阴害影响水稻产量的机制及其调控技术Ⅲ水稻不同品种对阴害反应的差异  

Mechanism of Insufficient Illumination on Rice Yield and its Control Technology ⅢThe Difference of the Response to Insufficient Illumination among Different Rice Cultivars

作　　者：李林[1] 张更生[1] 

机构地区：[1]江苏省农业科学院现代化研究所

出　　处：《中国农业气象》1994年第6期1-6,共6页Chinese Journal of Agrometeorology

基　　金：国家自然科学基金

摘　　要：通过水稻４种类型代表品种对模拟阴害的反应，阐明了水稻分蘖期间不同品种受到同等程度的阴害处理后，生育期较长的两个粳稻品种穗数减少的比例小，其减产率显著小于两个杂交稻组合；而营养生长期长的晚粳稻品种受阴害后减穗率又小于中粳稻品种，其减产比例也比中粳品种小得多。不同品种在相同弱光下开花灌浆结实，其弱光对产量的影响应视各品种的结实率受危害程度而异。亚优２号与汕优６３两个杂交组合的结实率，分别比对照下降２８．９％和２６．５％，它们的减产率分别比两个粳稻品种约高６％～４％和９％～７％。由此可见，不论是水稻分蘖期间或是开花灌浆期间受阴害，粳稻品种的受害程度轻于籼稻品种（或组合）；晚粳稻品种又轻于中粳稻品种。The difference of the response to insufficient illumination among different rice varietal types isilluminated in this paper,with four representative cultivars Sanyo 63＃(i.×),Yayou2＃(i.×j．)Zhendao 1＃(medium j.)and Wjuyujing 2＃(late j.)After trcated with the disaster of the same degree in tillering phase,the two japonica cultivars with longer growth duration had smallerdecrease rates in panicle number and yield than the two hybrid ones.Within the japonica cultivarsthe losses of panicle number and yield of the late one were much lessthan those of the medium one.Theinfluence of low light in flowering-filling period on yields of different rice varieties changed as its effect on their full grain percentages did.The yield loss rates of Yayou 2＃and Sanyou 63,whose the full grain percentages were 28.9％and 26.5％lower than their own contrast ones,were 4～6％and 7～9％higher than those of the two japonica culttvars，respectlvely，Therefore，lnslIfflcientillumination no matter in tillering or flowering-filling period impairs j. rice cultivars in a smallerdegree than it harms i. ones,while among j. ones,impaired degree of late ones is smaller than medium ones.

关 键 词：水稻 品种 气象灾害 阴害 反应差异 

分 类 号：S435.111.3[农业科学—农业昆虫与害虫防治] S426[农业科学—植物保护]