摘要
根据５年田间试验资料，分析了棉花产量与耗水量的抛物线关系，确定了棉花最佳耗水量；根据棉花植株在不同土壤湿度情况下气孔阻力、蒸腾强度和蕾铃脱落率的变化，确定了不同生育阶段的适宜水分指标和干旱指标．在此基础上，研制了棉花灌溉随机控制模型，可以动态预报棉田土壤有效水分含量和实际蒸散量，并从经济效益和水分利用效率的角度提出优化灌溉决策．
Based on experimental data for 5 years,the parabolic relations between cotton yield and water consumption are analysed,and the optimal water consumption for cotton is determined. According to the variations of stoma resistance,transpiration of leaves,abcission of squares and bolls in different soil moistures,the suitable soil moisture and drought indices in different stages of cotton are decided. The stochastic control model of irrigation for cotton could be used to predict dynamically effective soil water content and actual evapotranspiration of cotton and make the decision aiming at obtaining maximum economic benefit and water utilization efficiency.
出处
《应用气象学报》
CSCD
北大核心
1998年第4期417-424,共8页
Journal of Applied Meteorological Science
关键词
棉花
耗水量
水分指标
灌溉
随机控制
Cotton Water consumption Water index Irrigation Stochastic control
