Method for increasing emergence rate of king grass

Abstract

The invention discloses a method for increasing the emergence rate of king grass. The method comprises the following steps: step 1, selecting seed stems of high-quality king grass; step 2, soaking the seed stems of the high-quality king grass with gibberellin; 3, planting is conducted in an oblique cutting mode. According to the method provided by the invention, the seed stems of the king grass are subjected to medicament and soaking treatment, so that the planting emergence rate of the king grass is increased by 19.35% or above when the king grass is horizontally planted, meanwhile, seed age management can be performed according to different planting months, seeds are reserved from May to June if the king grass is planned to be planted in February, and the whole-year planting of the king grass in tropical and subtropical regions can be realized.

Description

Technical Field

[0001] The invention relates to the technical field of crop cultivation, and in particular to a method for improving the emergence rate of royal grass. Background Art

[0002] King grass, also known as royal bamboo grass in Chinese, is a plant of the genus Pennisetum in the family Poaceae. King grass is native to Colombia and is mainly distributed in Central and South America. It was introduced by the Chinese Academy of Tropical Agricultural Sciences in 1982 and is widely cultivated in Hainan, Guangdong and Guangxi in China. It is also introduced and cultivated in Jiangsu, Fujian, Yunnan and Hunan. King grass is a tropical and subtropical high-quality and high-yield forage grass with an annual yield of 15-30 tons. It can effectively solve the problem of grass shortage for livestock and has broad development prospects.

[0003] However, in the process of planting for many years, people generally stop mowing and retaining seed stems after September, and the planting time of the next year is combined with the rainy season. The emergence rate of king grass is very low when planted at other times, even only 20-30%, so that 1-2 artificial seedlings are needed in the later stage, which increases the management cost. Therefore, how to break through the planting time limit of king grass, realize the year-round supply of seed stems and improve the emergence rate of king grass has become an urgent problem that needs to be solved. Summary of the invention

[0004] In view of this, the present invention provides a method for improving the emergence rate of royal grass.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A method for improving the emergence rate of royal grass, characterized in that it comprises the following steps:

[0007] Step 1: Select high-quality king grass seed stems;

[0008] Step 2: Soak the seed stems of high-quality king grass with gibberellin;

[0009] Step 3: Planting by oblique planting method;

[0010] Preferably, in step 1, the high-quality royal grass is 9-month-old royal grass.

[0011] Preferably, in step 1, the seed stems of high-quality king grass are selected from the following positions: the middle of the stem and the upper part of the stem.

[0012] Preferably, in step 2, the concentration of gibberellin is 500 mg / L.

[0013] Preferably, in step 2, the soaking time in gibberellin is 60 minutes.

[0014] Preferably, in step 3, the planting method of the king grass seed stems is oblique insertion, and the cutting angle is 60-75°.

[0015] Compared with the prior art, the present invention has achieved the following technical effects:

[0016] (1) The method provided by the present invention can determine the last mowing time according to different planting times, by controlling the seed stem age of the king grass to 9 months, at which time the seed stem is fully mature and the spores are full, which can provide sufficient nutrients for seedling emergence.

[0017] (2) The present invention promotes the germination ability of spores by using gibberellins (GA), and by soaking the seed stems, the seed stems of the king grass absorb sufficient water, thereby reducing the dependence on rainfall, and realizing the supply of seed stems throughout the year. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a diagram showing the best effect of a method for improving the emergence rate of royal grass according to the present invention. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] The invention discloses a method for improving the emergence rate of royal grass, comprising the following steps:

[0021] Step 1: Select the middle and upper part of the stem of high-quality 9-month-old king grass;

[0022] Step 2: Soak the seed stems of high-quality king grass in 500 mg / L gibberellin for 60 minutes;

[0023] Step 3: Use an oblique cutting angle of 60-75° for planting.

[0024] Experimental Example 1:

[0025] The test site is located in Lujiang Town, Longyang District, Baoshan City, Yunnan Province. The climate type is a transitional type of low-latitude quasi-tropical monsoon rain forest to dry-hot river valley. The test site is 690m above sea level, with an annual average temperature of 21.50℃ and precipitation of 475.2mm.

[0026] 1. Materials and Methods

[0027] The test variety is king grass seed stem, and each seed stem has 2 undamaged, disease-free and insect-free spores.

[0028] Test methods

[0029] A multi-factor completely randomized block design was used, in which factor A was the seed month and age, factor B was the soaking time, and factor C was the gibberellin (GA) concentration, as shown in Table 1. A total of 80 treatments were set up in the experiment, including 75 multi-factor treatments and 5 controls with no treatment at various months and ages. Each treatment was repeated 3 times, and the area of ​​each plot was 15m 2 (5.0m×3.0m), the spacing between cells is 1.5m, 30 plants are planted in each cell, and the spacing between rows and plants is 0.6m×0.8m.

[0030] Data processing

[0031] XLSX worksheet was used for data statistical analysis.

[0032] Table 1 Experimental treatment setting table

[0033]

[0034] Note: In A, m stands for Month, which is the age of the seed stem in months; y stands for year, which is the age of the seed stem; the following capital letters and numbers represent the treatment methods, such as A1B1C1 represents 4-month-old seed stems soaked in 100 mg / L gibberellin for 30 minutes, and CK1 represents 4-month-old seed stems without any treatment.

[0035] 2. Test management

[0036] On March 20, 2023, king grass was planted. Two undamaged, disease-free and insect-free spores were retained on each seed stem. The planting method was flat and covered with 5-8 cm of soil. The germination rate of each treatment was observed after 30 days.

[0037] 3. Test results

[0038] According to the month and age of the seed stems, different concentrations and soaking times of gibberellins have different effects on their germination rate. For 4-month-old seed stems, the germination rate was significantly inhibited compared with the control (CK1), and reached the lowest level of 7.14% when soaked in 400 mg / L for 60 minutes. The germination rate of 5-month-old, 9-month-old, 1-year-old and 2-year-old seed stems will be improved in the pre-treatment of gibberellins at a certain concentration. Among them, the germination rate of 5-month-old seed stems was the highest after soaking in 400 mg / L gibberellin for 60 minutes, which was 77.78%; the germination rate of 9-month-old seed stems was the highest after soaking in 500 mg / L gibberellin for 60 minutes, which was 82.22%; the germination rate of 1-year-old seed stems was the highest after soaking in 300 mg / L gibberellin for 30 minutes, which was 72.22%; the germination rate of 2-year-old seed stems was the highest after soaking in 100 mg / L gibberellin for 30 minutes, which was 52.22%, which was 22.22% higher than the control (CK5), as shown in Table 2.

[0039] Table 2 Effects of different treatment combinations on seed stem emergence rate

[0040]

[0041]

[0042] in conclusion

[0043] The germination rate of 9-month-old king grass seed stems was the highest after being soaked in 500 mg / L gibberellin for 60 minutes, reaching 82.22%, which was 19.35% higher than CK.

[0044] Experimental Example 2:

[0045] The basic conditions of this test site are consistent with those of Experimental Example 1.

[0046] 1. Materials and Methods

[0047] The test variety was 9-month-old king grass seed stems, and each seed stem retained 2 undamaged, disease- and insect-free spores.

[0048] Test methods

[0049] A single-factor completely randomized block design was used, in which factor A was the upper part of the seed stem, factor B was the middle part of the seed stem, and factor C was the lower part of the seed stem (set as the control CK). There were three treatments in the experiment, each with three replicates, and each plot had an area of ​​15m 2 (5.0m×3.0m), the spacing between cells is 1.5m, 30 plants are planted in each cell, and the spacing between rows and plants is 0.6m×0.8m.

[0050] Data processing

[0051] DPS V9.01 statistical software was used for univariate completely random comparison and Duncan's new multiple range method was used to test the significance of the difference.

[0052] 2. Test management

[0053] On October 18, 2023, royal grass was planted flat and covered with 5-8 cm of soil. The germination rate of each treatment was observed after 30 days.

[0054] 3. Test results

[0055] As can be seen from Table 3, the germination rates in the middle and upper parts of the king grass seed stem were the highest, both at 48.89%, which were 18.92% higher than the lower part of the king grass seed stem (CK), but there was no significant difference in the germination rates between different parts.

[0056] Table 3 Comparison of the effects of different parts of the seed stem on the germination rate

[0057]

[0058] Note: Different lowercase letters indicate significant differences at the 5% level, and different uppercase letters indicate extremely significant differences at the 1% level.

[0059] 4. Conclusion

[0060] The germination rate of the middle and upper parts of the king grass seed stem was greater than that of the lower part.

[0061] Experimental Example 3:

[0062] The basic conditions of this test site are consistent with those of Experimental Example 1.

[0063] 1. Materials and Methods

[0064] The test variety was 9-month-old king grass seed stems, and each seed stem retained 2 undamaged, disease- and insect-free spores.

[0065] Test methods

[0066] A single-factor completely randomized block design was used, in which factor A was flat planting (covered with 5-8 cm of soil, set as control CK), and factor B was oblique planting (planting angle 60-75°, the first bud was completely inserted into the soil, and the second bud was in contact with the soil surface). There were 2 treatments in the experiment, and each treatment was repeated 3 times. Each plot had an area of ​​15m 2 (5.0m×3.0m), the spacing between cells is 1.5m, 30 plants are planted in each cell, and the spacing between rows and plants is 0.6m×0.8m.

[0067] The experimental seed stems were all treated as follows: the upper and middle parts of the 9-month-old king grass stems were selected as seed stems, and 500 mg / L gibberellin (GA) was prepared as a soaking agent. The seed stems were soaked for 60 minutes, and then laid flat or obliquely planted.

[0068] Data processing

[0069] DPS V9.01 statistical software was used for univariate completely random comparison and Duncan's new multiple range method was used to test the significance of the difference.

[0070] 2. Test management

[0071] King grass was planted on May 17, 2024, and the emergence rate of each treatment was observed 30 days later.

[0072] 3. Test results

[0073] As can be seen from Table 4, the germination rate of obliquely planted king grass was the highest, reaching more than 90.00%, which was 15.28% higher than that of horizontally planted king grass, and reached a significant difference at the 5% level.

[0074] Table 4 Comparison of the effects of different planting methods on the emergence rate of king grass

[0075]

[0076] Note: Different lowercase letters indicate significant differences at the 5% level, and different uppercase letters indicate extremely significant differences at the 1% level.

[0077] Conclusion: The seed stems in the middle and upper part of the stalks of 9-month-old king grass were soaked in 500 mg / L gibberellin (GA) for 60 minutes and planted obliquely, and the germination rate could reach more than 90.00%.

[0078] In summary, compared with the traditional method of planting king grass seed stems flat without any treatment, the experiment shows that: by selecting king grass in the middle and upper part of the stems with a seed age of 9 months as seed stems, soaking them in a 500 mg / L gibberellin (GA) solution for 60 minutes, and then using an oblique planting method after treatment, the germination rate of king grass seed stems was significantly improved, making it suitable for promotion and application.

[0079] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A method for increasing the emergence rate of royal grass, characterized in that: The following steps are involved: Step 1: Select high-quality king grass seed stems; Step 2: Soak the seed stems of high-quality king grass with gibberellin; Step 3: Planting using an oblique planting method.

2. A method for increasing the emergence rate of royal grass according to claim 1, characterized in that: In step 1, the high-quality royal grass is 9-month-old royal grass.

3. A method for increasing the emergence rate of royal grass according to claim 1, characterized in that: In step 1, the seed stems of high-quality king grass are selected from the following positions: the middle of the stem and the upper part of the stem.

4. A method for increasing the emergence rate of royal grass according to claim 1, characterized in that: In the step 2, the concentration of gibberellin is 500 mg / L.

5. The method for increasing the emergence rate of royal grass according to claim 1, characterized in that: In the step 2, the soaking time with gibberellin is 60 minutes.

6. A method for increasing the emergence rate of royal grass according to claim 1, characterized in that: In step 3, the planting method of the king grass seed stems is oblique insertion, and the cutting angle is 60-75°.

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