基于作物种植结构优化的农业节水潜力分析——以武威市凉州区为例

Agricultural water-saving potential analysis based on crop planting structure optimization ——A case study of Liangzhou

以武威市凉州区为例,以传统节水潜力计算方法为基础,在保证粮食安全、工业原料需求、畜牧饲草等要求的前提下,增加了农业种植结构优化因素,提出了基于种植结构优化的农业节水潜力概念和计算方法。其计算过程包括降低灌溉定额、提高灌溉水利用系数、优化种植结构三个部分。运用该方法计算出2005年武威市凉州区基于种植结构优化的农业节水潜力为2.63亿m3,比传统的农业节水潜力提高13.3%,农业总产值增加6.04亿元,净收益增加4.32亿元。

For the situation of Liangzhou in Wuwei City,agricultural planting structure optimization measures are added to traditional water-saving potential under the premise of food security,industrial demand for raw materials,livestock fodder and so on.The concept of agricultural water-saving potential which is based on structure optimization and its calculation method are proposed.Its calculation process includes reducing irrigation quota,raising irrigation water efficiency and optimizing planting structure.Liangzhou District was selected as a case study in 2005,the agricultural water-saving potential based on structure optimization is 263 million cubic meters,which is 13.3% more than traditional methods,as a result,the agricultural output increased by 604 million yuan and the net income increased by 432 million yuan.