Professor, Ph.D., Vice Director Farmland Irrigation Research Institute Chinese Academy of Agricultural Sciences and the Ministry of Water Resources 380 East Hongli Road, Xinxiang City, Henan Province, P.R.China 453002 Tel. +86-373-3393277, Mobile+86-13803731096 FAX +86-373-3393308 E-mail: qxb6301@sina.cn