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临夏州位于青藏高原的边缘,大部属高寒地区,其中海拔1800—2100米之间的川塬灌区约有30多万亩。这一地带土地平坦,灌溉便利,历来是春小麦的高产区,目前春小麦占粮播面积的70％。春小麦在3月播种,7月中下旬成熟,收割后的8、9、10月的月平均气温分别为16.9—17.5℃、12.3—13.1℃和6.7—7.4℃,且阴雨日较多,日照时数少,复种小秋作物往往由于后期气温低和光照不足而不能成熟。从热量条件来说,是属一年一茬有余,两茬
Linxia is located on the edge of the Qinghai-Tibet Plateau, most of the alpine region, of which 1800-2100 meters above sea level in the Sichuan Irrigation Area about 30 million mu. The land is flat and irrigation is convenient and has always been a high-yielding area for spring wheat. At present, spring wheat accounts for 70% of the grain-sown area. Spring wheat sowed in March and matured in mid-to-late July. The monthly mean temperature in August, September and October after harvest was 16.9-17.5 ℃, 12.3-13.1 ℃ and 6.7-7.4 ℃, respectively, with more rainy days. The number of small, crop hybrid crops are often due to late low temperatures and inadequate lighting and can not mature. From the heat conditions, is more than a year, two stubble