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春小麦是武威地区的主产作物,每年的播种面积约占粮食作物种植面积的70—80％。每逢春小麦处于开花至乳熟期,即六月中旬至七月中旬,往往遭到不同程度的干热风袭击,致使春小麦青秕或逼熟,产量下降。为了躲避、减轻这个危害,我们于一九七三至一九七五年,用春小麦中晚熟品种甘麦39号作了分期播种试验,很有成效。一、春播期间气温变化的类型武威春季高空多小槽小脊活动,冷暖气团交替出现,气温变化大,极不稳定。一九七三至
Spring wheat is the staple crop in Wuwei Prefecture, with annual sown area accounting for 70-80% of the area planted with food crops. Whenever spring wheat is in flowering to milky ripening, that is, from mid-June to mid-July, it is often hit by dry and hot winds of different degrees, resulting in spring wheat or baring or barren production, declining output. In order to evade and alleviate this harm, we conducted a staged seeding experiment with the middle-late maturing spring variety “Ganmai 39” from 1973 to 1975, which was very fruitful. First, the type of temperature during spring sowing Wuwei spring small multi-trough small ridge activity, alternating cold and warm air mass, temperature changes, very unstable. 1973