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为了进一步发挥杂交水稻的杂种增产优势,近几年我们对我省目前推广的几个主要杂优组合的基本生育特性和栽培季节适应性进行了初步研究。1975年,通过对亲本和杂一代的熟期和优势表现的分析表明,杂一代一般均倾向于父本的熟期和丰产性状,表现中稻发育特性和较强增产优势。1976年,通过对不同播期下温度的自然变异,观察生育期、经济性状与温
In order to further enhance hybrid hybrids yield advantage, in recent years, we have carried out preliminary research on the basic reproductive traits and cultivation season adaptability of several major hybrid combinations promoted in our province. The analysis of the maturity and superiority of parents and hybrids in 1975 showed that the hybrid generation generally tended to have maturity and high yield traits in the male parent, indicating the developmental characteristics of middle-aged rice and strong yield-increasing advantage. In 1976, through the natural variation of temperature under different sowing dates, observation of growth period, economic traits and temperature