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A special plant growth regulator for large panicle rice, its preparation method and application

A technology of panicle type and rice, which is applied in the direction of plant growth regulators, plant growth regulators, botanical equipment and methods, etc. It can solve the problems of low seed setting rate of large panicle type rice varieties, difficult to exert yield potential, and limited yield increase potential, etc. , to improve rice quality, reduce high temperature or low temperature or drought stress damage, increase seed setting rate and 1000-grain weight

Active Publication Date: 2017-01-18
CHINA NAT RICE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Rice farming practice in the past ten years has proved that the selection and research of large spike (heavy spike) type rice varieties (combinations) and their high-yield cultivation techniques will be the main direction of research to improve rice yield in the future. However, large spike type rice varieties (combinations) There is a problem that the seed setting rate is generally low (that is, the obstacle of grain filling), which seriously limits the potential of increasing production
[0003] In the past, there are two technical measures to solve the above problems: (1) Applying granular fertilizers, such as applying N fertilizer after flowering of rice, but the effect and danger coexist, such as improper application of N fertilizer, causing diseases and lodging, but reducing production
It is also possible to apply phosphorus fertilizer (top dressing outside the root), but the effect is not stable
(2) The application of plant hormone abscisic acid (ABA) has some effects, but the price of ABA is high, the increase in production does not increase income, and ABA is easy to photolyze, the effect is unstable, and the research results have not entered the market
[0004] Hybrid rice, especially subspecies hybrid rice, has obvious growth advantages and yield advantages, but due to the low seed setting rate, the yield potential is not easy to realize

Method used

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  • A special plant growth regulator for large panicle rice, its preparation method and application
  • A special plant growth regulator for large panicle rice, its preparation method and application
  • A special plant growth regulator for large panicle rice, its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Mix 1.5 parts by mass of gibberellin and 1 part by mass of uniconazole uniformly to obtain a mixture of active ingredients;

[0034] Mix 5 parts by mass of wetting agent sodium butylnaphthalene sulfonate, 5 parts by mass of dispersant HK-2302 and 87.5 parts by mass of light calcium carbonate to obtain an auxiliary material mixture;

[0035] The active ingredient mixture and the auxiliary material mixture are uniformly mixed to obtain a wettable powder.

Embodiment 2

[0037] Carry out the experiment according to the time, place and rice variety shown in Table 1: apply the wettable powder provided by Example 1 at the beginning of ear to the full ear of rice, spray 30 grams evenly per mu, and the amount of liquid medicine is 45 liters / mu , foliar spray. The results are shown in Table 1. In Table 1, uniconazole is treated as 0.3 g / mu uniconazole active ingredient (i.e. 1% of 30 gram preparations), and gibberellin is treated as 0.45 g / mu gibberellin active ingredient (i.e. 30 g 1.5% of the preparation).

[0038] Table 1 Effect of rice application on yield increase

[0039]

[0040] In Table 1, the unit of area is mu, and the unit of output is kg / mu.

[0041] It can be known from Table 1 that the application of the plant growth regulator provided in Example 1 increases the yield of different rice varieties in different counties and cities in Zhejiang Province by 6% to 12%.

Embodiment 3

[0043]

[0044] The quality of the rice obtained from Zhongzheyou 1 planted in Jinhua area and the rice obtained from Chunyou 84 planted in Fuyang City in Example 2 was tested, and the results are shown in Table 2.

[0045] Table 2 Effects of plant growth regulators on rice quality

[0046]

[0047] As can be seen from Table 2, the special plant growth regulator for large spike type rice provided by the present invention improves the appearance quality of rice, especially the transparency of rice is significantly improved, and the chalky grain rate is significantly reduced.

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Abstract

The invention provides a special plant growth regulating composition for large panicle rice, which consists of gibberellin and uniconazole. The invention also provides a special plant growth regulator for large panicle rice, which comprises gibberellin, uniconazole and auxiliary materials. The invention also provides the preparation method and application of the plant growth regulator. In this application, gibberellin and uniconazole are used in combination. One is to adjust the "intergranular apex dominance", which not only maintains the filling conditions of the "strong grains" of rice grains, but also improves the filling conditions of the "weak grains"; Physiological activity of the root system during the filling and maturation period improves the photosynthetic efficiency of the flag leaf and other functional leaves, and the two synergize. When used in large panicle rice, it can increase its seed setting rate and thousand-grain weight, thereby increasing rice yield and quality. Experimental results show that the plant growth regulator provided by the invention can not only increase the yield of rice by 6% to 12%, but also improve the appearance quality of rice, especially significantly improve the transparency of rice, and significantly reduce the chalky grain rate.

Description

technical field [0001] The invention belongs to the technical field of plant growth regulators, and in particular relates to a plant growth regulator for large spike rice, a preparation method and application thereof. Background technique [0002] Rice farming practice in the past ten years has proved that the selection and research of large spike (heavy spike) type rice varieties (combinations) and their high-yield cultivation techniques will be the main direction of research to improve rice yield in the future. However, large spike type rice varieties (combinations) There is the problem that the seed setting rate is generally low (that is, the obstacle of grain filling), which seriously limits the potential of increasing production. [0003] In the past, there are two technical measures to solve the above problems: (1) Applying granular fertilizers, such as applying N fertilizer after flowering of rice, but the effect and danger coexist, such as improper application of N f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N43/653A01N25/14A01P21/00A01N43/12
Inventor 陶龙兴符冠富陈婷婷杨永杰张彩霞杨雪芹赵霞
Owner CHINA NAT RICE RES INST
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