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旱地玉米秸秆覆盖技术具有明显的保墒效果,取材方便、省工省事。整秆半耕半覆盖0～50cm保墒效果比常规耕作明显,随着土层加深,差异减小。在持续干旱情况下,覆盖保墒效果减弱,但能起到缓解旱情的作用。耕层土壤含水量随着秸秆覆盖量的增大而增加,但不同秸秆覆盖量处理的土壤含水量在玉米生育前期差异大,后期差异小。
Dryland maize straw mulching technology has significant effect of preserving soil moisture, drawing material conveniently and saving labor and energy. Semi-tillage half tillage 0 ~ 50cm soil moisture conservation effect than conventional farming significantly, with the deepening of soil, the difference decreases. In the case of persistent drought, the effect of covering the soil moisture is weakened, but it can also play a role in alleviating the drought. The soil moisture content of topsoil increased with the increase of straw mulching amount, but the soil moisture content under different straw mulch treatments varied greatly in the early growth period of corn and little in the later period.