关键词: 生物有机肥, 生物有机肥, 土壤, 烤烟, 常规成分

Abstract:

The significance of modern safe seed breeding and hybrid seed production of two-line hybrid rice were discussed, the high fertility conversion temperature, “genetic drift”, the selection of seed production bases, the unreasonable arrangements of seed production seasons and the unstable output of TGMS line reproduction were the major problems existed in the safe seed breeding and production of two-line hybrid rice which were proposed in this paper. The selection of practical TGMS line, the strengthen of “core seed” production and using the principle of “low temperature breeding and effective temperature accumulation” were specified, which were used to security high-yield breeding of two-line hybrid rice. The weather decision support system of hybrid seed production base was based for effective chosen the hybrid seed production base and the production time which was the main technical measurements for solving the problems above.