我区海拔一千六百至二千四百公尺,无霜期一百五十多天,地势高,气温低。在这样的自然条件下,小麦收后复种水稻,是改革耕作制度,提高复种指数的一项新尝试。去年,在学习银川地区的经验后,我们引进合交5602和文光7012等水稻品种,在全区二十六个点上进行试验,共复种水稻二百二十三亩。各点都取得了复种水稻的第一手材料,亩产一般在四百斤以上,高者达八百多斤,实现了复种一季上《纲要》,比麦后复种糜谷产量高出数倍,夏 My area elevation of 1600 to 2400 meters, frost-free period of more than 150 days, high terrain, low temperature. Under such natural conditions, wheat is planted in multiple cropping rice, which is a new attempt to reform the farming system and increase the multiple cropping index. Last year, after studying the experience of Yinchuan, we introduced rice varieties such as 5602 and Wen-wu 7012, and conducted experiments at 26 spots in the region, covering a total of 233 hectares of rice. Each point has been made of first-hand material of multiple cropping rice, generally more than four hundred kilograms per mu, the highest up to 800 kilograms, to achieve the “plan” on the first quarter of the multi-crop, wheat multiple yield than the wheat multiple times ,summer