An Optimized Approach to Shorten the Reproductive Period of Rice
In order to study the optimum method of shortening rice growth period under the field climate condi-tion of Sanya Nanfan.In this study,rice variety'SAAS-10'was used as the experimental material.Short sunshine,0.3％potassium dihydrogen phosphate,3000 times dilute 1.8％compound sodium nitrophenolate aqueous solution and their combination treatment were used to conduct the experimental treatment at 6.5 leaf age of rice plant,meiosis peak stage,late pregnancy and heading stage,respectively.The results showed that short-day treatment combined with sodium nitrophenolate and potassium phosphate had additive effect on promoting rice growth and development.Among them,spraying compound sodium nitrophenolate and potassium dihydrogen phosphate was the best way to shorten the rice growth period under the condition of short sunshine,which could advance the flo-rescence of rice by 10.4 d and shorten the growth period by 17.2 d.In addition,the treatment of short sunshine combined with spraying compound sodium nitrophenolate had the highest seed germination rate of 86.3％.In this study,an optimization method was established to shorten the rice growth period under the field climatic conditions of Sanya Nanfan,which will promote the rice breeding process.
RiceShort dayCompound sodium nitrophenolatePotassium dihydrogen phosphateShorten the growth period
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