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河西沿山冷凉灌区小麦播种面积209.57万亩,占本区粮食作物播种面积的57.1％,占河西小麦播种面积的42.8％,平均亩产356.2斤,分别比平川区和沙漠沿线灌区低247.4斤和138.8斤,比河西地区小麦的平均亩产低123.5斤,这种低产状态是应当和能够改变的。据研究,中早熟春小麦品种需要≥0℃的积温1700—1850℃,中晚熟品种1850—2000 ℃,本区的积温条件是完全可以满足春小麦生长发育需要的。特别是本区小麦生长阶段,气温呈两头低中间高的趋势,更有利于小麦的生长发育。春小麦分蘖至拔节期的生物学下限温度为7—8℃,最适温度为11—16℃。在此阶段,低温日数每增减一天,结实小穗数就可±0.36个,
Hexi Irrigation District along the cool sown area of 209.57 hectares of wheat, accounting for 57.1% of the sown area of food crops in the region, accounting for 42.8% of Hexi area sown area, the average yield of 356.2 kg, respectively, lower than Pingchuan and desert irrigation 247.4 kg And 138.8 kg, lower than the average yield of wheat in Hexi area 123.5 kg, this low yield status should and can be changed. According to the research, the mid-precocious spring wheat needs the accumulated temperature of ≥0 ℃ 1700-1850 ℃, the middle-late matured variety 1850-2000 ℃, the accumulative temperature conditions in this area can fully meet the needs of spring wheat growth and development. Especially in the growing stage of wheat in this area, the temperature tends to be low in the middle and low in both ends, which is more conducive to the growth and development of wheat. The biological minimum temperature for spring wheat tillering to jointing is 7-8 ℃ and the optimum temperature is 11-16 ℃. At this stage, the number of low-temperature days for each increase and decrease, the number of strong spikelets can be ± 0.36,