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在河西灌区研究地膜覆盖春玉米栽培技术,探求不同覆盖方式对当地旱地春玉米土壤水温变化规律和玉米生长的影响。结果表明,玉米生育期内全膜覆盖的水分利用效率最高,膜上覆土次之;覆盖处理对土壤温度的影响主要集中在玉米生长前期。不同的覆盖处理均能够有效起到提高玉米产量的效果,砂田覆盖的推广潜力存在但推广难度较大,综合膜上覆土处理的水分利用效率和增温保温效果仅次于全膜覆盖,产量仅次于砂田覆盖。因此,膜上覆土能够为河西灌区春玉米高产高效提供保障,为大面积种植提供推广依据。
In Hexi Irrigation Area, the cultivation techniques of plastic mulching spring maize were studied to explore the effects of different mulching methods on the variation of soil water temperature and maize growth in spring maize. The results showed that the water use efficiency of the whole film mulching was the highest during the growth period of maize, followed by the soil covering of the film. The effect of the mulching on the soil temperature mainly concentrated in the early stage of corn growth. Different coverage treatments can effectively improve the yield of corn. The popularization potential of the field covered but difficult to popularize. The water use efficiency and thermal insulation effect of the integrated soil cover treatment is second only to the full-film coverage, the yield is only Second in the sand field cover. Therefore, the overburden on the film can provide high-yield and high-efficiency spring maize for protection in Hexi Irrigation Area and provide promotion basis for large-area planting.