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为探索秸杆覆盖对土壤盐分分布的调控作用,采用测坑试验,设置了表层覆盖、地表下30cm覆盖和无覆盖三种处理进行对比试验研究,结果表明:盐碱土秸秆覆盖后影响了土壤盐分的运移和分布,不同位置秸秆覆盖可以抑制盐分上移,调控盐分在秸秆覆盖层下方的分布。地表下30cm处覆盖秸秆后0～20cm土层盐分含量较低,30～40cm深处土层盐分小幅聚集。地表下30cm秸秆覆盖具有明显的抑制盐分上移作用,且抑盐效果高于表层覆盖。秸秆覆盖能够起到调控盐分分布,在一定程度上改良盐碱土。
In order to explore the regulation effect of straw covering on soil salinity distribution, the experiment of test pit was used to set up the comparison of surface covering, covering 30cm under the surface and no covering treatment. The results showed that the effect of soil salinity Of the transport and distribution of straw mulching in different locations can inhibit the salt up, regulating the distribution of salt in the straw cover below. After covering the straw 30 cm below the surface, the salt content of 0-20 cm soil layer was lower, and the salt content of soil layer slightly concentrated in the depth of 30-40 cm. Under the surface 30cm straw mulching has significantly inhibited the upward shift of salt, and salt suppression effect is higher than the surface coverage. Straw cover can play a role in regulating salt distribution, to a certain extent, improve the saline-alkali soil.