干旱对灌溉和雨养农田生态系统生产力的影响对比分析

刘莹,朱秀芳,徐昆,陈令仪,郭锐

Comparative Analysis of the Impact of Drought on the Crop Productivity of Irrigated and Rain-fed Farmland Ecosystems

Ying Liu,Xiufang Zhu,Kun Xu,Lingyi Chen,Rui Guo

表 1 区域尺度上2000~2014年北方旱区灌溉农田和雨养农田干旱、EVI和GPP变化趋势

Table 1 The trends of drought, EVI and GPP in irrigated farmland and rainfed farmland in the DNC from 2000 to 2014 at a regional scale

趋势线 干旱区 半干旱区 灌溉农田 雨养农田 灌溉农田 雨养农田 SPEI SPEI=0.001 4x-2.646 5 SPEI=0.010 2x-20.365 9 SPEI=0.016 7x-33.434 4 SPEI=0.042 8x-86.034 0 EVI（***） EVI=0.003 5x-6.765 1 EVI=0.003 1x-6.081 9 EVI=0.003 56x-6.908 2 EVI=0.003 60x-7.002 8 GPP（***） GPP=0.525 0x-1 004.243 1 GPP=0.461 3x-878.787 2 GPP=0.647 6x-1 239.460 7 GPP=0.903 4x-1 756.841 7