论文部分内容阅读
通过对哲盟南部不同封育年限的围封地内部(没有人为破坏)和外部的沙丘和土地沙样化验分析,以及对固定沙丘和流动沙丘的土壤容重和土壤含水量的野外测定。可以看出,沙漠化土地围封后土壤理化性质有如下变化:1.沙漠化土地围封后,土壤水分有下降的趋势,表层土壤颗粒变细,土壤容重下降。2.土壤表层有机质和全氮明显增加,形成的土壤结皮中的碳酸钙也有增加,土壤剖面中下部有不同程度的脱铝铁过程。
Based on the laboratory analysis of sand samples in the enclosed area (no human destruction) and the external sand dunes and land under different enclosure years in the south of the HEFE and the field measurements of soil bulk density and soil water content in fixed dunes and mobile sand dunes, It can be seen that the soil physical and chemical properties of the desertified land after the enclosure have the following changes: 1. After the desertified land is enclosed, the soil moisture has a downward trend, the surface soil grain becomes thinner and the soil bulk density decreases. Soil organic matter and total nitrogen in the soil increased obviously, calcium carbonate formed in the soil crust also increased, the soil profile in the lower part of the degree of the dealuminated iron process.