不同土层深度的柠条锦鸡儿林土壤有机质分析

研究柠条锦鸡儿(Caragana Microphylla Lam.)林地不同林龄及土层深度土壤有机质含量，为进一步深入研究北方农牧交错带土壤有机碳及地区植被建设提供依据。笔者通过野外调查和室内分析相结合的方法，对赤峰市敖汉旗风沙土区不同林龄柠条锦鸡儿（5、11、17、23、29年）不同土层的土壤有机质作了分析。分析表明：相同林龄不同立地条件的土壤有机质含量随着土层深度的增加呈先增加后减少的趋势；不同立地条件相同林龄的土壤有机质含量大小为丘间低地＞阴坡＞阳坡；相同立地条件不同林龄的土壤有机质含量随林龄的增加而增加。

Soil Organic Matter of Caragana microphylla Lam. Forest of Different Ages

The paper aims to study soil organic matter of different soil depths under different ages of Caragana microphylla Lam. forest, and provide a theoretical basis for further research on soil organic carbon and regional vegetation construction in transition zone between cropping area and nomadic area in north China. The authors combined the methods of field investigation and laboratory analysis, analyzed soil organic matter of different soil layers under different ages (5, 11, 17, 23 and 29 a) of Caragana microphylla Lam. forest in Aohan Banner, Chifeng sandy soil area. The results showed that soil organic matter of the same age forest under different site conditions first increased and then decreased with the increase of soil depth;soil organic matter under the same site condition of different forest ages followed the order of dune-lowland>shady-slope>sunny-slope;soil organic matter under the same site condition of different forest ages increased with the forest age.