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文章基于MODIS下MOD17A3、MCD12Q1产品,结合气温、降水数据,利用距平分析、趋势线分析以及相关分析等方法,对河南省2001年至2010年农田生产力的时空变化格局及影响因素进行了研究。结果表明:河南省农田生产力整体呈现东南高、西北低的态势;研究期内农田生产力呈现减少趋势的面积比例为4.98%,集中分布在信阳市的潢川县、固始县;河南省大部分农田的NPP与气温成正相关,成负相关的农田集中分布在西北边缘一带;农田NPP与降水成正相关的区域分布偏北,成负相关区域分布偏南,南阳盆地一带较为集中。
Based on MODIS MOD17A3 and MCD12Q1 products combined with temperature, precipitation data, an anomaly analysis, trend line analysis and correlation analysis, the paper studied the spatial and temporal changes of farmland productivity and their influencing factors in Henan Province from 2001 to 2010. The results showed that the overall productivity of farmland in Henan showed a trend of high in the southeast and low in the northwest. The area ratio of farmland productivity decreased 4.98% in the study period, mainly in Huangchuan County and Gushi County of Xinyang City. Most of Henan Province The NPP of farmland is positively correlated with air temperature, and the negatively correlated farmland is concentrated in the northwestern margin. The positive correlation between NPP and precipitation in farmland is northward, and the distribution of negative correlation is southward, while the Nanyang basin is more concentrated.