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本试验结果表明:亚种间杂交稻比品种间杂交稻灌浆达到峰值的时间要长、峰值要小、启动灌浆晚;亚种间杂交稻强、弱势粒异步灌浆特性比品种间杂交稻更明显.亚种间杂交稻籽粒含水率大于品种间杂交稻;籽粒灌浆速率最大时,杂交稻籽粒含水率为50%～57%,但强势粒该值大于弱势粒.杂交稻灌浆的临界含水率为25%左右.另外,对提高亚种间杂交稻籽粒灌浆能力进行了讨论.
The results showed that the intersubspecific hybrid rice had longer time to peak filling, lower peak value and late grain filling than the intersubspecific hybrid rice. The asynchronous and inferior grains of intersubspecific hybrid rice were more obvious than those of hybrid rice The grain moisture content of inter-subspecific hybrid rice was higher than that of hybrid rice with the highest grain-filling rate, while the grain weight of hybrid rice was 50% -57%, but the value of strong grain was higher than that of inferior grain.The critical moisture content of hybrid rice was 25% or so.In addition, we discussed the improvement of grain filling ability of inter-subspecific hybrid rice.