摘要
为了为广大旱作区节水高效种植结构优化提供依据,以国家科技支撑计划河村项目区作物种植结构为研究对象,利用多元分析、多目标规划等方法研究了河村项目区降水、作物需水变化规律,在此基础上,选择经济效益、水分利用效益为目标函数,提出了不同降水年型的节水种植结构。结果表明:河村项目区自然降水呈减少的趋势,年际间变幅大,年内降水集中;6月～9月降水与作物需水耦合度高;丰水年增加蔬菜面积、干旱年增加粮豆作物面积可提高水分利用效益。
Planting structure adjustment is the premise to ensure the sustainable use of water resources in dry farming areas.Taki-ng the crop planting structure in the Hecun project area of national scientific and technological support plan as studying object,the rainfall and crop water demanding variation were studied using multivariate analysis method and multi-objective planning.On the basis,selecting the cost-effectiveness and water use efficiency as the objective functions,the water-saving planting structures of different rainfall years-types were proposed.The results showed that the rainfall showed a decreasing trend of,its interannual range was large,rainfall during the year was concentrated,and the coupling degree of precipitation and crop water requirement was good from June to September in the project area.Increasing vegetable planting proportion in wet-year and foodstuff and bean crop planting proportion in drought years can improve water using benefit.
出处
《山西农业大学学报（自然科学版）》
CAS
2010年第6期481-486,共6页
Journal of Shanxi Agricultural University(Natural Science Edition)
基金
国家科技支撑计划资助基金(2007BAD88B03)
