Research On Chemical Regulate Control Technique In Hybrid Rice Seed Production

To improve the seed production and seed quality of hybrid rice, taking potash fertilizer, full-fat nutritional ecology fertilizer, "Jinke La", lifengning and materialized products as testing material, in the experiment of regulating the seed production of hybrid rice, we examined parental outcrossing characteristics, degree of flowering met, yield components, seed quality and storage characteristics of appearance, germination characteristics, and accessed to the following main results:1, Increasing potash fertilizer during VI differentiation of young ear of female Fengyuan A will prolong its heading and flowing period. On the basis of increasing 4-8 percentage of female fertility rate, the outcrossing rate without potash fertilizer is 37.96%, after increasing potash fertilizer, the outcrossing rate improve 3-6 percentage,25kg increased per mu yield.2, Spraye "Jinke La" 100,200,300 g per mu at the initial heading stage of the female Fengyuan A, the exposed stigma improve 6.34%,8.90%, 15.78% separately on the basis of 58.77%; outcrossing rate improve 4.74%,7.05%,8.03%; seed split rate descend 3.08%,5.03%,6.19% separately.3, T98A, spraying "Lifeng Ling" in the 8.1 leaf stage lead to most prominent effect of plant dwarfing, in the 10.1 leaf stage lead to good effect of plant dwarfing and reduced internodes and better effect of the control of lodging, and have little effect on total grains per panicle, grains, seed set, production rate is more stable. spraying "Lifeng Ling" in the 11.1 leaf stage lead to little effect of plant dwarfing.4, Spraying MET 100～160g per 667m2 in the jointing stage of strain 1S can reduce the plant height significantly, reduce down four, down three lengths, increase down four, down three stem diameter and down three stem wall thickness, increase the bending force and lower the lodging index.5, Spraying silicon fertilizer 500～1000g per 667m2 in the jointing stage of strain 1S can reduce the plant height significantly, reduce down four, down three, down one lengths, increase down four, down three stem diameter and down three stem wall thickness, increase the bending force and lower the lodging index.6, Spraying MET100,200g per mu in the seed milk stage of "Lu liangyou 996" can increase the 1000-seed weight, within one month after harvest, the germination rates are 87.4% and 81.9% sparately;300g per mu reduce the 1000-seed weight, but reduce the grain split rate, germination rate is only 75.4%.Paclobutrazol sprayed amount of seed storage of three months,87% germination were more than the control seeds (89.0%) was not significantly different; more than 90% germination rate, germination index was significantly lower than the control seeds, the amount of to 100,200 g of seed germination rate (potential) has little effect on seed germination spraying 300g significantly inhibited the rate of inhibition in a certain period of storage with the storage period extended gradually weakened, not affect the storage characteristics of seeds and planting quality.