積雪與地表聯(lián)合覆蓋條件下凍融土壤水鹽運移規(guī)律
[Abstract]:In order to explore the changing rule of soil water and salt migration under the condition of combined snow cover and surface cover in freezing and thawing season in Shihezi irrigation area, the field experiment was carried out in 2015-2016, and straw and mulching film were carried out. The temporal and spatial dynamic changes of soil water and salt in the whole seasonal freezing and thawing period were studied under three kinds of active carbon land cover and bare land control. The results showed that the surface cover had better effect of preserving soil moisture and reducing salt than bare soil. The maximum increase of soil water content in straw and activated carbon mulch was 0-30 ~ 40 cm after the frozen soil was completely melted, which indicated that the two kinds of mulch were more favorable for soil moisture retention and high efficient utilization of snow melting water after the freezing and thawing process. The salt content of activated carbon, straw, plastic film mulching and bare land in 0-30cm soil layer was 18.08 than the initial value, respectively, and 20.30% and 32.81%, respectively. It can be seen that the inhibition effect of active carbon mulch on the upward migration of salt is the most significant. Straw mulch followed; The variability of soil moisture and salt decreased with the increase of soil depth during freezing and thawing.
【作者單位】: 石河子大學(xué)水利建筑工程學(xué)院;
【基金】:國家自然基金新疆聯(lián)合基金重點項目(u1203282) 地區(qū)基金項目(51569028) 石河子大學(xué)青年骨干教師培訓(xùn)項目(CZ0245)
【分類號】:S152.7
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