水稻南繁部分小样品灌浆不实的原因分析

Reasons of Rice Imperfect Filling in Some Small Samples Reproduced in South of China

通过试验 ,对水稻南繁部分小样品灌浆不实现象进行了观察分析 ,指出造成这一现象的原因是这些小样品的抽穗期正好与当地稻绿蝽第一代的孵化期相吻合 ,刚孵出的稻绿蝽若虫聚集在小样品的稻穗上 ,刺吸刚开始灌浆的谷粒 ,造成米胚坏死而不能形成饱满谷粒。

Through experiments the phenomena of rice imperfect filling in some small samples reproduced in south of China were observed and analyzed, which showed the reason that rice heading period was identical with incubation period of first generation of rice green stink bug in some small samples. Their nymph concentrated on rice ears, stung and absorbed the filling grains, then rice embryo died and was not able to form perfect filling grains. Therefore, some corresponding prevention countermeasures were suggested.