近年来,随着人口迅速增加,耕地后继资源日渐枯竭,人多地少,粮、经、油、饲作物争地的矛盾日益尖锐。如何充分利用自然资源,提高土地利用率,增加单位耕地面积的产量和产品种类已成为农业生产中的重要课题。按宁夏宁南地区的常规种植方式是一年一熟,光温资源丰足有余,一年两熟又嫌光、温不足。如果采用套种方式,则可充分利用生长季节和自然、土地资源。加之在农村经济体制改革后,以农户为单位对有限的土地进行微观安排与集约经 In recent years, with the rapid increase of population, the successive depletion of cultivated land is becoming more and more frequent with less people and more conflicts between grain, oil, oil and feed crops. How to make full use of natural resources, increase land utilization and increase the output of cultivated land per unit area and product categories have become important topics in agricultural production. According to Ningnan Ningnan conventional planting method is a year a ripe, abundant light and heat resources more than a year, twice-cooked and too light, lack of temperature. If using intercropping, you can make full use of the growing season and natural and land resources. In addition, after the reform of the rural economic system, the micro-arrangement and intensive economic