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试验于1987～1990年在扬州进行。以汕优63和盐粳2号为材料。采用施肥量、栽培密度等不同因素处理。塑造抽穗期不同的单茎茎鞘重和叶面积指数的群体。结果表明:水稻抽穗期单茎茎鞘重与植株性状(比叶重、消光系数、穗粒数等)、群体粒叶比、经济系数等均呈极显著的线性正相关,与抽穗期叶面积指数呈二次曲线关系,与抽穗后叶面积衰减速度呈显著负相关。在最适叶面积指数相近时。单茎茎鞘重高的群体,最适叶面积指数保持时间长,抽穗后的光合势和净同化率高,产量提高。因而塑造一个抽穗期叶面积指数适宜,单茎茎鞘重高的群体是水稻超高产的途径。
The experiment was carried out in Yangzhou from 1987 to 1990. Shanyou 63 and Yanjing 2 were used as materials. Fertilizer use, planting density and other factors to deal with. Shaping the heading date of different single stems sheath weight and leaf area index of the population. The results showed that there was a significant linear positive correlation between the stem-sheath weight and plant traits (specific leaf weight, extinction coefficient, number of grains per spike), grain-leaf ratio and economic coefficient of rice at heading stage, The index showed a quadratic curve with a significant negative correlation with the decay rate of leaf area after heading. When the optimum leaf area index is similar. The stems and scabs of single stems were the highest, the most suitable leaf area index was maintained for a long time, the photosynthetic potential and net assimilation rate after heading were high, and the yield was increased. Therefore, it is a way to create a group with suitable leaf area index at heading stage and high stem-sheath weight of single stem.