不同林龄柠条锦鸡儿土壤有效磷的变化

Soil Available Phosphorus Change of Caragana Microphylla Lam. with Different Stand Ages

研究柠条锦鸡儿(Caragana Microphylla Lam.)林地不同土层深度土壤有效磷的变化规律,为进一步深入研究北方农牧交错带土壤性质及地区植被建设提供依据。笔者通过野外调查和数据处理,对赤峰市敖汉旗风沙土区不同林龄(5、11、17、23、29年)柠条锦鸡儿不同土层的土壤有效磷进行了分析。研究表明:相同林龄不同立地条件的土壤有效磷含量随土层厚度的增加呈现减小的趋势;相同林龄不同立地条件的土壤有效磷含量大小表现为丘间低地>阴坡>阳坡;相同立地条件不同林龄的土壤有效磷含量随林龄的增加而增加。柠条锦鸡儿的种植有利于土壤性质向良性方向发展。

The paper aims to research soil available phosphorus in different soil layers of Caragana Microphylla Lain. forest, and provide a theoretical basis for further study soil property and regional vegetation construction in farming-pastoral zone in north China. Field investigation and laboratory analysis were used to analyze soil available phosphorus in different soil layers of Caragana microphylla Lam with stand ages of 5, 11, 17, 23 and 29 years. The results showed that soil available phosphorus of the same stand age but different site conditions decreased with the increase of soil depth, which showed the order of dune lowland 〉 shady slope 〉 sunny slope; Soil available phosphorus of the same site condition but different stand ages increased with the increase of stand age. The cultivation of Caragana microphylla Lam was conducive to the improvement of soil properties.