【摘要】 为了探索再生稻的超高产特性,以超级杂交水稻组合Ⅱ优航1号为供试材料,调查了再生稻超高产的库源结构特征,结果:在产量4个构成因素中,头季以每穗粒数的变异最大(12.1%),与产量的相关最密切(r=0.8133**);再生季却以每平方米穗数的变异最大(14.6%),与产量的相关最密切(r=0.8279**)。再生稻超高产的库特征是具有较大的库容量。再生稻的产量限制因素,头季是每穗粒数,再生季是每平方米穗数。再生稻超高产的源特征是必须积累高额的生物产量。头季要实现超高产,必须注重在中期培育面积适当较大、姿态直立的冠层叶片,以提高中后期的群体生长率;再生季则必需依靠萌发更多再生分蘖,来扩大群体叶面积,大幅度积累干物质。更多还原

【Abstract】 In order to investigate the super-high yield characteristics in ratoon rice,the research was carried out to study the high yield characteristics of source and sink in super rice eryouhang NO. 1. The results showed that in four yield components,the variation of total spikelets per panicles was the most and the relationship (r=0.8133) was significant between total spikelets per panicles and yield in main rice. But in ratoon rice,the variation (14.6%) of total panicles per square meters was the most and the relationship (r=0.8279) was significant between panicle per square meters and yield. A bigger sink was occupied for the high yield ratoon rice. These results indicated that the limiting factors of yield were spikelets per panicle in main rice and the panicle per square meters in ratoon rice. More biomass was the feature of source for super high yield ratoon rice. The results showed that it was necessary for high yield in main rice to foster big and erect leaf of canopy and keep the function of root and leaf in the late stage for improving population growth rate. It was necessary for high yield in ratoon rice to enlarge leaf area of population depending on fostering more second tillers and accumulate more dry matters.更多还原