisetum truncatum comprises the following steps:

[0068] S31, land preparation and fertilization. Conventional treatment is adopted.

[0069] S32, planting the seed nodes in the seedbed of the nursery ground for seedling cultivation, controlling the daily minimum temperature of the seedling cultivation growth environment to be 7-10°C or above, and cultivating the seedlings. During the seedling cultivation stage, conventional field management is performed.

[0070] S33, transplant the seedlings to the field planting site, and in the early stage of transplanting, cultivate the seedlings in the field planting site, and control the daily minimum temperature of the seedling cultivation growth environment of the planting site to 7-10°C or above to ensure that the seedlings can be cultivated in the seedling stage after transplanting. During this growth stage, carry out routine field management.

[0071] S34, 60 days (two months) after the seedlings are planted in the field in step S33, i.e., in the middle and late stages of rapid growth, the first gibberellin spray is applied, and the second gibberellin spray is applied 10 days later. The concentration of the gibberellin spray is 50-200 ppm.

[0072] In this embodiment 1, according to the temperature of the natural environment of the nursery ground, one or more combinations of greenhouses, arch sheds and ground films are selected to enclose the seed nodes, and the daily minimum temperature of the growth environment for the cultivation of strong seedlings is controlled to be 7-10°C or above. The specific enclosing method refers to the above-mentioned related embodiments.

[0073] Example 2

[0074] like Figure 3 As shown, a method for cultivating Pennisetum truncatum comprises the following steps:

[0075] S41, land preparation and fertilization. Conventional treatment is adopted.

[0076] S42, planting the seed nodes in the field for seedling cultivation, controlling the daily minimum temperature of the growth environment to be 7-10°C or above, and cultivating the seedlings to obtain seedlings. During the seedling cultivation stage, conventional field management is performed.

[0077] S43. Perform field management on the seedlings and enter the growth stage. At the beginning of this growth stage, if the natural environment temperature is still below 7-10°C, maintain the enclosure method to ensure that the daily minimum temperature of the planting growth environment is 7-10°C or above. During this growth stage, perform routine field management.

[0078] S44, 60 days (two months) after the seedlings in step S43 enter the growth stage, that is, in the middle and late stages of rapid growth, spray the first gibberellin spray, and spray the second gibberellin spray after an interval of 10 days. The concentration of the gibberellin spray is 50-200 ppm.

[0079] In this embodiment 2, in step S42, taking hybrid Pennisetum as an example, when the daily maximum temperature of the growth environment for seedling cultivation is 28°C (daily maximum temperature error ±1°C), the daily minimum temperatures of the growth environment are 1°C, 4°C, 7°C, 10°C and 13°C, respectively, and 5 treatment tests are carried out (daily minimum temperature error ±0.5°C). Among them, each treatment test is repeated 3 times (Ⅰ, Ⅱ, Ⅲ). Each repetition has 10 plants, and each plant is a seed node that has sprouted; the burial depth is 10 cm. Conventional field management. Treatment for 1 month. At the end of the test, the number of tillers of each plant is observed and the cumulative statistics of 10 plants are performed. The results are shown in Table 1.

[0080] In addition, when the daily maximum temperature of the seedling cultivation growth environment was 32°C (the daily maximum temperature error was ±1°C), five treatment tests were conducted with the daily minimum temperatures of the growth environment being 1°C, 4°C, 7°C, 10°C and 13°C (the daily minimum temperature error was ±0.5°C). The treatment tests were the same as above. The results are shown in Table 1.

[0081] Table 1

[0082]

[0083] As can be seen from Table 1, (1) for the tillering of hybrid Pennisetum, the minimum temperature of 7-10℃ is a critical threshold, especially 10℃. When it is below this threshold, the number of tillers is very small, while when it is equal to or above this threshold, the number of tillers is normal, and the number of tillers is relatively large. (2) When the daily minimum temperature is 7-10℃ or above, the number of tillers at the maximum temperature of 32℃ is significantly higher than that at 28℃, indicating that the maximum temperature only works when the daily minimum temperature is 7-10℃ or above.

[0084] In this embodiment 2, in step S42, the following test is also conducted: taking hybrid Pennisetum as an example, 5 test treatments with daily minimum temperatures of 1°C, 4°C, 7°C, 10°C, and 13°C are set at a daily maximum temperature of 28°C; and 5 identical test treatments with daily minimum temperatures of 1°C, 4°C, 7°C, 10°C, and 13°C are set at a daily maximum temperature of 32°C. Each test treatment has 3 replicates (Ⅰ, Ⅱ, Ⅲ). Each replicate has 10 plants. Each plant is a seed node that has sprouted. The burial depth is 10 cm, and conventional field management is performed. The treatment lasts for 1 month. At the end of the test, the height of each plant is measured and the average plant height of the 10 plants is calculated. The results are shown in Table 2.

[0085] Table 2

[0086]

[0087]

[0088] As can be seen from Table 2, (1) for the growth of hybrid Pennisetum, the daily minimum temperature of 7-10℃ is also a key threshold. When it is below this threshold, its growth rate is very slow, while when it is equal to or above this threshold, its growth rate is normal and relatively fast. (2) When the daily minimum temperature is 7-10℃ or above, the growth rate of the maximum temperature of 32℃ is also higher than that of 28℃, indicating that the maximum temperature only works when the daily minimum temperature is 7-10℃ or above.

[0089] From the above two test results (Table 1, Table 2), it can be concluded that although hybrid Pennisetum can survive at a minimum temperature of 1-4°C, in order to obtain strong seedlings, that is, rapid tillering and growth, the daily minimum temperature must be 7-10°C or above.

[0090] In this embodiment 2, for step S44, 4 test treatments were set: (1) clean water as control; (2) gibberellin spray concentration of 50ppm; (3) gibberellin spray concentration of 100ppm; (4) gibberellin spray concentration of 200ppm. Each treatment was repeated 3 times (Ⅰ, Ⅱ, Ⅲ). Each repeat had 10 plants. Conventional field management. The test was completed 20 days after the last spray treatment, and the height of each plant was harvested and measured, and the average plant height of the 10 plants was calculated. The results are shown in Table 3.

[0091] Table 3

[0092]

[0093] As can be seen from Table 3, gibberellin has a significant promoting effect on the growth of hybrid Pennisetum, and 50ppm-200ppm are all effective, among which gibberellin 100ppm has the best cost-effectiveness.

[0094] The present application is not limited to the structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

[0095] In the present application, each embodiment may focus on the differences from other embodiments, and the same or similar parts between the embodiments may refer to each other.

Claims

1. A method for cultivating Pennisetum, comprising land preparation, fertilization and seedling cultivation, characterized in that: During the seedling cultivation stage, the minimum daily temperature of the growth environment should be controlled at 7-10℃ or above.

2. The Pennisetum cultivation method according to claim 1, characterized in that: During the seedling cultivation stage, the maximum daily temperature of the growth environment is controlled at 28-32℃.

3. The Pennisetum cultivation method according to claim 1, characterized in that: Strong seedling cultivation includes strong seedling cultivation for seedlings in seedbeds and strong seedling cultivation for field planting.

4. The Pennisetum cultivation method according to claim 3, characterized in that: The cultivation of strong seedlings for field planting includes the cultivation of strong seedlings for transplanting field seedlings and the cultivation of strong seedlings for direct planting in the field.

5. The Pennisetum cultivation method according to any one of claims 1 to 4, characterized in that: Strong seedling cultivation includes strong seedling cultivation in seedbeds; During the seedling cultivation stage, the daily minimum temperature of the growth environment is controlled to be 7-10℃ or above, including: In the cultivation of strong seedlings in the seedbed, when the daily minimum temperature of the natural environment for seedling cultivation is lower than 7-10℃, the seed nodes are enclosed by one or more combinations of greenhouses, arch sheds and ground films to control the daily minimum temperature of the growth environment for strong seedling cultivation to 7-10℃ or above.

6. The Pennisetum cultivation method according to any one of claims 1 to 4, characterized in that: Strong seedling cultivation includes strong seedling cultivation for field planting; During the seedling cultivation stage, the daily minimum temperature of the growth environment is controlled to be 7-10℃ or above, including: In the cultivation of strong seedlings planted in the field, when the daily minimum temperature of the natural environment in the field is lower than 7-10℃, the seed nodes or seedlings are enclosed by one or several combinations of greenhouses, arch sheds and ground films to control the daily minimum temperature of the growth environment for the cultivation of strong seedlings to 7-10℃ or above.

7. The Pennisetum cultivation method according to any one of claims 1 to 4, characterized in that: Seedling cultivation includes seedling cultivation in seedbeds. In seedling cultivation in seedbeds, the seedling density is controlled at 100-600 plants / m 2 ;or, Strong seedling cultivation includes strong seedling cultivation for field planting. In the strong seedling cultivation for field planting, the planting density is controlled at 600 to 3,000 plants per mu.

8. The Pennisetum cultivation method according to any one of claims 1 to 4, characterized in that: Also includes: Growth of field planting; in the middle and late stages of the growth stage of field planting, after the Pennisetum plants meet the preset conditions, two gibberellin spray treatments are carried out, and the interval between the two gibberellin spray treatments is 8 to 15 days.

9. The Pennisetum cultivation method according to claim 8, characterized in that: The preset conditions include: the height of the Pennisetum plant reaches 1.5 to 2.5 meters; or, the number of tillers of the Pennisetum plant reaches a preset number; or, 30 to 40 days before the Pennisetum is harvested; or, on the 60th day of planting.

10. The Pennisetum cultivation method according to claim 8, characterized in that: The concentration of gibberellin spray is 50-200ppm.

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