天山北坡农田防护林空间密度对NDVI的影响

Effects of Spatial Density of Farmland Shelterbelts on NDVI in the Northern Slope of Tianshan Mountains

防护林是保护农田的一道生态屏障,对改善环境,防风固沙、提高作物产量具有重要意义,防护林空间密度可以直接反映防护林分布的疏密程度。以天山北坡经济带为研究区,利用网格法可知农田防护林空间密度分布情况,将网格法与NDVI数据相结合,获取作物生长期内NDVI平均值,通过对比有无防护区范围内作物长势,分析防护林对作物的防护效益。

Shelterbelt is an ecological barrier to protect farmland,which is of great significance for improving the environment,preventing wind and sand fixation,and improving crop yield.The spatial density of shelterbelt can directly reflect the density of shelterbelt distribution.Taking the economic belt on the northern slope of the Tianshan Mountains as the research area,the spatial density distribution of farmland shelterbelts could be known by using the grid method.The average value of NDVI during crop growth period were obtained by using the grid method combined with the NDVI data.The protection benefits of shelterbelts on crops were analyzed by comparing the crop growth with or without the scope of the protective zone.