群众讲:“粮食要过千,两茬容易一茬难”。这说明复种能增加单位面积上的产量。天水县渭河干流川道地区一年两熟面积已达百分之七十以上,随着以提高复种指数为主要内容的耕作制度改革的发展、技术集约经营水平的提高和农村经济条件的改善,复种面积还有扩大的趋势。目前,哪种复种类型最适宜呢?天水县农业技术推广站对万亩两熟制调查的结果表明:以“小麦、马铃薯(洋芋)、小麦——小麦、荏(油料)、油菜——油菜、玉米、小 The masses said: “The grain is over a thousand, and the two stubble are easy to find.” This shows that multiple cropping can increase the yield per unit area. Tianshui County, Weihe River Basin area of ​​two-year double-crop area has reached more than 70 percent, with the improvement of cropping index as the main content of the reform of the farming system, the level of technology intensive management and improved rural economic conditions, There is also an expanding area. At present, what kind of multi-crop type is the most suitable? Tianshui County Agricultural Technology Extension Station of mu two-crop survey results show that: "wheat, potato (potato), wheat - wheat, Corn, small