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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宄。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、经济性状与温度的关系,证实了上述的初步分忻,并表明这些组台作为二晚栽培的季节适应性也较大,丰产性也较好,具有极有利的高产内因条件。随着二晚杂优的速迅发展,由于目前种植的主要组合的基本营养生长性较大,播栽要求较严,秧龄问题就显得特别突出。所以,1977年,着重试验了在(?)晚播期下,不同秧龄对季节适应性与经(?)状的影响。现将试验结果总结于下。
In order to further enhance hybrid hybrid yield advantage, in recent years, we promote the province of several major hybrid combinations of basic fertility characteristics and cultivation of the season to conduct a preliminary study of adaptability. 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, observing the relationship between growth period and economic traits and temperature, we confirmed the above preliminary analysis and showed that the adaptability of these groups as the second-night cultivation was also larger, High yield is also better, with very favorable high-yielding internal conditions. With the rapid development of Gazelle late in the year, due to the major vegetative growth of the main planting planted nowadays and the strict requirements of planting, the issue of the seedling age is particularly outstanding. Therefore, in 1977, we focused on the effects of different seedling ages on the seasonal adaptability and translocation under the late sowing date (?). The test results are summarized below.