Foliar fertilizer formula for improving head rice rate of middle-season rice-ratooning rice and preparation method of foliar fertilizer formula

Abstract

The invention belongs to the technical field of preparation of foliar fertilizers, and particularly relates to a foliar fertilizer formula for increasing the head rice rate of middle-season rice-ratooning rice and a preparation method of the foliar fertilizer formula. By specifically combining amino acid manganese, ammonium phosphate, potassium chloride, zinc sulfate, brown sugar, a lysimachia christinae hance extracting solution and a fermentation solution of a complex microbial inoculant composed of bacillus megatherium, bacillus amyloliquefaciens and paenibacillus mucilaginosus, the chlorophyll content and antioxidant enzyme activity of plants can be improved, so that the stress resistance of the plants is enhanced; the photosynthesis of plants is improved, rapid growth and development of rice are promoted, and a foundation is laid for increasing the yield and head rice rate. Therefore, when the foliar fertilizer is sprayed on the leaf surfaces of the middle-season rice-ratooning rice, the yield and head rice rate of the middle-season rice-ratooning rice are improved, and scientific guidance is provided for the planting technology of the middle-season rice-ratooning rice.

Description

Technical Field

[0001] The invention belongs to the technical field of foliar fertilizer preparation, and particularly relates to a foliar fertilizer formula for improving the polished rice rate of medium-season rice and regenerated rice and a preparation method thereof. Background Art

[0002] Medium-season rice-regenerated rice is a special rice planting model. That is, in areas with suitable light and heat resources, the rice stumps after the first season of rice are harvested are used. Through scientific field management, the axillary buds on the rice stumps are allowed to germinate and grow again, and the ears are strong, and a season of rice is harvested. It has the characteristics of "planting one season and harvesting two seasons", which can effectively improve land utilization rate and grain yield.

[0003] However, ensuring high yields in the mid-season rice-spinning rice cultivation model requires frequent and extensive fertilization, resulting in high labor costs. Furthermore, inconsistent development of the ratoon panicles during the ratooning season can lead to inconsistent grain maturity. Low temperatures during the grain filling period hinder the transport of assimilates to the panicles, increasing the green rice percentage and decreasing the head rice percentage, impacting processing and appearance quality. Therefore, improving the head rice percentage and yield of the mid-season rice-spinning rice model while reducing labor costs is a pressing challenge for those skilled in the art. Summary of the Invention

[0004] The purpose of the present invention is to provide a foliar fertilizer formula for improving the polished rice rate of medium-season rice and ratoon rice and a preparation method thereof, which not only saves costs but also improves yield and polished rice rate.

[0005] The present invention provides a foliar fertilizer for improving the polished rice rate of medium-season rice and regenerated rice. The foliar fertilizer comprises the following raw materials in parts by mass:

[0006] 4.5-5.2 parts of manganese amino acid, 4-5 parts of ammonium phosphate, 1.5-2.5 parts of potassium chloride, 1.8-2.1 parts of zinc sulfate, 1.3-1.5 parts of brown sugar, 100-120 parts of fermentation liquid of composite bacterial agent, and 10-15 parts of Lysimachia chinensis extract;

[0007] The composite bacterial agent comprises: Bacillus megaterium, Bacillus amyloliquefaciens and Paenibacillus jelly-like.

[0008] Preferably, the method for preparing the fermentation broth comprises:

[0009] The composite bacterial agent is inoculated into the culture solution, and aerobic fermentation and solid-liquid separation are performed in sequence to obtain a fermentation solution of the composite bacterial agent;

[0010] The culture solution uses water as a solvent and includes the following components in the following concentrations: 1-3 g / L glucose, 0.2-0.6 g / L ammonium sulfate, 2-3 g / L dipotassium hydrogen phosphate, 1-3 g / L disodium 5'-adenylate, 0.3-0.5 g / L magnesium sulfate, and 2-4 g / L peptone.

[0011] Preferably, the mass volume ratio of the composite bacterial agent to the culture solution is 1.5-3 g:100 mL;

[0012] The mass ratio of Bacillus megaterium, Bacillus amyloliquefaciens and Paenibacillus gelatinosa in the composite bacterial agent is 0.5-0.6:0.1-0.2:1;

[0013] The effective viable counts of Bacillus megaterium, Bacillus amyloliquefaciens and Paenibacillus gelatinosa were 0.8×10 8 -1×10 8 cfu / g.

[0014] Preferably, the aerobic fermentation conditions include: a temperature of 36-42° C. and a time of 36-48 hours.

[0015] Preferably, the preparation of the Lysimachia sibiricum extract comprises:

[0016] The herb Lysimachia chinensis and water were mixed in a mass volume ratio of 1 g:10-12 mL, and the mixture was steamed and filtered in sequence to obtain a herb Lysimachia chinensis extract.

[0017] Preferably, the steaming is performed 2-3 times, and the time for each steaming is 1-1.5 hours.

[0018] The present invention provides a method for preparing the foliar fertilizer described in the above technical solution, comprising the following steps:

[0019] Manganese amino acid, ammonium phosphate, potassium chloride, zinc sulfate, brown sugar, fermentation liquid of the composite bacterial agent and Lysimachia sibiricum extract are uniformly stirred and filtered to obtain foliar fertilizer.

[0020] The present invention provides the use of the foliar fertilizer described in the above technical solution in improving the head rice rate and / or yield of medium-season rice and ratoon rice.

[0021] The present invention provides a method for improving the head rice rate and / or yield of medium-season rice and ratoon rice, comprising the following steps:

[0022] The foliage fertilizer described in the above technical solution is sprayed on the leaves of medium-season rice and regenerated rice.

[0023] Preferably, the dosage of the foliar fertilizer is: 120-150 mL / mu.

[0024] Beneficial effects:

[0025] The present invention provides a foliar fertilizer for improving the head rice rate of medium-season rice and regenerated rice. The foliar fertilizer comprises the following raw materials, measured by mass: 4.5-5.2 parts of manganese amino acid, 4-5 parts of ammonium phosphate, 1.5-2.5 parts of potassium chloride, 1.8-2.1 parts of zinc sulfate, 1.3-1.5 parts of brown sugar, 100-120 parts of fermentation liquid of a composite microbial agent, and 10-15 parts of a Herba Lysimachiae extract; the composite microbial agent comprises: Bacillus megaterium, Bacillus amyloliquefaciens, and Paenibacillus gelatinosa. The present invention, by specifically combining the above raw materials, can increase the chlorophyll content and antioxidant enzyme activity of the plant, thereby enhancing the plant's stress resistance, improving the plant's photosynthesis, promoting rapid growth and development of rice, and laying the foundation for increasing yield and head rice rate.

[0026] Based on these technical advantages, the present invention provides the use of the above-mentioned foliar fertilizer to increase the head rice rate and / or yield of mid-season rice and ratoon rice. Experiments have shown that spraying this foliar fertilizer on the leaves of mid-season rice and ratoon rice increased the yield and head rice rate of mid-season rice and ratoon rice, providing scientific guidance for mid-season rice and ratoon rice cultivation technology. DETAILED DESCRIPTION

[0027] In the present invention, unless otherwise specified, the raw materials, equipment and methods used are all conventionally selected.

[0028] The pH value of the culture solution of the present invention is preferably 6.2-6.5.

[0029] In order to further illustrate the present invention, the solutions provided by the present invention are described in detail below in conjunction with the embodiments, but they should not be understood as limiting the scope of protection of the present invention.

[0030] The Bacillus megaterium, Bacillus amyloliquefaciens, Paenibacillus gelatinosa, and Bacillus subtilis used in the experiment were purchased from the online Beihai Qunlin Biological Factory Store.

[0031] Example 1

[0032] A method for preparing foliar fertilizer for improving the polished rice rate of medium-season rice and ratoon rice, comprising the following steps:

[0033] (1) Preparation of composite bacterial fermentation broth

[0034] The effective viable count was 1×10 8 cfu / g of Bacillus megaterium, Bacillus amyloliquefaciens, and Bacillus mucilaginosus;

[0035] The Bacillus megaterium, Bacillus amyloliquefaciens and Paenibacillus gelatinosa were mixed in a mass ratio of 0.5:0.2:1 to obtain a composite bacterial agent;

[0036] Prepare culture medium: Dissolve 1 g of glucose, 0.4 g of ammonium sulfate, 2 g of dipotassium hydrogen phosphate, 1 g of disodium 5'-adenylate, 0.3 g of magnesium sulfate, and 2 g of peptone in 1000 mL of water. Adjust the pH of the culture medium and sterilize it for later use.

[0037] The composite bacterial agent and the culture solution were inoculated at a mass-to-volume ratio of 3 g:100 mL, and aerobic fermentation was carried out (stirring speed of 1200 rpm, temperature of 36° C., and time of 48 h) to obtain a fermentation product; and the fermentation solution of the composite bacterial agent was obtained by centrifugation.

[0038] (2) Preparation of Lysimachia chinensis extract

[0039] The Lysimachia christinae Hance sample was washed, dried and crushed in sequence to obtain a crushed material;

[0040] The crushed material was mixed with water at a ratio of 1 g:10 mL and then steamed for a first time for 1 hour, and filtered to obtain a first filtrate and a first filter residue; the first filter residue was mixed with water at a ratio of 1 g:10 mL and then steamed for a second time for 1 hour, and filtered to obtain a second filtrate; the first filtrate and the second filtrate were combined to obtain a Lysimachia scabra extract.

[0041] (3) Preparation of foliar fertilizer

[0042] In parts by mass, foliar fertilizer includes the following raw materials:

[0043] 4.5 parts of manganese amino acid, 4 parts of ammonium phosphate, 1.5 parts of potassium chloride, 1.8 parts of zinc sulfate, 1.3 parts of brown sugar, 100 parts of fermentation liquid of composite bacterial agent, and 10 parts of Lysimachia chinensis extract;

[0044] The above raw materials are mixed and stirred evenly until the raw materials are completely dissolved, and then filtered through a microporous filter membrane to obtain foliar fertilizer.

[0045] Example 2

[0046] A method for preparing foliar fertilizer for improving the polished rice rate of medium-season rice and ratoon rice, comprising the following steps:

[0047] (1) Preparation of composite bacterial fermentation broth

[0048] The effective viable count was selected to be 0.8×10 8 cfu / g of Bacillus megaterium, Bacillus amyloliquefaciens, and Paenibacillus gelatinosa;

[0049] The Bacillus megaterium, Bacillus amyloliquefaciens and Paenibacillus gelatinosa were mixed in a mass ratio of 0.6:0.1:1 to obtain a composite bacterial agent;

[0050] Prepare culture medium: Dissolve 1 g of glucose, 0.4 g of ammonium sulfate, 2 g of dipotassium hydrogen phosphate, 1 g of disodium 5'-adenylate, 0.3 g of magnesium sulfate, and 2 g of peptone in 1000 mL of water. Adjust the pH of the culture medium and sterilize it for later use.

[0051] The composite bacterial agent and the culture solution were inoculated at a mass-to-volume ratio of 3 g:100 mL, and aerobic fermentation was carried out (stirring speed of 1200 rpm, temperature of 36° C., and time of 48 h) to obtain a fermentation product; and the fermentation solution of the composite bacterial agent was obtained by centrifugation.

[0052] (2) Preparation of Lysimachia chinensis extract

[0053] Washing, drying and crushing the Lysimachia chinensis sample in sequence to obtain a crushed product;

[0054] The crushed material was mixed with water at a ratio of 1 g:10 mL and then steamed for a first time for 1 hour, and filtered to obtain a first filtrate and a first filter residue; the first filter residue was mixed with water at a ratio of 1 g:10 mL and then steamed for a second time for 1 hour, and filtered to obtain a second filtrate; the first filtrate and the second filtrate were combined to obtain a Lysimachia scabra extract.

[0055] (3) Preparation of foliar fertilizer

[0056] In parts by mass, foliar fertilizer includes the following raw materials:

[0057] 5 parts of manganese amino acid, 4.5 parts of ammonium phosphate, 1.5 parts of potassium chloride, 1.8 parts of zinc sulfate, 1.3 parts of brown sugar, 100 parts of fermentation liquid of composite bacterial agent and 15 parts of Lysimachia chinensis extract;

[0058] The above raw materials are mixed and stirred evenly until the raw materials are completely dissolved, and then filtered through a microporous filter membrane to obtain foliar fertilizer.

[0059] Comparative Example 1

[0060] A method for preparing foliar fertilizer for improving the polished rice rate of medium-season rice and ratoon rice, comprising the following steps:

[0061] The only difference from Example 1 is step (1), which is as follows:

[0062] (1) Preparation of composite bacterial fermentation broth

[0063] The effective viable count was 1×10 8 cfu / g of Bacillus megaterium, Bacillus amyloliquefaciens, and Bacillus subtilis;

[0064] The Bacillus megaterium, Bacillus amyloliquefaciens and Bacillus subtilis are mixed in a mass ratio of 0.5:0.2:1 to obtain a composite bacterial agent;

[0065] Prepare culture medium: Dissolve 1 g of glucose, 0.4 g of ammonium sulfate, 2 g / L of potassium hydrogen phosphate, 1 g / L of disodium 5'-adenylate, 0.3 g / L of magnesium sulfate, and 2 g of peptone in 1000 mL of water. Adjust the pH of the culture medium and sterilize it for later use.

[0066] The composite bacterial agent and the culture solution were inoculated at a mass-to-volume ratio of 3 g:100 mL, and aerobic fermentation was carried out (stirring speed of 1200 rpm, temperature of 36° C., and time of 48 h) to obtain a fermentation product; and the fermentation solution of the composite bacterial agent was obtained by centrifugation.

[0067] Comparative Example 2

[0068] A method for preparing foliar fertilizer for improving the polished rice rate of medium-season rice and ratoon rice, comprising the following steps:

[0069] The only difference from Example 1 is step (1), which is as follows:

[0070] (1) Preparation of composite bacterial fermentation broth

[0071] The effective viable count was 1×10 8 cfu / g of Bacillus megaterium, Bacillus amyloliquefaciens, and Paenibacillus gelatinosa;

[0072] The Bacillus megaterium, Bacillus amyloliquefaciens and Paenibacillus gelatinosa were mixed in a mass ratio of 0.5:0.2:1 to obtain a composite bacterial agent;

[0073] Prepare culture medium: Dissolve 5 g glucose, 0.2 g ammonium sulfate, 2 g potassium hydrogen phosphate, 0.8 g magnesium sulfate, and 2 g peptone in 1000 mL of water, adjust the pH of the culture medium, and sterilize it for later use.

[0074] The composite bacterial agent and the culture solution were inoculated at a mass-to-volume ratio of 3 g:100 mL, and aerobic fermentation was carried out (stirring speed of 1200 rpm, temperature of 36° C., and time of 48 h) to obtain a fermentation product; and the fermentation solution of the composite bacterial agent was obtained by centrifugation.

[0075] Comparative Example 3

[0076] A method for preparing foliar fertilizer for improving the polished rice rate of medium-season rice and ratoon rice, comprising the following steps:

[0077] The only difference from Example 1 is steps (2) and (3). The steps of steps (2) and (3) are as follows:

[0078] (2) Preparation of Lysimachia chinensis extract

[0079] The licorice (Glycyrrhiza uralensis Fisch) sample was washed, dried and crushed in sequence to obtain a crushed material;

[0080] The crushed material was mixed with water at a ratio of 1 g:10 mL and then steamed for a first time for 1 hour, and filtered to obtain a first filtrate and a first filter residue; the first filter residue was mixed with water at a ratio of 1 g:10 mL and then steamed for a second time for 1 hour, and filtered to obtain a second filtrate; the first filtrate and the second filtrate were combined to obtain a licorice extract.

[0081] (3) Preparation of foliar fertilizer

[0082] In parts by mass, foliar fertilizer includes the following raw materials:

[0083] 4.5 parts of manganese amino acid, 4 parts of ammonium phosphate, 1.5 parts of potassium chloride, 1.8 parts of zinc sulfate, 1.3 parts of brown sugar, 100 parts of fermentation liquid of composite bacterial agent and 10 parts of liquorice extract;

[0084] The above raw materials are mixed and stirred evenly until the raw materials are completely dissolved, and then filtered through a microporous filter membrane to obtain foliar fertilizer.

[0085] Comparative Example 4

[0086] A method for preparing foliar fertilizer for improving the polished rice rate of medium-season rice and ratoon rice, comprising the following steps:

[0087] The difference from Example 1 is that the process of preparing the composite bacterial agent fermentation broth in Example 1 is omitted, and the steps are as follows:

[0088] (1) Preparation of Lysimachia sibiricum extract:

[0089] Washing, drying and crushing the Lysimachia chinensis sample in sequence to obtain a crushed product;

[0090] The crushed material was mixed with water at a ratio of 1 g:10 mL and then steamed for a first time for 1 hour, and filtered to obtain a first filtrate and a first filter residue; the first filter residue was mixed with water at a ratio of 1 g:10 mL and then steamed for a second time for 1 hour, and filtered to obtain a second filtrate; the first filtrate and the second filtrate were combined to obtain a Lysimachia scabra extract.

[0091] (2) Foliar fertilizers include the following raw materials in parts by mass:

[0092] 4.5 parts of amino acid manganese, 4 parts of ammonium phosphate, 1.5 parts of potassium chloride, 1.8 parts of zinc sulfate, 1.3 parts of brown sugar, 1 part of composite bacterial agent, 10 parts of Lysimachia sibiricum extract and 100 parts of water; mix the above raw materials and stir evenly until the raw materials are completely dissolved, then filter through a microporous filter membrane to obtain foliar fertilizer;

[0093] Among them, the effective viable count was selected to be 1×10 8 cfu / g of Bacillus megaterium, Bacillus amyloliquefaciens and Paenibacillus gelatinosa; the Bacillus megaterium, Bacillus amyloliquefaciens and Paenibacillus gelatinosa are mixed in a mass ratio of 0.5:0.2:1 to obtain a composite bacterial agent.

[0094] Application Example 1

[0095] Select the experimental field with uniform paddy soil texture and medium to high fertility. Divide the experimental field into 7 plots, each with an area of ​​60m 2 Each treatment plot was isolated with special plastic sheets. Medium-season rice - ratoon rice (Yixiangyou 2115 variety) was planted in the conventional way, and conventional field management was carried out during the period.

[0096] Fertilization methods for mid-season rice and ratoon rice are as follows:

[0097] Apply base fertilizer once before transplanting rice;

[0098] Foliar fertilizer was sprayed twice during the jointing and booting stage of the first-season rice (with an interval of 7-8 days between the two times), and foliar fertilizer was sprayed once during the jointing and booting stage of the regenerated rice (i.e., the foliar fertilizers in Examples 1-2 and Comparative Examples 1-4 were diluted 400 times at a dosage of 150 mL per mu and then sprayed on the whole plant);

[0099] The treatment using only base fertilizer was used as the blank control.

[0100] In the above treatments, the actual yields of the first-season rice and the ratoon rice were counted at maturity and converted into standard yields based on a moisture content of 13.5%. The results are shown in Table 1.

[0101] Table 1 Rice yield in different treatments

[0102] deal with First-season rice yield (kg / mu) Ratoon rice yield (kg / mu) Total yield (kg / mu) Example 1 641.25 238.71 879.96 Example 2 640.78 240.15 880.93 Comparative Example 1 580.65 225.18 805.83 Comparative Example 2 575.68 205.87 781.55 Comparative Example 3 550.78 210.56 761.34 Comparative Example 4 560.32 222.89 783.21 Blank control 540.68 198.78 739.46

[0103] As can be seen from the data in Table 1, compared with the rice yield in Comparative Examples 1-4, the yield in Example 1-2 is high, and the yield per mu reaches about 880 kg; this shows that the foliar fertilizer prepared by the technical solution provided by the present invention is more conducive to the absorption and use of rice; while in the comparative examples, the yield is relatively low when the preparation method or component dosage of the foliar fertilizer is changed, which shows that the foliar fertilizers in the comparative examples are not conducive to the absorption and conversion of rice.

[0104] Application Example 2

[0105] 10 kg of first-season rice and 10 kg of regenerated rice from each treatment (Examples 1-2, Comparative Examples 1-4, and blank control) in Application Example 1 were randomly taken. After shelling, grinding, and screening, the weight of the polished rice was counted, and the polished rice rate was calculated. The results are shown in Table 2.

[0106] Table 2 Head rice rate of rice in different treatments

[0107] deal with First-season rice head rice rate (%) Ratoon rice head rice rate (%) Example 1 72.1 65.5 Example 2 71.8 64.3 Comparative Example 1 62.5 60.7 Comparative Example 2 60.8 60.1 Comparative Example 3 61.4 61.5 Comparative Example 4 59.8 57.4 Blank control 58.6 55.4

[0108] As can be seen from the data in Table 2, compared with the polished rice rates of the middle-season rice in Comparative Examples 1-4, the polished rice rates of the first-season rice in the examples reached a maximum of 72.1%, and the polished rice rates of the replanted rice reached a maximum of 65.5%. In contrast, the polished rice rates of the first-season rice in the comparative examples and the blank control were only 62.5% and 60.7% respectively. It can be seen that the foliar fertilizer prepared by the present invention is beneficial for improving the polished rice rates of middle-season rice and replanted rice.

[0109] In summary, the present invention specifically combines amino acid manganese, ammonium phosphate, potassium chloride, zinc sulfate, brown sugar, Lysimachia sibiricum extract, and the fermentation liquid of a composite bacterial agent composed of Bacillus megaterium, Bacillus amyloliquefaciens, and Bacillus jelly-like. This can increase the chlorophyll content and antioxidant enzyme activity of the plant, thereby enhancing the stress resistance of the plant, improving the photosynthesis of the plant, and promoting the rapid growth and development of rice, laying the foundation for increasing yield and the rate of polished rice. Therefore, spraying the foliage fertilizer on the leaves of medium-season rice-regenerated rice increases the yield and rate of polished rice of medium-season rice-regenerated rice, providing scientific guidance for the planting technology of medium-season rice-regenerated rice.

[0110] Although the above embodiment provides a detailed description of the present invention, it is only a part of the embodiments of the present invention, not all of the embodiments. People can also obtain other embodiments based on this embodiment without creativity, and these embodiments all fall within the scope of protection of the present invention.

Claims

1. A foliar fertilizer for improving the polished rice rate of medium-season rice and ratoon rice, characterized in that: The foliar fertilizer comprises the following raw materials in parts by mass: 4.5-5.2 parts of manganese amino acid, 4-5 parts of ammonium phosphate, 1.5-2.5 parts of potassium chloride, 1.8-2.1 parts of zinc sulfate, 1.3-1.5 parts of brown sugar, 100-120 parts of fermentation liquid of composite bacterial agent, and 10-15 parts of Lysimachia chinensis extract; The composite bacterial agent comprises: Bacillus megaterium, Bacillus amyloliquefaciens and Paenibacillus jelly-like.

2. Foliar fertilizer according to claim 1, is characterized in that, The preparation method of the fermentation broth comprises: The composite bacterial agent is inoculated into the culture solution, and aerobic fermentation and solid-liquid separation are performed in sequence to obtain a fermentation solution of the composite bacterial agent; The culture solution uses water as a solvent and includes the following components in the following concentrations: 1-3 g / L glucose, 0.2-0.6 g / L ammonium sulfate, 2-3 g / L dipotassium hydrogen phosphate, 1-3 g / L disodium 5'-adenylate, 0.3-0.5 g / L magnesium sulfate, and 2-4 g / L peptone.

3. Foliar fertilizer according to claim 2, is characterized in that, The mass volume ratio of the composite bacterial agent to the culture solution is 1.5-3 g:100 mL; The mass ratio of Bacillus megaterium, Bacillus amyloliquefaciens and Paenibacillus gelatinosa in the composite bacterial agent is 0.5-0.6:0.1-0.2:1; The effective viable counts of Bacillus megaterium, Bacillus amyloliquefaciens and Paenibacillus gelatinosa were 0.8×10 8 -1×10 8 cfu / g.

4. foliar fertilizer according to claim 2, is characterized in that, The conditions of the aerobic fermentation include: a temperature of 36-42° C. and a time of 36-48 hours.

5. Foliar fertilizer according to claim 1, is characterized in that, The preparation of the Herba Lysimachiae extract comprises: The herb Lysimachia chinensis and water were mixed in a mass volume ratio of 1 g:10-12 mL, and the mixture was steamed and filtered in sequence to obtain a herb Lysimachia chinensis extract.

6. Foliar fertilizer according to claim 5, is characterized in that, The steaming is performed 2-3 times, and the time for each steaming is 1-1.5 hours.

7. The method for preparing the foliar fertilizer according to any one of claims 1 to 6, wherein The steps include: Manganese amino acid, ammonium phosphate, potassium chloride, zinc sulfate, brown sugar, fermentation liquid of the composite bacterial agent and Lysimachia sibiricum extract are uniformly stirred and filtered to obtain foliar fertilizer.

8. Use of the foliar fertilizer according to any one of claims 1 to 6 in improving the head rice rate and / or yield of mid-season rice or ratoon rice.

9. A method for increasing the head rice rate and / or yield of mid-season rice and ratoon rice, characterized in that: The steps include: The foliar fertilizer according to any one of claims 1 to 6 is sprayed on the leaves of mid-season rice and regenerated rice.

10. The method according to claim 9, characterized in that The dosage of the foliar fertilizer is: 120-150 mL / mu.