干旱地区农业研究Issue(1)：199-204,6.DOI:10.16302/j.cnki.1000-7601.2015.01.033
基于净初级生产力的春小麦生产潜力及估产研究--以甘肃省白银区为例
Potential productivity and yield estimation of spring wheat based on a Net Primary Production model---Taking Baiyin district in Gansu province as an example
摘要
Abstract
Based on the Carnegie Ames Stanford Approach (CASA) ,a net primary productivity (NPP) model for spring wheat was established with 250 m × 250 m MODIS remote images and weather station-based meteorological data in the Baiyin District at wheat growing season from April to July 2010 .Through calculation on the transform relationship be-tween NPP and dry matter ,the potential productivity of spring wheat was estimated .The results showed that the NPP and potential productivity of spring wheat in south area were both greater than those in the north area of Baiyin District .The minimal value of NPP was 42 gC·m-2·a-1 and the maximal value was 402 gC·m-2·a-1 .In the meantime ,it was found that the production potential of spring wheat showed clear correlations with seasons .According to the actual wheat yield of per unit area and the potential productivity of spring wheat ,the estimation model by regression analysis was established . Further tests were carried out to evaluate the accuracy and utilization of the model with a root mean square error ( RMSE) at 76 .33 g·m-2 and a relative root mean square error ( RMSEr ) at 23 .51% .关键词
净初级生产力/春小麦生产潜力/估产模型/白银区Key words
Net Primary Productivity (NPP)/spring wheat potential productivity/yield estimate/Baiyin district in Gansu province分类
农业科技引用本文复制引用
赵军,王玉纯,党国锋,武江民,付杰文,师银芳..基于净初级生产力的春小麦生产潜力及估产研究--以甘肃省白银区为例[J].干旱地区农业研究,2015,(1):199-204,6.基金项目
国家自然科学基金项目 （）
