天山北坡中段天然草场牧草产量遥感动态监测模式

THE REMOTE SENSING DYNAMIC MONITORING MODEL FOR GRASS YIELD OF NATURAL GRASSLAND IN THE NORTH SLOPE OF TIANSHAN MOUNTAINS

本文用1989—1991年在天山北坡不同草场类型上观测的牧草产量与光谱资料以及同步接收的NOAA/AVHRR资料,计算了牧草产量与各种植被指数的相关系数。结果表明,天然草场牧草产量与各种植被指数存在显著相关,并建立天然草场牧草产量动态监测模型;牧草干重和鲜重与气象卫星比值植被指数的相关系数达0.7597和0.8066;建立牧草产量卫星遥感监测模型,可用于天然草场牧草产量的动态监测。

In this paper, using grass yield and spectral data observed in differenttype grasslands on the northern slope of Tianshan Mountians and synchro-nous NOAA/AVHRR data, the correlation coefficients between grass yieldsand various vegetation indices are calculated, and the spectral dynamicmonitoring models are established. The correlation coefficient between hayweight and NOAA/AVHRR ratio vegetation index is 0.7597, and 0.8066between green weight. The authors have yet established the satellite remotesensing models that could be used to monitor grass yields of naturalgrassland.