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黑龙江省地处祖国北部,无霜期短,热量资源不足,全年降雨少,且分布不匀,冷害和旱害是当地玉米产量不高不稳的两大外界因素。为解决上述两大主要矛盾,探讨玉米高产稳产新途径,于1984年～1986年开展了玉米地膜覆盖高产栽培体系及理论的研究。经试验,示范、推广证明:采用玉米地膜覆盖栽培,调控局部生态环境,是满足玉米生长发育需要和延长生长周期的有效途径。在全省示范、推广
Heilongjiang Province is located in the northern part of the motherland, frost-free period is short, inadequate heat resources, less rainfall throughout the year, and uneven distribution of cold damage and drought are the two major external factors of the local corn yield is not stable. In order to solve the above two major contradictions and to explore new ways of high and stable yield of maize, a high yielding cultivation system and theory of maize mulching was carried out from 1984 to 1986. The test, demonstration, promotion proved: the use of plastic film mulching cultivation, regulation and control of local ecological environment is to meet the growth and development needs of corn and an effective way to extend the growth cycle. Demonstration in the province, promotion