遥感信息结合植物光合生理特性研究区域作物产量水分胁迫模型

A Study of Region Crop Yield Model influenced by Water Deficit Based on Remote Sensing Information and Crop Photosynthetic Physiological Characteristic

首先给出利用遥感信息结合作物光合生理特性研究作物产量水分胁迫模型的一般性概念，然后论述作物产量水分胁迫模型中作物蒸散和光合作用的关系。建立以作物蒸散为显参的作物产量水分胁迫模型；对模型的参数给出求解公式，利用遥感信息反演模型参数。最后利用发展的作物产量水分胁迫模型对华北平原典型区进行作物产量填图，将本模型与作物产量经验模型的１９９７年计算结果进行比较，发现本文发展的模型有可比的精度。

Crop water deficit is an important sensitive factor affecting crop evapotranspiration, crop photosynthetic rate and hence its yield. In this study, first the concept model of crop yield influenced by water deficit is analyzed. Then the developed model is established based on the remote sensing information from NOAA-AVHRR, in combination with crop photosynthesis characteristics and meteorologi- cal data. Tile crop evapotranspiration is recognized as the explicit parameter in the formula, the partial parameters used to calculate crop photosynthesis and crop yield for the developed models are derived from remote sensing information. Third the distribution of estimating winter wheat yield in the North China Plain had been shown using the developed model. The calculated results had been compared between the developed model and the former model in the same region, and it is found that the developed model (RSPWBM) has a relatively better precision.