基于遥感技术的气象因素变化影响水稻单产定量研究

以黑龙江省五常市为研究区域，应用在水稻移栽期至成熟期选择的系列MODIS影像反演NDVI，通过NDVI间接反演LAI，并逐日拟合水稻全生育期的LAI，结合SIMRIW模型，计算研究区域2006年低温影响下的水稻单产。经演算，水稻单产值为5411．74kg／hm^2，是实际值的84％。研究结果表明应用高时间分辨率MODIS图像能够准确反演并拟合逐日LAI，可以为冷害影响下水稻单产的研究提供参考。

Quantitative Study on the Effect of Climatic Factor Change on Paddy Rice Yield Per Unit Based on Remote Sensing Technique

This paper took the Wuchang city of Heilongjiang province as the study area. The authors applied a series of MODIS imageries selected from the transplanting to the maturity of rice growth stage to calculate the NDVI values. Subsequently, the corresponding LAI values could be retrieved from NDVI so as to fit the daily LAI values for whole rice growth phase. With the application of SIMRIW model agronomic parameters, the daily LAI values were input into SIMRIW model to compute the paddy rice yield per unit under the condition of low temperature for the year 2006. The results showed that the final paddy rice yield per unit for the year 2006 was 5411.74kg/ha which accounted for 84 % of the actual value. The study result proved feasibility of accurate retrieving of the daily LAI from MODIS characterized by high temporal resolution and provided the reference for the research in the field of the effect of cold damage on paddy rice yield per unit.