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以每天的太阳辐射、气温、降水等气象要素为驱动变量,建立了棉花生长发育、形态发生及产量形成的动态模拟模型.模型可在潜在生产条件和水分限制条件两个层次上运行,干物质在各器官间的分配系数作为发育期的函数.利用太阳辐射、叶面积指数、植株干重等来计算净光合产物或干物质积累.模型根据温度对出叶速率的影响及顶芽、腋芽分化的同伸关系,模拟和预测主茎叶数、果枝数、果节数、蕾铃的发生,并从碳水化合物营养供求状况和降水强度来控制蕾铃脱落.利用蒸腾/同化比率来确定水分胁迫对植株总干物质增长的直接影响和对蕾铃脱落的间接影响.该模型对棉花生产管理决策、产量潜力预测、环境胁迫效应及病虫害防治的研究均有较大的意义.
Based on daily solar radiation, air temperature and precipitation as the driving variables, a dynamic simulation model of cotton growth and development, morphogenesis and yield formation was established.The model can be operated at two levels of potential production conditions and moisture constraints, and dry matter The partition coefficient between organs was used as a function of developmental period.The net photosynthetic products or dry matter accumulation were calculated by using solar radiation, leaf area index, plant dry weight, etc. The effects of temperature on the leaf emergence rate and the differentiation of apical buds and axillary buds , The number of stems and leaves, the number of fruit branches and the occurrence of buds were simulated and predicted, and the fall of the buds was controlled by the supply and demand of carbohydrates nutrition and the intensity of precipitation.The water use of the transpiration / assimilation ratio was used to determine the water stress The direct impact on the growth of total plant dry matter and the indirect impact on the shedding of the buds.This model has a great significance for cotton production management decision-making, yield potential prediction, environmental stress effects and pest control.