不同产量水平小麦最适叶面积指数动态模拟模型研究

Studies on Dynamic Simulation Models of Optimum Leaf Area Index of Wheat under Different Yielding Levels

根据最适叶面积定义和小麦栽培优化原理建立了不同产量水平小麦最适叶面积指数动态模拟模型,经用南京与济南地区气象、品种及试验资料验证,两地点、两品种最适叶面积指数测定值与模拟值间相关系数、差值标准误及平均绝对误差分别为0.9761和0.9620、0.5891和0.7094以及0.12和0.43,相关性达极显著水平,证明所建模型可行。所建模型可以利用当地常年气象资料(30年平均值,如月平均气温、月平均最高和最低气温以及月日照时数、纬度),确定不同地区、产量水平与品种最适叶面积指数动态,为小麦数字化栽培提供科学依据。

Simulation models were established to describe the optimum leaf area index（LAI） during wheat growth and development based on the rules for wheat cultivation-optimization and the optimum leaf area definition. The models were validated with adopting local weather（average temperature per month, average maximum temperature per month, average minimum temperature per month, sunlight times per month, and latitude）, varieties, and experiment data from different yielding levels in Nanjing and Jinan areas, the correlation coefficient, standard error of absolute deviation, and average absolute deviation between the observed and the stimulated were 0. 9761 and 0. 9620 with 0.01 significant level, 0. 5891 and 0. 7094, and 0. 12 and 0. 43, respectively.