锡林郭勒草地NDVI和牧草估产产量的变化特征
Chinese Agricultural Science Bulletin(2015)
Abstract
为及时准确了解草地牧草生长状况,利用EOS/MODIS遥感资料结合地面同步调查数据,分析锡林郭勒草原草甸草原、典型草原和荒漠草原3种草地类型NDVI和草地生物量的月际变化特征.结果表明,利用S曲线回归估产模型测算的草地生长季逐月牧草产量能较好地反映其生长状况变化,体现了各类草地地上生物量的分布特征.其中,草甸草原牧草生长季NDVI和牧草平均估产产量变化范围分别为0.208~0.560和39.8~168.6 g/m(干重),峰值出现在8月;典型草原牧草生长季NDVI和牧草平均估产产量变化范围分别为0.194~0.480和33.7~146.2 g/m2(干重),峰值出现在7月;荒漠化草原牧草生长季NDVI和牧草平均估产产量变化范围分别为0.130~0.185和10.0~29.8 g/m2(干重),峰值出现在7月.
MoreKey words
vegetation index,Xilingol,MODIS,grassland biomass,S-curve regression model
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