国家自然科学基金项目No.31160269;“十二五”《循环农业科技工程》No.2012BAD14B03;甘肃省干旱生境作物学重点实验室开放基金课题No.GSCS-2012-13;甘肃省自然科学基金No.145RJZA204;Supported by the National Natural Science Foundation of China No.31160269,the Project of “ the Twelfth Five-Year Plan” for Circulation of Agricultural Science and TechnologyNo.2012BAD14B03 and the Open Found of Gansu Provincial Key Lab of Aridland Crop Science ProjectNo.GSCS-2012-13 and the Natural Science Foundation of Gansu ProvinceNo.145RJZA204