宁南半干旱地区农田水分平衡与稳定型种植制度研究

The Farmland Moisture Balance and stable Type Planting System in Semiarid Regions in South Ningxia

通过对宁南半干旱地区不同作物水分平衡及作物产量统计特征的分析表明：秋粮对当地降雨利用率、高产性、稳产性明显优于夏粮。在立足于抗旱减灾、提高系统水分转化效率，趋利避害，增强粮食生产稳定性的干旱气候农业对策的基本思路下，提出“压粮扩草”、“压夏扩秋”的种植业结构调整方针。并通过线性归划的方法对稳定型种植制度的作物配制比例进行了定量化研究。

The statistic analysis of different crop water balance and crop yields in the semiarid regions in South Ningxia indicated that autumn crops for local rainfalll useefficiency,high yield and stability are superior to summer crops. Under the guidingthinking of drought resistance and disaster reduction,the improvement of moisture con-version efficiency of the system,the encourage of good things and the eradication of badthings and the strengthening of agricultural countermeasures against dry weather to in-crease stability of food production,this paper suggests the principle of “reducing foodproduction,while incrdasing forage crop production; reducing summer crops while in-creasing autumn crops”.Also,the quantitative analysis was made of crop matching pro-portions in stable type planting system using linear planning method.