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水稻倒伏主要发生在灌浆后期。由于品种、栽培、管理、环境等方面的原因,水稻的茎秆支持力和机械强度降低,从而引起了倒伏。水稻倒伏能导致田间通风透光不良,光合作用减弱,稻谷籽粒不饱满,空秕粒率增加,死米、青米增多。一般在灌浆乳熟期发生倒伏对产量和米质影响最大,千粒重下降,垩白度增大,减产20%左右。分析水稻倒伏的原因,采取积极的防范措施,对促进农民增收增效,意义十分重大。
Rice lodging occurs mainly in the late filling stage. Due to varieties, cultivation, management, environment and other reasons, rice stems support and mechanical strength decreased, causing lodging. Rice lodging can lead to poor ventilation and light field, weakened photosynthesis, paddy rice is not full, increase the rate of empty pomfret, dead rice, green rice increased. Generally occurs in the grouting milky lodging has the greatest impact on yield and quality, grain weight decreased, chalkiness increased, about 20% reduction. Analysis of the causes of rice lodging, to take active preventive measures to promote farmers income and increase efficiency, is of great significance.