【摘要】 根据国家“86 3”节水农业专项子课题现场试验资料 ,分析了控制灌溉和常规灌溉条件下水稻茎蘖动态变化、株高变化以及叶面积变化趋势 ,建立了两种灌溉条件下茎蘖消长的Logistic模型和叶面积增长模型 ,并对水稻冠层受光结构进行了分析。结果表明 ,控制灌溉通过对土壤水分的合理调控 ,使得无效分蘖减少 ,提高了水分和养分的有效利用率 ;在大部分生育期内水稻保持了较适宜的冠层叶面积指数 (CLAI) ,具有良好的株型 ,能更多的截获太阳能 ,奠定了水稻节水灌溉条件下水稻高产的基础更多还原

【Abstract】 Rice tiller dynamic development, plant height and leaf area development under controlled irrigation and traditional irrigation were analyzed. Logistic model for simulating tiller development was developed, and polynomial model was used to describe leaf area development.Moreover, rice population structure and light distribution were analysed.The rusults indicated that invalidate tillers decreased and the efficiency of water and nutrient increased under the controlled irrigation, which could adjust water layer and soil moisture in paddy fields. The appropriate leaf area index and the good plant type remained in most of growing stages, which could be helpful to intercept more light and have high yield.更多还原