Cultivation method of fragrant rice

Abstract

The invention discloses a cultivation method of fragrant rice, and belongs to the technical field of rice planting. The cultivation method of the fragrant rice comprises the steps that seeds of the fragrant rice are sown from May 15 to June 5, and seedlings are transplanted from June 15 to July 5; in the filling and fruiting period of the fragrant rice, filling is completed at the average daily temperature of 24-28 DEG C of the main body; field fertilizer management: before rice transplanting, applying a nitrogen-phosphorus-potassium fertilizer and a special fertilizer for rice fragrance in the field; the mass ratio of the nitrogen-phosphorus-potassium fertilizer to the special fertilizer for rice fragrance is 1: (0.3-0.4); the application amount of the nitrogen-phosphorus-potassium fertilizer is 7-8 kg / mu; nitrogenous fertilizer is applied in the tillering stage of rice. Fragrant components in the fragrant rice obtained by the cultivation method of the fragrant rice are obviously improved.

Description

Technical Field

[0001] The invention relates to the technical field of rice planting, and in particular to a method for cultivating fragrant rice. Background Art

[0002] Aromatic rice is a special type of rice with a special aroma. It is increasingly loved by people for its fresh and delicious taste and is known as a treasure among rice. As a special rice variety, the value of aromatic rice is higher than that of ordinary rice, and it has extremely important commercial value and industrial significance.

[0003] A large number of studies have shown that whether rice has fragrance and how strong the fragrance is are mainly determined by the compound 2-acetyl-1-pyrroline (2-AP). The earliest studies showed that the 2-AP content of fragrant rice is 0.04-0.09 mg / kg. In my country, a number of fragrant rice varieties have been selected and bred, including Meixiangzhan No. 2, Ivory Xiangzhan, 19 Xiang, Ruanhuayou 6100, Yuxiang 203, Huoxiang No. 2, Longxiangdao No. 2, Luxiangnuo, Baguixiang Nongxiang 18, Neiyouhang 148, and Guimoxiang No. 1, and have been well applied and promoted in actual production.

[0004] The content of 2-AP in aromatic rice directly affects the strength of the aroma of aromatic rice and is positively correlated. How to increase or stabilize the aroma components of aromatic rice varieties to achieve the effect of increasing or maintaining the aroma of aromatic rice is a technical problem that the existing technology needs to solve. Summary of the invention

[0005] The purpose of the present invention is to overcome the above technical deficiencies, provide a method for cultivating fragrant rice, and solve the technical problem of how to improve the aroma components of fragrant rice varieties in the prior art.

[0006] In order to achieve the above technical purpose, the technical solution of the present invention provides a method for cultivating fragrant rice, comprising:

[0007] The seeds of fragrant rice are sown between May 15 and June 5, and the seedlings are transplanted between June 15 and July 5. The grain filling and fruiting period of fragrant rice is completed when the average daily temperature is 24℃ to 28℃.

[0008] Field fertilizer management:

[0009] Before transplanting, apply nitrogen, phosphorus, potassium fertilizer and rice fragrance fertilizer in the field; the mass ratio of nitrogen, phosphorus, potassium fertilizer and rice fragrance fertilizer is 1: (0.3-0.4); the application rate of nitrogen, phosphorus, potassium fertilizer is 7-8 kg / mu;

[0010] Apply nitrogen fertilizer during the tillering stage of rice.

[0011] In any embodiment, the planting density of the seedlings is 15,000 to 17,000 holes / 667m 2 .

[0012] In any embodiment, the mass ratio of nitrogen fertilizer, phosphorus fertilizer and potassium fertilizer in the nitrogen, phosphorus and potassium fertilizers is 1:(0.5-0.6):(0.5-0.6); and / or, the special fertilizer for rice fragrance, calculated by mass, includes 10-20% organic fertilizer, 20-24% urea, 50-55% superphosphate, 9-11% potassium chloride, and 2-3% zinc sulfate.

[0013] In any embodiment, the amount of nitrogen fertilizer applied during the tillering stage of rice is 2-3 kg / mu.

[0014] In any embodiment, it is also included in the steps of applying ear fertilizer during the ear-breaking stage of rice; spraying on the leaves; and spraying on the leaves at a rate of 5-6 kg / mu.

[0015] In any embodiment, the ear fertilizer, calculated based on a total mass fraction of 100%, includes 0.2-0.4% magnesium chloride, 0.4-0.8% zinc sulfate, 0.1-0.2% sodium selenite, 0.1-0.2% lanthanum chloride, and the rest is water.

[0016] In any embodiment, the seeds of the aromatic rice are sown between May 28 and May 31, and the seedlings are transplanted between June 29 and July 1.

[0017] In any embodiment, the variety of the fragrant rice is Yexiang Youyousi, 19xiang or Huaxiaxiangsi.

[0018] In any embodiment, the rice is harvested when it is 90% mature.

[0019] Compared with the prior art, the beneficial effects of the present invention include: the cultivation method of the fragrant rice proposed by the present invention comprises: sowing the seeds of the fragrant rice during the period from May 15 to June 5, and transplanting the seedlings during the period from June 15 to July 5; the filling of the fragrant rice is completed when the average temperature of the main day is 24°C to 28°C; field fertilizer management: before transplanting, nitrogen, phosphorus, potassium fertilizers and special fertilizers for rice fragrance are applied in the field; the mass ratio of nitrogen, phosphorus, potassium fertilizers to the special fertilizers for rice fragrance is 1:(0.3-0.4); the application amount of nitrogen, phosphorus, potassium fertilizers is 7-8 kg / mu; nitrogen fertilizers are applied during the tillering period of rice, and the fragrance components in the obtained fragrant rice are significantly improved. DETAILED DESCRIPTION

[0020] The "range" disclosed in the present application is defined in the form of a lower limit and an upper limit, and a given range is defined by selecting a lower limit and an upper limit, and the selected lower limit and upper limit define the boundaries of the particular range. The range defined in this way can be inclusive or exclusive of the end values, and can be arbitrarily combined, that is, any lower limit can be combined with any upper limit to form a range. For example, if a range of 60 to 120 and 80 to 110 is listed for a particular parameter, it is understood that a range of 60 to 110 and 80 to 120 is also expected. In addition, if the minimum range values ​​1 and 2 are listed, and if the maximum range values ​​3, 4 and 5 are listed, the following ranges can all be expected: 1 to 3, 1 to 4, 1 to 5, 2 to 3, 2 to 4 and 2 to 5. In the present application, unless otherwise specified, the numerical range "a to b" represents an abbreviation of any real number combination between a and b, where a and b are both real numbers. For example, the numerical range "0-5" means that all real numbers between "0-5" are listed in this document, and "0-5" is just an abbreviation of these numerical combinations. In addition, when a parameter is expressed as an integer ≥ 2, it is equivalent to disclosing that the parameter is, for example, an integer of 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc.

[0021] If there is no special explanation, the "include" and "comprising" mentioned in this application are open-ended or closed-ended. For example, the "include" and "comprising" may mean that other components not listed may also be included or only the listed components may be included or only the listed components may be included.

[0022] If not specifically stated, in this application, the term "or" is inclusive. For example, the phrase "A or B" means "A, B, or both A and B". More specifically, any of the following conditions satisfies the condition "A or B": A is true (or exists) and B is false (or does not exist); A is false (or does not exist) and B is true (or exists); or both A and B are true (or exist).

[0023] This specific embodiment provides a method for cultivating fragrant rice, comprising:

[0024] The seeds of fragrant rice are sown from May 15 to June 5, and the seedlings are transplanted from June 15 to July 5; the grain filling and fruiting period of fragrant rice is completed when the average daily temperature is 24℃ to 28℃; the planting density of the seedlings is 15,000 to 17,000 holes / 667m 2 ; In transplanting seedlings, 2 to 3 seedlings of hybrid fragrant rice are planted in each hole, and 3 to 5 seedlings of conventional fragrant rice are planted in each hole;

[0025] Field fertilizer management:

[0026] Before transplanting rice seedlings, nitrogen, phosphorus and potassium fertilizers and special fertilizers for rice fragrance are applied in the field; the mass ratio of nitrogen, phosphorus and potassium fertilizers to the special fertilizers for rice fragrance is 1:(0.3-0.4); the application amount of nitrogen, phosphorus and potassium fertilizers is 7-8 kg / mu; the mass ratio of nitrogen fertilizer, phosphorus fertilizer and potassium fertilizer in the nitrogen, phosphorus and potassium fertilizers is 1:(0.5-0.6):(0.5-0.6); the special fertilizers for rice fragrance, calculated by mass, include 10-20% organic fertilizer, 20-24% urea, 50-55% superphosphate, 9-11% potassium chloride and 2-3% zinc sulfate;

[0027] Apply nitrogen fertilizer during the tillering stage of rice; the amount of nitrogen fertilizer is 2-3 kg / mu;

[0028] Apply ear fertilizer during the ear-breaking period of rice; spray on the leaves; spray the ear fertilizer on the leaves at a rate of 5-6 kg / mu; the ear fertilizer, calculated based on a total mass fraction of 100%, includes 0.2-0.4% magnesium chloride, 0.4-0.8% zinc sulfate, 0.1-0.2% sodium selenite, 0.1-0.2% lanthanum chloride, and the rest is water;

[0029] Harvest when the rice is 90% mature.

[0030] In some embodiments, the seeds of the fragrant rice are sown between May 28 and May 31, and the seedlings are transplanted between June 29 and July 1; the variety of the fragrant rice is Yexiang Youyousi, 19xiang or Huaxia Xiangsi.

[0031] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0032] In the present invention, reference is made to “some embodiments”, “this embodiment”, examples, etc., which describe a subset of all possible embodiments, but it can be understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0033] If similar descriptions of "first / second" appear in the application documents, the following instructions are added. In the following description, the terms "first\second\third" are merely used to distinguish similar objects and do not represent a specific ordering of the objects. It can be understood that "first\second\third" can be interchanged in a specific order or sequence where permitted, so that the embodiments described herein can be implemented in an order other than that described herein.

[0034] In this embodiment, the term "and / or" is merely a description of the association relationship between associated objects, indicating that three relationships may exist. For example, object A and / or object B may represent three situations: object A exists alone, object A and object B exist at the same time, and object B exists alone.

[0035] The following are examples of the present application. The examples described below are exemplary and are only used to explain the present application, and should not be construed as limiting the present application. If no specific techniques or conditions are specified in the examples, the techniques or conditions described in the literature in the art or the product instructions are used. The reagents or instruments used without indicating the manufacturer are all conventional products that can be purchased commercially. The following examples or comparative examples are planted with Chinese fragrant silk.

[0036] Example 1

[0037] This embodiment provides a method for cultivating fragrant rice, comprising:

[0038] The seeds of fragrant rice are sown on May 18, and the seedlings are transplanted on June 17; the grain filling and fruiting period of fragrant rice is completed when the average daily temperature is 24℃ to 28℃; the planting density of the seedlings is 15,000 holes / 667m 2 ;

[0039] Field fertilizer management:

[0040] Before transplanting, nitrogen, phosphorus, potassium fertilizer and special fertilizer for rice fragrance are applied in the field; the mass ratio of nitrogen, phosphorus, potassium fertilizer and special fertilizer for rice fragrance is 1:0.3; the application amount of nitrogen, phosphorus, potassium fertilizer is 7.5 kg / mu; the mass ratio of nitrogen fertilizer, phosphorus fertilizer and potassium fertilizer in the nitrogen, phosphorus and potassium fertilizer is 1:0.5:0.6; the special fertilizer for rice fragrance, calculated by mass, includes 15% organic fertilizer, 24% urea, 50% superphosphate, 9% potassium chloride and 2% zinc sulfate;

[0041] Apply nitrogen fertilizer during the tillering stage of rice; the amount of nitrogen fertilizer applied is 2.5 kg / mu.

[0042] Example 2

[0043] This embodiment provides a method for cultivating fragrant rice, comprising:

[0044] The seeds of fragrant rice are sown on June 5, and the seedlings are transplanted on July 4; the grain filling and fruiting period of fragrant rice is completed when the average daily temperature is 24℃ to 28℃; the planting density of the seedlings is 15,000 holes / 667m 2 ;

[0045] Field fertilizer management:

[0046] Before transplanting, nitrogen, phosphorus, potassium fertilizer and special fertilizer for rice fragrance are applied in the field; the mass ratio of nitrogen, phosphorus, potassium fertilizer and special fertilizer for rice fragrance is 1:0.4; the application amount of nitrogen, phosphorus, potassium fertilizer is 8 kg / mu; the mass ratio of nitrogen fertilizer, phosphorus fertilizer and potassium fertilizer in the nitrogen, phosphorus and potassium fertilizer is 1:0.6:0.5; the special fertilizer for rice fragrance, calculated by mass, includes 13.5% organic fertilizer, 22% urea, 52% superphosphate, 10% potassium chloride and 2.5% zinc sulfate;

[0047] Apply nitrogen fertilizer during the tillering stage of rice; the amount of nitrogen fertilizer applied is 2.5 kg / mu.

[0048] Example 3

[0049] This embodiment provides a method for cultivating fragrant rice, comprising:

[0050] The seeds of fragrant rice are sown on May 30, and the seedlings are transplanted on June 30; the grain filling and fruiting period of fragrant rice is completed when the average daily temperature is 24℃ to 28℃; the planting density of the seedlings is 17,000 holes / 667m 2 ;

[0051] Field fertilizer management:

[0052] Before transplanting, nitrogen, phosphorus, potassium fertilizer and special fertilizer for rice fragrance are applied in the field; the mass ratio of nitrogen, phosphorus, potassium fertilizer and special fertilizer for rice fragrance is 1:0.3; the application amount of nitrogen, phosphorus, potassium fertilizer is 7.5 kg / mu; the mass ratio of nitrogen fertilizer, phosphorus fertilizer and potassium fertilizer in the nitrogen, phosphorus, potassium fertilizer is 1:0.5:0.5; the special fertilizer for rice fragrance, calculated by mass, includes 14% organic fertilizer, 22% urea, 52% superphosphate, 10% potassium chloride and 2% zinc sulfate;

[0053] Apply nitrogen fertilizer during the tillering stage of rice; the amount of nitrogen fertilizer applied is 2.5 kg / mu.

[0054] Example 4

[0055] This embodiment provides a method for cultivating fragrant rice, comprising:

[0056] The seeds of fragrant rice are sown on May 30, and the seedlings are transplanted on June 30; the grain filling and fruiting period of fragrant rice is completed when the average daily temperature is 24℃ to 28℃; the planting density of the seedlings is 16,000 holes / 667m 2 ;

[0057] Field fertilizer management:

[0058] Before transplanting, nitrogen, phosphorus, potassium fertilizer and special fertilizer for rice fragrance are applied in the field; the mass ratio of nitrogen, phosphorus, potassium fertilizer and special fertilizer for rice fragrance is 1:0.3; the application amount of nitrogen, phosphorus, potassium fertilizer is 7.5 kg / mu; the mass ratio of nitrogen fertilizer, phosphorus fertilizer and potassium fertilizer in the nitrogen, phosphorus and potassium fertilizer is 1:0.5:0.6; the special fertilizer for rice fragrance, calculated by mass, includes 15% organic fertilizer, 24% urea, 50% superphosphate, 9% potassium chloride and 2% zinc sulfate;

[0059] Apply nitrogen fertilizer during the tillering stage of rice; the amount of nitrogen fertilizer is 2.5 kg / mu;

[0060] Apply ear fertilizer during the ear-breaking stage of rice; spray on the leaves; spray the ear fertilizer on the leaves at 5-6kg / mu; the ear fertilizer, calculated based on a total mass fraction of 100%, includes 0.2% magnesium chloride, 0.6% zinc sulfate, 0.2% sodium selenite, 0.1% lanthanum chloride, and the rest is water.

[0061] Example 5

[0062] This embodiment provides a method for cultivating fragrant rice, comprising:

[0063] The seeds of fragrant rice are sown on May 30, and the seedlings are transplanted on June 30; the grain filling and fruiting period of fragrant rice is completed when the average daily temperature is 24℃ to 28℃; the planting density of the seedlings is 16,000 holes / 667m 2 ;

[0064] Field fertilizer management:

[0065] Before transplanting, nitrogen, phosphorus, potassium fertilizer and special fertilizer for rice fragrance are applied in the field; the mass ratio of nitrogen, phosphorus, potassium fertilizer and special fertilizer for rice fragrance is 1:0.3; the application amount of nitrogen, phosphorus, potassium fertilizer is 7.5 kg / mu; the mass ratio of nitrogen fertilizer, phosphorus fertilizer and potassium fertilizer in the nitrogen, phosphorus and potassium fertilizer is 1:0.5:0.6; the special fertilizer for rice fragrance, calculated by mass, includes 15% organic fertilizer, 24% urea, 50% superphosphate, 9% potassium chloride and 2% zinc sulfate;

[0066] Apply nitrogen fertilizer during the tillering stage of rice; the amount of nitrogen fertilizer is 2.5 kg / mu;

[0067] Apply ear fertilizer during the ear-breaking stage of rice; spray on the leaves; spray the ear fertilizer on the leaves at 5-6kg / mu; the ear fertilizer, calculated based on a total mass fraction of 100%, includes 0.2% magnesium chloride, 0.6% zinc sulfate, 0.2% sodium selenite, 0.1% lanthanum chloride, and the rest is water.

[0068] Example 6

[0069] This embodiment provides a method for cultivating fragrant rice, comprising:

[0070] The seeds of fragrant rice are sown on May 30, and the seedlings are transplanted on June 30; the grain filling and fruiting period of fragrant rice is completed when the average daily temperature is 24℃ to 28℃; the planting density of the seedlings is 16,000 holes / 667m 2 ;

[0071] Field fertilizer management:

[0072] Before transplanting, nitrogen, phosphorus, potassium fertilizer and special fertilizer for rice fragrance are applied in the field; the mass ratio of nitrogen, phosphorus, potassium fertilizer and special fertilizer for rice fragrance is 1:0.3; the application amount of nitrogen, phosphorus, potassium fertilizer is 7.5 kg / mu; the mass ratio of nitrogen fertilizer, phosphorus fertilizer and potassium fertilizer in the nitrogen, phosphorus and potassium fertilizer is 1:0.5:0.6; the special fertilizer for rice fragrance, calculated by mass, includes 15% organic fertilizer, 24% urea, 50% superphosphate, 9% potassium chloride and 2% zinc sulfate;

[0073] Apply nitrogen fertilizer during the tillering stage of rice; the amount of nitrogen fertilizer is 2.5 kg / mu;

[0074] Apply ear fertilizer during the ear-breaking stage of rice; spray on the leaves; spray the ear fertilizer on the leaves at 5-6kg / mu; the ear fertilizer, calculated based on a total mass fraction of 100%, includes 0.2% magnesium chloride, 0.6% zinc sulfate, 0.2% sodium selenite, 0.1% lanthanum chloride, and the rest is water.

[0075] The ear fertilizer, calculated based on a total mass fraction of 100%, includes 0.3% magnesium chloride, 0.4% zinc sulfate, 0.1% sodium selenite, 0.2% lanthanum chloride, and the rest is water.

[0076] The ear fertilizer, calculated based on a total mass fraction of 100%, includes 0.4% magnesium chloride, 0.8% zinc sulfate, 0.1% sodium selenite, 0.1% lanthanum chloride, and the rest is water.

[0077] Comparative Example 1

[0078] The difference between this comparative example 1 and embodiment 1 is that the sowing period is different, which is May 10; the time of transplanting the seedlings is different, which is June 9.

[0079] The fragrant rices of Examples 1-6 and Comparative Example 1 were harvested when the rice grains were 90% mature. The 2-AP content and yield were shown in Table 1.

[0080] Table 1 2-AP content and yield of aromatic rice in Examples 1-6 and Comparative Example 1

[0081] Group 2-AP content / (μg / kg) Yield (g / hole) Example 1 53.16 22.41 Example 2 54.23 22.52 Example 3 61.81 22.13 Example 4 71.33 23.17 Example 5 72.14 23.51 Example 6 72.01 23.36 Comparative Example 1 40.56 20.11

[0082] As can be seen from Table 1, the rice cultivated by the methods of Examples 1-6 has a high content of 2-AP, especially the rice cultivated by the cultivation methods of Examples 4-6 has a higher content of 2-AP. As can be seen from Examples 1-3, by controlling the sowing and transplanting time of rice seedlings, the average daily temperature during the grain filling and fruiting period of fragrant rice is between 24°C and 28°C to complete the grain filling, which can increase the aromatic substances of fragrant rice. As can be seen from Examples 4-6, further applying ear fertilizer during the rice ear breaking period can also significantly increase the content of 2-AP.

[0083] The effect of harvesting fragrant rice at different maturity on 2-AP was further studied. The fragrant rice of Example 1 was studied at maturity of 80%, 90% and 100%, harvesting was delayed by 5 days after maturity of 100%, and harvesting was delayed by 10 days after maturity of 100%. The content of 2-AP is shown in Table 2.

[0084] Table 2 Effect of maturity on 2-AP

[0085] Maturity 2-AP content / (μg / kg) 80％ 43.02 90％ 47.64 100％ 53.16 100% + 5 days 41.64 100% + 10 days 38.78

[0086] As can be seen from Table 2, different maturity levels have a greater impact on 2-AP in aromatic rice, and the 2-AP content in aromatic rice with a maturity of 90% is the highest.

[0087] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A method for cultivating aromatic rice, characterized in that: include: The seeds of fragrant rice are sown between May 15 and June 5, and the seedlings are transplanted between June 15 and July 5. The grain filling and fruiting period of fragrant rice is completed when the average daily temperature is 24℃ to 28℃. Field fertilizer management: Before transplanting, apply nitrogen, phosphorus, potassium fertilizer and rice fragrance fertilizer in the field; the mass ratio of nitrogen, phosphorus, potassium fertilizer and rice fragrance fertilizer is 1: (0.3-0.4); the application rate of nitrogen, phosphorus, potassium fertilizer is 7-8 kg / mu; Apply nitrogen fertilizer during the tillering stage of rice.

2. The method for cultivating aromatic rice according to claim 1, characterized in that: The planting density of the seedlings is 15,000 to 17,000 holes / 667m 2 .

3. The method for cultivating aromatic rice according to claim 1, characterized in that: The mass ratio of nitrogen fertilizer, phosphorus fertilizer and potassium fertilizer in the nitrogen-phosphorus-potassium fertilizer is 1:(0.5-0.6):(0.5-0.6); and / or, the special fertilizer for rice fragrance, calculated by mass, includes 10-20% organic fertilizer, 20-24% urea, 50-55% superphosphate, 9-11% potassium chloride and 2-3% zinc sulfate.

4. The method for cultivating aromatic rice according to claim 1, characterized in that: The amount of nitrogen fertilizer applied during the rice tillering stage is 2-3 kg / mu.

5. The method for cultivating aromatic rice according to claim 1, characterized in that: It is also included in the application of ear fertilizer during the rice ear bursting stage and spraying on the leaves; the ear fertilizer is sprayed on the leaves at a rate of 5-6kg / mu.

6. The method for cultivating aromatic rice according to claim 5, characterized in that: The ear fertilizer, calculated based on a total mass fraction of 100%, includes 0.2-0.4% of magnesium chloride, 0.4-0.8% of zinc sulfate, 0.1-0.2% of sodium selenite, 0.1-0.2% of lanthanum chloride, and the rest is water.

7. The method for cultivating aromatic rice according to claim 1, characterized in that: The seeds of fragrant rice are sown between May 28 and May 31, and the seedlings are transplanted between June 29 and July 1.

8. The method for cultivating aromatic rice according to claim 1, characterized in that: The varieties of the fragrant rice are Yexiang Youyousi, 19xiang or Huaxiaxiangsi.

9. The method for cultivating aromatic rice according to claim 1, characterized in that: Harvest when the rice is 90% mature.