关帝林区河岸林土壤全磷生长季变化对外源磷输入的响应  

Effects of External Phosphorus Inputs on Soil Total Phosphorus of Three Typical Riparian Forests in Guandi Mountain

作　　者：王卫锋[1] 单凯[1] 张芸香[1] 郭晋平[1] 

机构地区：[1]山西农业大学林学院,山西太谷030801

出　　处：《山西农业大学学报（自然科学版）》2015年第3期301-305,共5页Journal of Shanxi Agricultural University(Natural Science Edition)

基　　金：国家自然科学基金(30970480);山西农业大学引进人才博士基金(2013YJ18);山西农业大学科技创新基金(2014001)

摘　　要：河岸林的氮磷滤除作用是流域生态系统的重要过程。为进一步明确河岸林的磷素滤除机制及其影响因素,本研究以山西省关帝山文峪河上游华北落叶松林、杨桦林及云杉林3种典型河岸林为对象,研究了外源磷输入梯度下3种河岸林土壤全磷含量的时空变异特征及其林型间差异。研究结果表明,自然状态下3种河岸林土壤全磷含量存在差异,华北落叶松林最低,云杉林最大。5月初施加磷肥之后,3种河岸林土壤全磷含量随着时间的变化表现相似的趋势,即随月份增加而逐渐降低;但林型间土壤全磷含量下降速率存在差异,华北落叶松林下降速率最快,云杉林下降速率最慢。8月份之后,随着磷输入剂量增加华北落叶松林各磷输入梯度之间无差异,但云杉林土壤全磷含量随磷输入剂量不断增加。通过土壤全磷含量和土壤其他性质进行相关分析表明,土壤容重、pH及有机质含量可能是影响河岸林土壤全磷含量变化的主要因素。The role of riparian forests as nutrient filters is an important process in watershed ecosystem.To further define the mechanism and the influence factors of this process,this study chose three typical riparian forests （Larix principis-rupprechtii coniferous forest,Betula platyphylla broad-leaved forest and Picea meyeri coniferous wood） in Wenyu river on the Guandi Mountain of Shanxi province as research materials.The spatial and temporal variation features of soil total phosphorus content （TP） in these riparian forests under phosphorus inputs and their difference were studied.The results showed that the soil total phosphorus content among the three forest types had difference without phosphorus input.The soil TP of larch forest was lowest and that of spruce forest was highest after applying phosphate fertilizer in early may.And the soil TP of three riparian forests showed the same trend after phosphorus input treatments,which continued to decline before middle of August.But the soil TP of larch forest declined most quickly and spruce forest most slowly.The increase of the TP of larch forest did not have difference among different phosphorus input gradients.However,the soil TP of spruce forest were significantly increased with phosphorus input gradients.Correlationship analyses showed that soil bulk density,soil pH and organic matter may be the major factors for soil TP changes in riparian forests.

关 键 词：河岸林 土壤全磷 磷输入 关帝山 

分 类 号：S718.55[农业科学—林学]