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3 2000~2014年北方旱区灌溉农田和雨养农田去趋势干旱指数与植被指数异常和总初级生产力异常的相关系数及线性拟合斜率

Table 3 Correlation coefficients and linear fitting slopes between Detrended SPEI and EVI/GPP anomaly of irrigated farmland and rainfed farmland in the DNC from 2000 to 2014

植被生产力	区域	相关系数		线性拟合斜率
植被生产力	区域	灌溉区	雨养区	灌溉区	雨养区	（雨养-灌溉）/雨养
EVI	北方旱区	0.73	0.84	0.061	0.090	32.22%
	干旱区	0.62	0.80	0.048	0.074	35.14%
	半干旱区	0.78	0.84	0.069	0.082	15.85%
GPP	北方旱区	0.88	0.91	3.79	5.37	29.42%
	干旱区	0.82	0.88	2.82	4.23	33.33%
	半干旱区	0.87	0.88	4.24	5.54	23.47%