【摘要】 建立了1个模拟叶面积指数动态变化的扩充的Logistic模型,利用禹城、沈阳的玉米叶面积指数(LAI)实测资料进行了拟合,结果表明,此模式是模拟叶面积指数随地理位置、品种、播期、密度变化的统一模型,对叶面积指数与积温间关系的分析,综合了不同地理位置、不同品种、不同播期、不同密度的叶面积指数资料,得到1条相对叶面积指数变化曲线,可反映特定区域作物叶面积指数的动态变化,也可用于区域作物产量模拟和遥感估产的研究。更多还原

【Abstract】 This paper reports an extended logistic model established to simulate the dynamic changes of leaf area index (LAI). The actual data of LAI of maize in experiments in Yucheng and Shenyang of China were used to fit the model. The results showed that this model is a uniform model simulating the change in LAI with geographic location, crop variety, sowing date and sowing density. A relative LAI curve was obtained through analyzing the relationship between LAI and cumulated temperature and colligating LAI data with different geographic locations, varieties, sowing dates and sowing density. This curve can reflect the dynamic changes of LAI in a given area and be used in regional crop yield simulation and remote sensing yield estimation.更多还原