Dynamic Winter Wheat Yield Estimation Model Based on GIS
——A Case Study of Yuncheng City in Shanxi Province

Abstract

Abstract: Based on the census data of winter wheat yield and meteorological observation data from 1982 to 2008, the information of meteorological elements in cultivated land was extracted by ArcGIS. A ten day dynamic winter wheat yield estimation model from county scale to region scale was established on SPSS11.5. These models were tested by winter wheat yield data of 2008. The results showed that the relative error absolute value of county scale model was between 0.2% and 20.6%, and the estimation accuracy of county scale model was low. The relative error absolute value of region scale model was between 0.3% and 4.7%. The error is lesser while the stability is high. Therefore it was suitable for actual business operation.

Key words: GIS, Winter wheat, Dynamic yield estimation model

LUAN Qing，MA Yali，WU Yongli，LI Weiwei，XIANG Dong. Dynamic Winter Wheat Yield Estimation Model Based on GIS
——A Case Study of Yuncheng City in Shanxi Province[J]. Chinese Journal of Agrometeorology, 2011, 32(增刊): 135-139.

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