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本文分析了地膜覆盖条件下,土壤耕层积温的变化对玉米根系及地上植株生长影响的生理基础.同时对传统的“蹲苗”措施进行了讨论.指出蹲苗是播种后土壤耕层温度持续偏低导致幼苗缓慢生长,不得已而采取的措施.实际上是延迟性冷害的表征.
This paper analyzes the physiological basis of the effects of accumulated soil temperature on the growth of maize root and aboveground under the condition of plastic film mulching.At the same time, the traditional “squat seedling” measures are discussed.It is pointed out that the soil plow temperature is low after sowing Slow growth of seedlings caused by the last resort, and is actually a sign of delayed chilling damage.