新疆博斯腾湖周围白刺属植物下土壤有机质空间分布特征研究

目的]为了探讨土壤有机质含量的统计学特征、分布特征及其与土壤盐分、pH等指标的相关性。方法]分析和硕县内白刺属植物分布区、白刺属植物与胡杨混合分布区、白刺属植物与红柳混合分布区土壤有机质含量的分布情况。结果]各区土壤不同深度的有机质含量依次为上层中层下层,有机质含量随深度增加而减少。表层土壤有机质含量分布规律是:白刺属植物与胡杨混合分布区白刺属植物分布区白刺属植物与红柳混合分布区;而对于垂直分布规律,各区土壤有机质含量都是从表层到下层呈现递减趋势,但是递减程度不同。白刺属植物分布区表层土壤有机质含量与全盐量呈0.05水平显著正相关,中层土壤有机质含量与Ca2+、K++Na+呈0.05水平显著正相关,下层土壤有机质含量与Mg2+、K++Na+、pH呈0.05水平显著负相关;白刺属植物与胡杨混合分布区表层土壤有机质含量与全盐量、Ca2+呈0.05水平显著正相关,中层土壤有机质除了与Ca2+呈0.05水平显著正相关以外,其他的都呈0.05水平显著负相关,下层土壤有机质含量与每个变量都呈0.05水平显著正相关;白刺属植物与红柳混合分布区表层土壤有机质含量与pH、Ca2+呈0.05水平显著负相关,中层土壤有机质含量与Mg2+呈0.05水平显著正相关,下层土壤有机质含量与pH呈0.05水平显著正相关。结论]该研究可以为博斯腾湖周围生态环境的可持续发展提供合理的科学依据。

Study on Spatial Distribution Characteristics of Soil Organic Matter in Nitraria around Bosten Lake

Objective] The research aimed to study the statistics characteristics and distribution characteristics of soil organic matter and its correlation with soil salinity , pH and other indicators. Method ] The distributions of soil organic matter in Nitraria distribution area, Nitraria and Populus hybrid distribution area, Nitraria and the tamarisk mixed distribution area in Hoxud County were studied. Result] Each distribu- tion of the organic matter content of the soil at different depths in turn were surface 〉 mid-level 〉 lower level. Organic matter content reduced with the increase of depth. The distribution pattern of the surface soil organic matter level was Nitraria and Populus hybrid distribution area 〉 Nitraria distribution area 〉 Nitraria and tamarisk mixed distribution area. The vertical distribution pattern of soil organic matter was that soil organic matter content of all three distribution presented a decreasing trend from the surface to the lower, but decreased in varying degrees. The surface soil organic matter and total salt content in Nitraria distribution area had significant positive correlation. The mid-level soil organic matter and Ca^2＋ , K ^＋ ＋ Na ^＋ had a significant positive correlation. Lower level soil organic matter and Mg^2＋ , K ^＋ ＋ Na ^＋ and pH had significant inverse correlation. In Nitraria and Populus hybrid distribution area, surface soil organic matter and the full amount of salt and Ca^2 ＋ had significant positive correlation, the mid-level soil organic matter had significant positive correlation with Ca^2＋ , while had significant inverse correlation with others. Lower level soil organic matter had significant positive correlation with every variable. For the Nitraria and tamarisk mixed distribution area, the surface soil organic matter, pH and Ca^2＋ had significant inverse correlation, mid-level soil organic matter and Mg^2＋ had a significant positive correlation, and lower level soil organic matter had significant positive correlation with the pH. Conclusion ] The research could provide the reasonable and scientific basis for the sustainable development of the coo-environment around Bosten Lake.