摘要
研究了超级杂交稻准两优527、两优0293在3种不同的施硅水平下生育后期的抗倒伏能力、抗倒形态及生理性状指标变化情况,结果表明:施硅对提高超级杂交稻的抗倒伏能力作用明显,其中以施用中量硅肥的处理(施五水偏硅酸钠300kg/hm2)效果较好;两优0293的抗倒伏能力在各时期均明显强于准两优527;超级杂交稻生育后期随生育进程的后移,单株抗折力明显下降,倒伏指数明显上升,降低株高、单株生物量和茎鞘物质输出率,增加茎鞘干重有利于提高超级杂交稻生育后期的抗倒伏能力,降低倒伏风险。
The lodging resistance and its related morphological and physiological characters in later growth stages of super hybrid rice were studied under three applying dosages （S1： 150 kg/hm2, S2：300 kg/hm2, S3：450 kg/hm2 ） of silicon fertilizer （ Na2SiO3 ·5H2O） with Zhunliangyou 527 （ B1 ） and Liangyou 0293 （B2） as the materials. The results showed that applying silicon fertilizer had an apparent effect on improvement of lodging resistance of super hybrid rice. Among three dosages, the medium one had the best effect. Compared with Zhunliangyou 527, Liangyou 0293 had a much better lodging resistance in all tested growth stages. From milk stage to ripening stage, the lodging resistance force of super hybrid rice decreased but their lodging index increased gradually. Decreasing plant height, biomass and dry matter translocation rate from stem and sheath or increasing dry matter weight of stem and sheath would be favorable to improving lodging resistance and lowering lodging risks in later growth stages of super hybrid rice.
出处
《杂交水稻》
CSCD
北大核心
2009年第1期56-61,共6页
Hybrid Rice
基金
国家粮食丰产工程项目(2004BA520A01)
关键词
超级杂交稻
抗倒性
硅肥
super hybrid rice
lodging resistance
silicon fertilizer
