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随着生产条件和种植制度的变革与改善,河西走廊川区的不少地方,将延续已久的一年一熟制改革为一年多熟制,发展了多种多样的间作套种形式,促进了农业生产的发展。间套种的产生和发展与农业气候资源有着密切的关系,尤其是受着热量资源的制约。河西走廊川区耐寒作物生长季中(3月上、中旬至11月上、中旬)≥0℃的积温为3400—4100℃。春小麦中熟种生育期一般需要≥0℃积温1750—1850℃,在7月中、下旬黄熟收割后尚有100
With the transformation and improvement of production conditions and cropping system, quite a few areas in Hexi Corridor Chuanqu District have developed the long-established one-year-old system for more than a year and developed a variety of intercropping forms to promote The development of agricultural production. The occurrence and development of intercropping are closely related to agricultural climate resources, especially due to the restriction of heat resources. Hexi Corridor cold-resistant crop growth season in Sichuan District (March, mid-November, mid-November) ≥ 0 ℃ accumulated temperature 3400-4100 ℃. The maturity stage of spring wheat generally needs ≥0 ℃ accumulated temperature 1750-1850 ℃, there is 100