1. Key
Laboratory of Agricultural Water Resources, Center for Agricultural
Resources Research, Institute of Genetic and Developmental Biology, The Chinese Academy of Sciences, 286 Huaizhong Road, Shijiazhuang, 050021 Hebei, China
2. Research Center for Rural Economy Ministry of Agriculture, No. 56, Xisizhuanta Hutong, Beijing 100810, China
3. College of Resources & Environmental Sciences, Agricultural University of Hebei, Baoding 071001, China
4. School
of
Environment, Natural Resources and Geography, Bangor University, Bangor LL57 2UW, U.K.
5. College
of Resources and Environmental Sciences, China Agriculture University, Beijing 100193, China