Effects of nighttime temperature increase on the yield of double season rice
夜间温度升高对双季早晚稻产量的影响
WEI Jinlian,
PAN Xiaohua,
DENG Qianghui Key Laboratory of Physiology,
Ecology,
Cultivation of Double Cropping Rice,
Ministry of Agriculture/ Key Laboratory of Crop Physiology,
Ecology,
Genetic Breeding,
Ministry of Education/Jiangxi Agricultural University,
Nanchang Jiangxi,
China,
魏金连,
潘晓华,
邓强辉
Keywords: double-season rice(O,sativaL,),nighttime temperature increase,yield and its components,tiller,spikelets differentiation and abortion
双季水稻,夜温升高,产量与产量构成,分蘖,颖花分化与退化
Abstract:
温度是影响水稻生长发育的重要因素，但夜间温度升高对双季水稻产量的影响还不清楚。利用两间玻璃室内夜间不同的温度条件,研究了水稻生长期间夜温升高对双季早、晚稻产量的影响。结果表明，夜间最低温度每升高1℃早稻产量降低542%-9.48%，而夜间最低温度每升高1℃晚稻产量提高8.99%-11.28%。夜温升高有利于早、晚稻的分蘖，增加有效穗数，但不利于颖花分化，使每穗粒数减少；夜温升高使早稻结实率下降，但提高晚稻的结实率。
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