沙柳沙障对土壤水分和养分的影响

[目的]为了更好地防风固沙，防治荒漠化。[方法]通过对达拉特旗七里沙沙柳（Salix psammophilaC．）沙障的实地调查研究，系统分析沙柳沙障对土壤水分和养分的影响。[结果]沙柳沙障对土壤含水量有极显著影响，死沙障土壤含水量较高，成活沙障土壤含水量低；沙柳沙障对土壤全氮含量有影响，成活沙障沙丘影响极显著，死沙障沙丘影响不显著，土壤全氮含量以成活沙障沙丘最高，另外2个沙丘全氮含量差别不大，没有明显规律性；沙柳沙障对土壤全磷含量有影响，但均不显著，土壤全磷含量以成活沙障沙丘最高，死沙障沙丘全磷含量最少；沙柳沙障对土壤全钾含量有极显著影响，土壤全钾含量以死沙障沙丘含量最高，裸沙地沙丘全钾含量最少；沙柳沙障对土壤有机质含量有影响，成活沙障影响显著，死沙障影响不显著，土壤有机质含量以死沙障沙丘为最高，成活沙障沙丘有机质含量最少。[结论]该研究可为今后沙柳沙障的设立提供依据。

Effects of Salix psammophila C. Sand Barrier on Soil Moisture and Nutrient

[ Objective ] The research aimed to prevent the wind, fix the sand, and combat the desertification. [ Method ] Through investigation in the Dalat country seven miles rustle Salix psammophila C. sand barriers on-the-spot, the influences of Salix psammophila C. sand barrier on the soil moisture and the nutrient were studied. [ Result] Salix psammophila C. sand barrier had the remarkable effects on the soil moisture content. Soil moisture content of dies the sand barrier was high, and that of survives the sand barrier was low. Salix psammophila C. sand bar- rier had the effects on soil entire nitrogen content. The influence of survives the sand barrier sand was extremely remarkable, and that of dies the sand barrier sand wash＇ t remarkable. The soil entire nitrogen content by survives the sand barrier sand dune was high. Moreover, entire nitrogen content of two sand dunes was basic almost, which didn＇ t have the obvious regularity. Salix psammophila C. sand barrier had the effects on soil entire phosphorus content, but wasn＇ t remarkable. The soil entire phosphorus content by survives the sand barrier sand dune was high, and that of dies the sand barrier sand dune on entire phosphorus content was the least. Salix psammophila C. sand barrier had the extremely remarkable effects on the soil entire potassium content. The soil entire potassium content by dies the sand barrier sand dune content was high, and that of the bare sand dune on entire potassium content was the least. Salix psammophila C. sand barrier had the effects on soil ulmin content. The effects of survives the sand barrier was remarkable, and that of dies the sand barrier wasn＇ t remarkable. The soil ulmin content by dies the sand barrier sari~t dune was high, and that by survives the sand barrier sand dune was the least. [ Conclusion] The research could provide the reference for the establishment of Salix psammophila C. sand barrier.