中文摘要：

以超级杂交稻、普通杂交稻、常规稻各2个品种（组合）分2个播期进行试验,探讨水稻群体光能辐射利用率与产量的关系。结果表明：同一播期,超级稻产量最高;5月22日播种的超级稻产量与普通杂交稻和常规稻差异显著,且产量都高于6月17日的,超级稻产量最高的原因是有较高的颖花量。6月17日播种的水稻群体光能辐射利用率比5月22日的高。超级稻群体光能辐射利用率最大。播期1,水稻群体光能截获率与结实率呈显著负相关,从孕穗期到齐穗期与粒重呈极显著正相关,与穗数、穗粒数、产量及收获指数不相关;播期2,水稻群体光能截获率与结实率只在分蘖中期和齐穗期呈显著负相关,与穗数、穗粒数、粒重、产量和收获指数均无显著相关性。

英文摘要：

Three types of rice varieties including supper hybrid rice,hybrid rice and conventional rice were used to explore the relationships between radiation use efficiency（RUE） and grain yield.The results showed as follows.Grain yield of super hybrid rice was higher than hybrid rice and conventional rice on the same sowing date,and there was a significant difference among three types of rice varieties sowing May 22.And grain yield sowed in May 22 was higher than sowed in July 17.There was higher grain yield of super hybrid rice because of high spikelet numbers.Grain yield sowed in May 22 was higher than sowed in July 17.There was higher radiation use efficiency of super hybrid rice.There was a significant negative correlation between RUE and the filled ratio during rice growth and development sowing May 22,and a significant positive correlation between RUE and 1 000-grain weight from booting to head-flowering,but RUE was not related to the other indices,including the number of spikelet,grain yield and harvest index;there was a significant negative correlation between RUE and the filled ratio on the MT and FL sowing July 17,and were no significant trend among RUE and the other indices,such as the number of spikelet,grain yield and harvest index.