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为了揭示不同秸秆和砂石覆盖厚度对抑制土壤水分蒸发的效果,本文通过室外模拟试验,研究了不同秸秆和砂石覆盖厚度对土壤水分蒸发的影响。试验设置无覆盖(CK)、覆秸秆3cm(S1)、覆秸秆5cm(S2)、覆秸秆10cm(S3)、覆砂3cm(S4)、覆砂5cm(S5)、覆砂10cm(S6)这7种形式。结果表明:在不同覆盖厚度条件下,秸秆和砂石覆盖均可有效抑制土壤水分蒸发,随覆盖厚度的增加,保水效果越好。在相同覆盖厚度条件下,秸秆覆盖的保水效果优于砂石覆盖的,随覆盖厚度的增加,秸秆和砂石覆盖的保水效果差异减小。
In order to reveal the effect of different straw and sand cover thickness on the inhibition of soil water evaporation, this paper studied the effects of different straw and sand cover thickness on soil water evaporation through outdoor simulation test. The results showed that CK (CK), 3cm (S1) covered straw, 5cm covered straw (S2), 10cm covered straw (S3), 3cm covered sand (S5), 5cm covered sand 7 kinds of forms. The results showed that under different cover thickness, straw and sand cover could effectively inhibit soil water evaporation. With the increase of cover thickness, the better water retention effect. Under the same cover thickness, the water retention effect of straw mulch is better than that of sand and gravel. With the increase of mulching thickness, the difference of water holding effect of straw mulching and sand grading is reduced.