Biological fertilizer capable of advancing harvesting time of day lily as well as preparation method and application of biological fertilizer

Abstract

The invention relates to the technical field of agricultural bio-fertilizers, in particular to a bio-fertilizer for advancing the harvesting time of daylily and a preparation method and application thereof, the bio-fertilizer comprises a green Chinese onion leaf component, and the green Chinese onion leaf component comprises green Chinese onion leaves or rotten products of the green Chinese onion leaves. Field test data prove that the biological fertilizer has an adjusting effect on the growth cycle of the day lily, and the harvesting time of the day lily of the same batch can be effectively promoted to be advanced by 3-5 days. For large-scale farmer households, the biological fertilizer is applied in different areas in batches, so that the daylily in different areas can be matured integrally in batches. The planted daylily can be harvested in a peak shifting manner, so that on one hand, the labor pressure caused by concentrated harvesting can be relieved; and on the other hand, part of products can enter the market in advance to preempt sales, so that the competition pressure caused by centralized marketing is avoided.

Description

Technical Field

[0001] This application relates to the technical field of agricultural biological fertilizers, and particularly to a biological fertilizer for advancing the harvest period of daylilies, its preparation method, and application. Background Art

[0002] Daylily, also known as Hemerocallis citrina Baroni and Hemerocallis fulva (L.) L., is a perennial herbaceous plant of the Liliaceae family. Its roots are nearly fleshy, and often have spindle-shaped swellings in the middle and lower parts. Daylily is edible with flower buds, and is a nutritious vegetable containing various nutrients required by the human body. It has functions such as brain strengthening, milk secretion promoting, diuresis, beauty care, kidney nourishing and blood nourishing, cancer prevention, blood pressure lowering, etc., and is a rare beauty and health food.

[0003] Generally, for daylilies planted by the methods of seedling raising or rhizome division, there is almost no harvest in the first two years after planting, and harvest begins in the third year. Starting from the fourth year, it enters the high-yield period. However, daylilies are in the initial growth stage during the 1 - 3 years after planting, mainly showing single-plant growth and relatively small plant size. Therefore, the yield in this stage is relatively low. Since daylilies require a relatively wide row spacing and mostly adopt a single-plant planting mode, there are relatively large areas of idle land in the field, resulting in low land utilization rate. This directly affects the economic benefits of farmers and limits their income levels in the first three years.

[0004] To improve the utilization efficiency of land resources and increase farmers' income, an experiment on interplanting scallions was carried out between the rows of daylily planting. During the experiment, it was unexpectedly found that when the cut scallion leaves were buried around the daylily plants when harvesting scallions, the harvest period of daylilies in this area in the following year was significantly advanced compared with the control area where no scallion leaves were buried.

[0005] Based on this phenomenon, a special biological fertilizer that can effectively advance the harvest period of daylilies has been developed. Summary of the Invention

[0006] Based on this, this application provides a biological fertilizer for advancing the harvest period of daylilies.

[0007] A biological fertilizer for advancing the harvest period of daylilies, including scallion leaf components, and the scallion leaf components include scallion leaves or their decomposed products.

[0008] Preferably, it further includes daylily planting soil.

[0009] Preferably, the biological fertilizer is prepared by mixing and fermenting the scallion leaf components and the daylily planting soil.

[0010] Preferably, the mass ratio of the scallion leaf components to the daylily planting soil is 1:5 to 1:20.

[0011] Preferably, the preparation method of the biological fertilizer includes the following steps:

[0012] S1: Crush the green onion leaves into sections, crush the soil and sieve it, and evenly mix the green onion leaves and the daylily planting soil in proportion.

[0013] S2: Compost and ferment, turn it over every 10 to 24 hours or when the temperature of the fermented material pile rises above 65 °C, and the fermentation period is 15 to 30 days.

[0014] S3: After fermentation is completed, let it cool naturally to obtain bio-fertilizer.

[0015] Preferably, the mass ratio of the green onion leaves to the daylily planting soil is 1:5 to 1:20.

[0016] Preferably, the green onion leaves are in a fresh leaf state and need to be crushed to a length of less than 5 cm before fermentation.

[0017] Preferably, the application of bio-fertilizer in the field of daylily planting.

[0018] Preferably, after directly applying the bio-fertilizer around the roots of the daylily plants, water is applied.

[0019] The technical solution adopted in this application can achieve the following beneficial effects:

[0020] In the bio-fertilizer for advancing the daylily harvest period disclosed in the embodiments of this application: Through the resource utilization of agricultural waste, the green onion leaves and the daylily planting soil are mixed in proportion and then fermented to make bio-fertilizer. It is confirmed by field test data that this bio-fertilizer has a regulating effect on the growth cycle of daylilies and can effectively advance the harvest period of the same batch of daylilies by 3 to 5 days. For large-scale growers, by applying this bio-fertilizer in batches in different areas, the daylilies in different areas can be made to mature in batches as a whole. The daylilies planted by them can be harvested at staggered times. On the one hand, it can relieve the labor pressure brought by concentrated harvesting; on the other hand, some products can enter the market in advance, seize the sales opportunity, and avoid the competition pressure caused by concentrated listing. Description of the Drawings

[0021] Figure 1 It is the intercropping method of green onions and daylilies disclosed in the embodiments of this application;

[0022] Figure 2 It is the intercropping method of green onions and daylilies disclosed in another embodiment of this application.

[0023] Among them, daylily 100, soil ridge 200, planting ditch 300. Detailed Embodiments

[0024] To facilitate the understanding of this application, the following will provide a more comprehensive description of this application with reference to the relevant drawings. The preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of this application more thorough and comprehensive.

[0025] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right", "top", "bottom", "bottom end", "top end" and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the specification of this application herein are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0027] The biological fertilizer for advancing the harvest period of daylilies disclosed in the embodiments of this application: includes scallion leaf components, and the scallion leaf components include scallion leaves or their rotten products. Among them, the scallion leaves are from the part of the scallion leaves cut during the annual scallion harvest.

[0028] In this application, through the resource utilization of agricultural waste, the biological fertilizer made from scallion leaf components. Proven by field test data, this biological fertilizer has a regulating effect on the growth cycle of daylilies and can effectively advance the harvest period of the same batch of daylilies by 3 to 5 days. For large-scale growers, by applying this biological fertilizer in batches in different areas, the overall batch ripening of daylilies in different areas can be achieved. The daylilies planted by them can be harvested at staggered times. On the one hand, it can relieve the labor pressure brought by centralized harvesting; on the other hand, some products can enter the market in advance to seize the sales opportunity and avoid the competition pressure caused by centralized listing.

[0029] In one embodiment, it further includes daylily planting soil.

[0030] In one embodiment, the biological fertilizer is made by mixing and fermenting the scallion leaf components with the daylily planting soil.

[0031] In one embodiment, the mass ratio of the scallion leaf components to the daylily planting soil is 1:5 to 1:20.

[0032] Specifically, the preparation method of the biological fertilizer includes the following steps:

[0033] S1: Crush or cut the green onion leaves, crush the soil and sieve it, and evenly mix the green onion leaves and the daylily planting soil in proportion; among them, the daylily planting soil is selected from the tillage layer planting soil, and stones and impurities are removed.

[0034] S2: Compost fermentation, turn it once every 10 to 24 hours or when the temperature of the fermentation material pile rises by more than 65°C, and the fermentation cycle is 15 to 30 days;

[0035] Specifically, the compost is a strip stack with a height of 1 to 1.5 m and a width of 1.2 to 2 m, and is covered with breathable linen for heat preservation. The fermentation temperature is divided into three stages: the temperature-rising stage (1 to 3 days), the high-temperature stage (maintaining at 40 to 70°C for 10 to 30 days), and the temperature-dropping stage: the temperature naturally drops below 40°C in the later stage, and the fermentation tends to be completed.

[0036] S3: After the fermentation is completed, let it cool naturally to obtain the biological fertilizer. When the material pile has no odor and is in a dark brown or black loose state, it indicates that the green onion leaves are completely decomposed and the fermentation is over.

[0037] In an embodiment, the mass ratio of the green onion leaves to the daylily planting soil is 1:5 to 1:20.

[0038] In an embodiment, the green onion leaves are in a fresh leaf state and need to be crushed to a length of less than 5 cm before fermentation. Crushing the green onion leaves can increase the contact area with the soil, not only making the soil particles more fully wrap the surface of the crushed leaves, promoting the rapid release of organic substances in the green onion leaves into the soil, but also increasing the effective contact area between microorganisms and the green onion leaves, thereby accelerating the fermentation and decomposition process of the green onion leaves.

[0039] In an embodiment, the application of the biological fertilizer in the field of daylily planting. Further, the biological fertilizer is directly applied around the roots of the daylily plants and then watered. Specifically, dig a circular groove with a depth of 10 to 15 cm around the roots of the daylily plants, apply the fermented biological fertilizer into the groove at a dosage of 100 to 200 g per plant, and then water.

[0040] The following further illustrates the technical effects brought by the technical solution of the present invention through the experimental process.

[0041] The following experiments were conducted at the Modern Agriculture Experimental Base of Ningxia Academy of Agriculture and Forestry Sciences. This area belongs to a typical continental monsoon climate, with little rainfall, large evaporation, and dry climate. However, the shallow groundwater layer is widely distributed, with a high water level, good water quality, and rich mineral elements in the water. The soil organic matter content is between 0.5% and 1.5%, the soil pH value is about 8.5, and the annual average temperature is 9.2°C, which is suitable for planting daylilies. The basic physical and chemical properties of the tested soil are as follows: total nitrogen 1.73 g / kg, total phosphorus 1.16 g / kg, available nitrogen 120.07 mg / kg, available phosphorus 95.86 mg / kg, available potassium 738.23 mg / kg, organic matter 36.78 g / kg, and soil pH value 7.70 (soil-water ratio 5:1). The experimental period was four years, from September 2019 to August 2023.

[0042] Experiment 1: Experiment on intercropping daylilies with green onions (September 2019 - September 2022)

[0043] Select green onions and the main cultivated daylilies in Ningxia area for intercropping cultivation. The daylily variety is Dawuzui, and the green onion variety is Jingcong No. 3. The intercropping of green onions and daylilies is recorded as the intercropping group T1; only plant daylilies without intercropping, which is used as the control group T2. Each experimental field is one mu.

[0044] The steps of intercropping green onions between the rows of daylilies are as follows:

[0045] Land preparation: In late September 2019, fully irrigate the field. Apply fertilizers during irrigation. After the irrigation is completed, when the water in the land is fully absorbed and the land reaches the condition for deep plowing, start deep plowing the land and rake it flat.

[0046] Transplant daylilies: From late September to early October 2019, transplant daylilies using the method of dividing plants. The plant spacing is 35 cm, and the row spacing is planted in an alternating pattern of wide and narrow rows. The row spacing of the wide row is 80 cm, and the narrow row is 40 cm. For example, set it according to the rule of row spacing 80 cm, 40 cm, 40 cm, 80 cm, 40 cm...

[0047] Plant green onions: Between late April and mid-May 2020, use the method of flood irrigation or drip irrigation to fully irrigate, so that the soil moisture content of the daylily roots reaches 16% - 20%. And apply fertilizers. The fertilizers are mainly chemical fertilizers, including urea, superphosphate, potassium sulfate or potassium chloride. Organic fertilizers obtained by the comprehensive fermentation of human excrement and cake fertilizer can also be used as supplements.

[0048] After 3 to 5 days of sufficient irrigation, first, determine the row spacing for planting green onions in the wide row according to the existing wide and narrow row planting pattern of daylilies (the wide row spacing is 80 cm, and the narrow row spacing is 40 cm). The center line of the planting ditch is collinear with the center line of the wide row spacing. Set the width of the planting ditch to 25 cm and the depth to 30 cm. Deep plow the soil in the wide row (80 cm) between daylily rows to a depth of 40 cm. Dig the ditch according to the above data, and evenly pile up the excavated soil on both sides of the ditch to form a soil ridge with a width of 12.5 cm, and keep the horizontal distance between the soil ridge and the daylily plants at 15 cm to ensure that it does not affect the growth of daylily roots. Finally, plant green onions in the planting ditch and plant green onions at a plant spacing of 8 cm to ensure a reasonable plant density to optimize the growth space and nutrient utilization efficiency.

[0049] Harvesting daylilies: From mid-June to late July 2020 is the harvesting period of daylilies. The harvesting standard of daylilies is: the flower buds are plump, not yet blooming, and the middle of the flower buds is golden yellow, the two ends are green, and the purple at the top has completely faded. When harvesting, the flower buds and flower stalks cannot be damaged. It is required to bring the pedicel without the branch stalks. At the same time, the containers for holding the flower buds should be kept clean and hygienic, and be gently placed and poured, and cannot be rubbed and injured. And it is necessary to complete the harvesting of daylilies at the time point from 5 to 8 o'clock every morning to prevent daylilies from blooming.

[0050] Harvesting green onions: Start harvesting green onions from early September to the end of September 2020. After the green onions are mature, some people use a large fork or a spade to dig down one side of the onion ridge to the root of the green onions, expose the white part of the green onions, gently pull out the green onions by hand, and then shake off the soil and spread them out flat on the ground for appropriate drying. Another part of the people cut off the onion leaves of the green onions, keep the lower white part of the green onions and about 5 cm of onion leaves, and tie them into bundles and put them in frames.

[0051] Land preparation: After the green onions are completely harvested, plow and rake the soil in the daylily rows where the green onions are planted. Then appropriately loosen the soil around the roots of the daylily plants to increase soil air permeability and promote root growth.

[0052] Interplant continuously for three years, and separately count the yields of fresh daylilies and green onions in each plot, as shown in Table 1.

[0053] Table 1 Statistical results of planting experiments

[0054]

[0055] Conclusion: Daylily plants are in the vegetative growth stage in the first and second years after planting, and the fresh vegetable yield is almost zero at this stage; in the third year of growth, the plants begin to enter the reproductive growth stage and the daylily is harvested. The experimental group adopting the intercropping cultivation mode showed a significant yield-increasing effect compared with the single-crop control group, and its fresh daylily yield was significantly increased. Therefore, by planting green onions between the rows of daylilies, not only the spatial utilization efficiency of farmland is effectively improved, but also the yield of daylilies is increased. This three-dimensional planting mode gives full play to the growth characteristics of the two crops: daylily, as a perennial herb, has a long growth cycle and a large spacing between plants and rows; and green onions, as a fast-growing vegetable crop, can make full use of the idle land resources between the rows of daylilies. Not only does it achieve efficient utilization of land resources, but it also significantly increases the economic benefits of farmers by increasing the output per unit area.

[0056] During the harvesting process of the experiment of planting day lily and green onion together in the third year (June to July 2022), the researchers accidentally observed that some day lily plants in the experimental intercropping group showed a significant early harvesting period, which was earlier than the control group. After field investigation and tracing of the causes, it was found that the areas where these day lily plants with early harvesting periods were located had a significant feature: when harvesting green onions in the previous year, the harvesters left onion leaves around the roots of the day lily plants. This unexpected discovery provides an important clue for studying the impact of plant interactions on the regulation of harvesting periods. Based on this observation, the research team designed the following experiment (Experiment 2) to systematically explore the potential causal relationship between onion leaf residues and the early harvesting period of day lily.

[0057] Experiment 2: Experiment on the impact of the harvest period of daylily plants (September 2022 to August 2023)

[0058] Based on the finding that onion leaves affect the harvesting period of day lily in the third year (2022) of the experiment of planting day lily and green onion together, an experiment on the influence of onion leaves on the harvesting period of day lily was conducted at the Modern Agricultural Experimental Base of Ningxia Academy of Agricultural and Forestry Sciences from September 2022 to August 2023.

[0059] The two-year-old daylilies were selected as the test objects, and the test was conducted directly in the two-year-old daylily fields (experimental fields), and the planting method in the experimental fields was wide and narrow row planting. Experimental field 1: green onion leaves were spread around the roots of the daylily plants and green onions were planted between the rows of plants; experimental field 2: green onion leaves were spread around the roots of the daylily plants, but green onions were not planted between the rows; experimental field 3: green onion leaves were not spread around the roots of the daylily plants, and green onions were not planted between the rows of daylily plants. For the convenience of statistics, they were recorded as S1, S2, and S3 respectively. Each experimental field was one mu.

[0060] Harvesting green onions (intercropping group T1): From early September to late September 2022, when harvesting the green onions intercropped between the rows of daylilies in the intercropping group T1, first use a large fork or shovel to dig down one side of the onion ridge to the roots of the green onions, expose the white part of the onion, gently pull out the green onions by hand, then shake off the soil and spread them flat on the ground for appropriate drying. Secondly, sort and bundle the green onions, and then use a chopping knife to cut off the upper part of the onion leaves, only keeping the lower white part of the onion and about 5 cm of onion leaves. Finally, collect and crush the cut onion leaves for later use.

[0061] Spreading onion leaves: In early October 2022, appropriately loosen the soil around the daylily plants in the experimental fields where onion leaves need to be spread. Secondly, evenly spread the crushed onion leaves around the roots of the daylily plants in experimental fields S1 and S2, and cover the onion leaves with soil.

[0062] Planting green onions: Between late April and mid-May 2023, determine the row spacing required for planting green onions according to the existing row spacing in the daylily vegetable field, and use the green onion planting method in Experiment 1 to plant green onions in Experimental Field 1.

[0063] Harvesting daylilies: From mid-June to late July 2023 is the harvesting period of daylilies. Observe the state of the flower buds on the daylily plants in each experimental field.

[0064] Judgment of the harvesting period of daylilies: The harvesting period of daylilies is generally within the time period from mid-June to late July. After entering June, farmers need to observe the state of the flower buds in the daylily fields. If the flower buds of daylilies are plump, unopened, with the middle part of the flower bud being golden yellow, both ends being green, and the purple color at the top completely faded, and there are 1 to 3 qualified flower buds on a single plant, it can be judged that the daylilies enter the harvesting period. The harvesting period of daylilies is divided into three stages: the early harvesting stage, the middle harvesting stage, and the late harvesting stage. Early harvesting stage: The plants bloom sporadically, with a small daily flowering amount, about 1 to 3 flowers per single plant per day; Middle harvesting stage: The plants enter the flowering peak, with a significant increase in the daily flowering amount, and the group flowering amount accounts for 50% to 60% of the entire harvesting period; Late flowering stage: The flowering amount gradually decreases, and the number of flowers per single plant per day drops to 1 to 2.

[0065] In each experimental field, use the five-point sampling method to ensure that the samples cover different directions (east, west, south, north, middle) of the field block, and select healthy daylily plants without diseases and pests and in the same growth period. Mark 100 plants in each experimental field, label each plant with a number (such as A1 - A100), and record its position coordinates (such as row number / column number) for subsequent tracking and observation. When there are 1 to 3 flower buds that meet the harvesting standards on the daylily plants, it can be judged that this plant of daylilies enters the early harvesting stage. When more than half of the 100 marked daylily plants enter the early harvesting stage, it is determined that this is the initial harvesting period of daylilies.

[0066] After entering June, the marked plants in each experimental field were observed manually every day. On June 8, the grower found that 1 to 3 flower buds that met the harvest standard appeared on some of the marked daylily plants in Experimental Field 1 and Experimental Field 2. Therefore, starting from June 8, the number of marked daylily plants in each experimental field that entered the initial harvest period was recorded, and the number of plants in each experimental field that entered the initial harvest period at different times was counted separately, as shown in Table 2.

[0067] Table 2 Number of plants in each experimental field that entered the initial harvest period at different times

[0068] Strain S1 Strain S2 Strain S3 6.8 11 / 100 3 / 100 0 / 100 6.9 37 / 100 13 / 100 0 / 100 6.10 58 / 100 28 / 100 1 / 100 6.11 81 / 100 59 / 100 5 / 100 6.12 97 / 100 88 / 100 7 / 100 6.13 97 / 100 93 / 100 22 / 100 6.14 98 / 100 97 / 100 49 / 100 6.15 98 / 100 97 / 100 68 / 100 6.16 98 / 100 97 / 100 86 / 100 6.17 98 / 100 99 / 100 93 / 100 6.18 98 / 100 99 / 100 98 / 100

[0069] Conclusion: According to the comparison of the experimental data in the above table, the daylily plants in Experimental Fields S1 and S2 gradually entered the pre-harvest stage on June 10 and June 11, while the plants in Experimental Field S3 had not entered the harvest stage at this time and did not enter the pre-harvest stage until June 15, and its harvest period was significantly 3 to 5 days behind that of Experimental Fields S1 and S2.

[0070] Further analysis shows that during the cultivation of daylilies, whether spreading scallion leaves around the roots of daylilies alone or adding the treatment of intercropping scallions between rows on the basis of spreading scallion leaves, the harvest periods of the two cultivation methods are basically the same. Combining with the experimental results of intercropping scallions with daylilies in Experiment 1, it also shows that intercropping scallions between rows of daylilies has no effect on the harvest period of daylilies.

[0071] It can be concluded that by spreading scallion leaves around the roots of daylily plants and waiting for them to decompose naturally, the harvest period of daylilies can be effectively advanced by 3 to 5 days. For large-scale growers, by spreading scallion leaves in different areas, the daylilies can be matured in batches. The daylilies they plant can be harvested at staggered times. On the one hand, it can relieve the labor pressure brought by centralized harvesting; on the other hand, some products can enter the market in advance to seize the sales opportunity and avoid the competition pressure caused by centralized listing.

[0072] Experiment 3: Experiment on biological fertilizer for advancing the harvest period of daylilies (March 2024 - August 2024)

[0073] Based on the experiment on the influence of the harvest period of daylily plants in Experiment 2, spreading scallion leaves near the daylily plants and waiting for them to decompose naturally can effectively advance the harvest period of daylilies by 3 to 5 days. Based on this, a biological fertilizer for advancing the harvest period of daylilies is proposed. To make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail through experimental examples below.

[0074] Experimental materials:

[0075] Obtain scallion leaves in the experimental field 1 in September 2023: Part of the scallion leaves cut during the harvest of long white scallions; Daylily planting soil: Select the soil in the tillage layer for planting.

[0076] Raw material pretreatment: Crush the scallion leaves into uniform small segments about 2 cm long with a crusher. Select the soil in the tillage layer, manually remove stones and other impurities, crush the large particles in the planting soil, and then filter through a sieve to remove the uncrushed soil clods and larger particles to ensure that the planting soil has a fine texture.

[0077] Mixing and stacking: In a well-ventilated and rain-sheltered area, mix the pretreated scallion leaves and daylily planting soil at a mass ratio of 1:10. Use a layered stacking method during mixing and stir well until the whole material is uniform. Stack the mixed material into a strip stack with a height of 1.5 m and a width of 1.8 m, and cover the surface with breathable linen to keep warm and moisturize.

[0078] Fermentation process:

[0079] Temperature-rising stage: Insert a thermometer into the stack 30 cm deep every 12 hours to monitor the temperature. After 48 hours, the temperature rises above 40 °C, indicating the start of fermentation.

[0080] High-temperature stage: Adjust the temperature monitoring frequency to once every 6 hours. If the temperature is below 65 °C, turn the pile once every 12 hours; if the temperature exceeds 65 °C, immediately turn the pile to cool down to prevent excessive high temperature from inhibiting the activity of microorganisms. When turning the pile, turn the unfermented part on the outside into the inside to ensure uniform decomposition. After 28 days, there is no odor in the stack, the material is dark brown, and the scallion leaves are completely decomposed, indicating the completion of fermentation.

[0081] Post-treatment and storage: Spread out the mature compost and let it dry naturally, sieve to remove undecomposed impurities, and then bio-fertilizer can be obtained. Seal and package this fertilizer and store it in a cool and dry place to avoid moisture absorption.

[0082] Usage date: Apply the above-prepared bio-fertilizer to the daylily vegetable field in the first ten days of March 2024.

[0083] Experimental field selection: Select daylily fields with a plant age of 5 years as experimental fields, and the planting method in the experimental fields is wide-narrow row planting. Experimental field 1: Add the above-prepared bio-fertilizer around the daylily plants; Experimental field 2: Do not apply this bio-fertilizer near the daylily plants. For the convenience of statistics, they are respectively recorded as W1 and W2. Each experimental field is one mu.

[0084] Usage method: In the first ten days of March 2024, dig a 15-cm-deep circular groove around the daylily plants, apply the bio-fertilizer into the groove at a dosage of 150 g per hole, cover the soil and then water.

[0085] Sampling: The five-point sampling method was adopted in each experimental field to ensure that the samples covered different orientations (east, west, south, north, and middle) of the field. Hemerocallis plants that were robust in growth, free from pests and diseases, and at the same growth stage were selected. 100 plants were marked in each experimental field, and each plant was labeled with a number (such as A1 - A100), and its position coordinates (such as row number / column number) were recorded for subsequent tracking and observation. When there were 1 to 3 flower buds on the Hemerocallis plants that reached the harvest standard, it could be judged that the Hemerocallis plants of this strain entered the early harvest stage. When more than half of the 100 marked Hemerocallis plants entered the early harvest stage, it was determined that this time was the initial harvest period of Hemerocallis.

[0086] Recording: After entering June, the situation of the marked plants in each experimental field was observed manually every day. On June 10, the grower found that there were 1 to 3 flower buds that could reach the harvest standard on some of the marked Hemerocallis plants in multiple experimental fields. Therefore, starting from June 10, the number of marked Hemerocallis plants in each experimental field that entered the initial harvest period was recorded, and the number of plants that entered the initial harvest period in each experimental field at different times was separately counted, as shown in Table 3.

[0087] Table 3 The number of plants in each experimental field that entered the initial harvest period at different times

[0088] 6.10 6.11 6.12 6.13 6.14 6.15 6.16 6.17 6.18 W1 6 / 100 37 / 100 63 / 100 81 / 100 81 / 100 97 / 100 97 / 100 98 / 100 98 / 100 W2 0 / 100 1 / 100 3 / 100 7 / 100 14 / 100 29 / 100 56 / 100 78 / 100 99 / 100

[0089] Conclusion: According to the comparative analysis of the experimental data, it can be known that the W1 experimental field applying this biological fertilizer entered the harvest period on June 12. In contrast, the growth and development of the plants in the control group W2 experimental field without applying the present invention was significantly lagged, and it did not enter the early harvest stage until June 16, and its harvest period was 4 days later than that of the treatment group W1 experimental field.

[0090] Further analysis shows that during the cultivation process of Hemerocallis, applying this biological fertilizer can effectively promote the advance of the harvest period of Hemerocallis plants, which proves that the biological fertilizer of the present invention has a significant effect on advancing the harvest period of Hemerocallis.

[0091] It can be concluded that through the resource utilization of agricultural waste, biological fertilizer is made by mixing scallion leaves and Hemerocallis planting soil in proportion and then fermenting. Proven by the field test data, this biological fertilizer has a regulating effect on the growth cycle of Hemerocallis, and can effectively promote the harvest period of the same batch of Hemerocallis to be advanced by 3 to 5 days. For large-scale growers, by applying this biological fertilizer in batches in different areas, the Hemerocallis in different blocks can be matured in batches as a whole. The Hemerocallis they plant can be harvested at staggered times. On the one hand, it can relieve the labor pressure brought by centralized harvesting; on the other hand, some products can enter the market in advance to seize the sales opportunity and avoid the competition pressure caused by centralized listing.

[0092] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0093] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A biological fertilizer for advancing the harvest period of daylily, characterized in that, It includes scallion leaf components, and the scallion leaf components include scallion leaves or their rotten products.

2. The biological fertilizer for advancing the harvesting period of daylily according to claim 1, characterized in that, It also includes daylily planting soil.

3. The biological fertilizer for advancing the harvesting period of daylily according to claim 2, characterized in that, The biological fertilizer is made by mixing and fermenting the scallion leaf components and the daylily planting soil.

4. The biological fertilizer for advancing the harvesting period of daylily according to claim 2, characterized in that, The mass ratio of the scallion leaf components to the daylily planting soil is 1:5 to 1:

20.

5. A preparation method of the biological fertilizer according to any one of claims 1 to 4, characterized in that, It includes the following steps: S1: Crush the scallion leaves into sections, crush the soil and sieve it, and evenly mix the scallion leaves and the daylily planting soil in proportion. S2: Compost and ferment, turn it over once every 10 to 24 hours or when the temperature of the fermentation material pile rises above 65°C, and the fermentation period is 15 to 30 days. S3: After the fermentation is completed, let it cool naturally to obtain the biological fertilizer.

6. The preparation method according to claim 5, characterized in that, The mass ratio of the scallion leaves to the daylily planting soil is 1:5 to 1:

20.

7. The biological fertilizer for advancing the harvesting period of daylily according to claim 5, characterized in that, The scallion leaves are in the state of fresh leaves and need to be crushed to a length less than 5 cm before fermentation.

8. Application of the biological fertilizer according to any one of claims 1 to 4 in the field of daylily planting.

9. The application according to claim 8, characterized in that, Apply the biological fertilizer directly around the roots of the daylily plants and then water.

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