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Method for regulating seed production flowering phase of japonica rice

A japonica rice and flowering period technology, applied in the field of japonica rice seed production flowering period adjustment, can solve the problems of non-meeting of flowering period, unsatisfactory meeting, prolongation of growth period, etc., achieve reasonable population structure and flowering amount, solve the difficult adjustment of flowering period, and have good effect Effect

Active Publication Date: 2013-11-27
云南金鼎禾朴农业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the production of hybrid rice seeds, it is not accurate enough to arrange the sowing time of the parents according to the total number of leaves on the main stem of the parents and the time from sowing to the first ear, so as to achieve the flowering of the parents.
During the growth and development of the parents, due to the influence of many factors such as parental characteristics, climatic conditions, soil conditions and artificial cultivation management measures, the growth period will be prolonged or shortened, which will change the originally expected flowering period, resulting in the flowering period not meeting or meeting. not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The test was set up in the Dianza 35 (combination: Hexi 42A / South 34) farming field in Zhemeng Base, Jingdong County, and the same field was used for comparative experiments. The male parents were sprayed with 5 grams of "920" and "920" without spraying. 20" as a control for two treatments. It is predicted that the heading and flowering of the male parent will be 3 days faster than that of the female parent during the young panicle differentiation period. In this plant, the heading and flowering time of the male parent was delayed or the ear buds came out but did not bloom temporarily. The male parent that was not sprayed with "920" was used as a control. The result was that the male parent sprayed with 5 grams of "920" flowered 3 days later than the control , the effect of regulating the flowering period is obvious.

Embodiment 2

[0013] The experiment was set up in the Dianza 35 (combination: Hexi 42A / South 34) planting field in Zhemeng Base, Jingdong County, and the same field was used for comparative experiments. The female parent was sprayed with 10 grams of "920" and "920" without spraying per mu. 20" as a control for two treatments. During the young panicle differentiation period, it is predicted that the heading and flowering of the female parent is 6 days faster than that of the male parent. In this plant, the time of heading and flowering of the female parent was delayed or the ear buds came out but did not bloom temporarily. The female parent that was not sprayed with "920" was used as a control. The result was that the female parent sprayed with 10 grams of "920" flowered 6 days later than the control , the effect of regulating the flowering period is obvious.

Embodiment 3

[0015] The experiment was set up in the Dianza 36 (combination: Hexi 42A / South 36) farming field in Jinggu Base, and the same field was used for comparative experiments. The male parent was sprayed with "920" 6 grams per mu and "920" was not sprayed. Compare the two treatments. It is predicted that the heading and flowering of the male parent will be 4 days faster than that of the female parent during the young panicle differentiation period. In this plant, the heading and flowering time of the male parent was delayed or the ear buds came out but did not bloom temporarily. The male parent that was not sprayed with "920" was used as a control. The result was that the male parent sprayed with 6 grams of "920" flowered 4 days later than the control , the effect of regulating the flowering period is obvious.

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Abstract

The invention discloses a method for regulating a seed production flowering phase of japonica rice, relating to the technical field of agriculture planting. According to the technical method disclosed by the invention, plant growth regulators of different dosages are sprayed according to different ear differentiation periods, so that parent flowering phases are promoted to be synchronized, and further, the seed production yield increases. The method is simple, is easy to operate, has a good effect of regulating the flowering phase, and has no negative effect to seed production parents. The normal growth and development of the seed production parents is prevented from being influenced by excessively applying a nitrogen fertilizer or excessively spraying a plant growth regulator and the like when the flowering phase is regulated in the earlier phase, the balance growth of the parents in a seed production rice field is ensured to make the parents have reasonable group structures and sufficient spikelets, the flower synchronization of the parents is fully ensured, the dosage of chemical fertilizers and pesticide is reduced, the production cost is lowered, the difficulty in regulating the flowering phase after ears of the seed production parents differentiate is effectively overcome, and the purposes of increasing the outcrossing rate of a female parent and increasing the seed production yield are achieved finally.

Description

technical field [0001] The invention relates to the technical field of agricultural planting, in particular to a method for regulating the flowering period of japonica rice seed production. Background technique [0002] The application of plant growth regulators in hybrid rice seed production is the most common and critical technology. Spraying plant growth regulators at the heading stage is an important measure to improve the seed setting rate of hybrid rice seed production, and is of great importance to increase the yield of seed production. role. Spraying plant growth regulators can remove the necking phenomenon of the sterile line, increase the rate of grain exposure, make most of the spikelets pollinate, increase outcrossing and fruiting; make the parent plants grow taller to varying degrees, and loosen the female panicles. layer, improve the transmission efficiency of male parent pollen between the female parent panicle layers; it can advance the female parent's flowe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02
Inventor 安华刘贤芳程贤宇板自兵王存李明声周永玲
Owner 云南金鼎禾朴农业科技有限公司
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