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黑龙江省属于高纬度、高寒地区,气候冷凉,无霜期短,受大陆性气候的影响,作物生育期间常遭干旱和低温的威胁;干旱和低温成了本省农业生产上的两大限制因素。为了抗御和最大限度地减少这两大限制因素对农业生产的影响,采用地膜覆盖栽培技术是克服春季干旱满足作物生长需要,延长作物生长周期,确保晚熟玉米品种正常成熟,是半干旱地区玉米增产的有效途径。
Heilongjiang Province belongs to the high latitude and alpine region with cold climate and short frost-free period. Due to the influence of the continental climate, the crops are often threatened with drought and low temperature during the crop growth period. Drought and low temperature have become the two major limiting factors in the province’s agricultural production. In order to resist and minimize the impact of these two restrictive factors on agricultural production, the plastic film mulching cultivation technology is to overcome the spring drought to meet the needs of crop growth, extend the crop growth cycle, to ensure the maturity of late maturity corn varieties, is the corn yield increase in semi-arid areas Effective way.