黄土沟壑区不同土地利用方式下土壤养分及其与土壤颗粒组成关系  

Distribution of soil nutrient under different land use and relationship between soil nutrient and soil granule composition in Loess hilly region

作　　者：张宏[1,2] 刘建军[3,2] ZHANGH Hong LIU Jian-jun(College of Forestry College of Landscape Architecture and Arts, Northwest A ＆ F University, Yangling 712100, Shanxi, China Helan Mountains Forest Ecosystem Research Station ofNingxia, Yinchuan 750000, Ningxia, China)

机构地区：[1]西北农林科技大学林学院,陕西杨凌712100 [2]宁夏贺兰山森林生态系统国家定位观测研究站,宁夏银川750000 [3]西北农林科技大学风景园林艺术学院,陕西杨凌712100

出　　处：《中南林业科技大学学报》2016年第11期80-85,共6页Journal of Central South University of Forestry & Technology

基　　金：国家科技支撑计划课题"困难立地植被恢复技术研究与示范"(2015BAD07B02)

摘　　要：对黄土高原丘陵沟壑区不同土地利用方式下土壤表层及剖面养分的分布特征及其与颗粒含量之间的关系进行了研究,结果表明:(1)乔木林地表层土壤具有较高的氮素、有机质及全钾(与灌木林地、草地、农田均达到了极显著差异);农田表层土壤具有较高的磷素及速效钾;乔木林地、灌木林地、草地及农田土壤有机质均随土壤深度的增加呈几何级数下降;土壤氮素在不同土地利用方式中的变化情况与有机质一致;农田磷素含量高于其它3种土地利用方式;不同土地利用方式下土壤钾素含量差异不显著,乔木林地土壤全钾含量略高,农田土壤的速效钾含量高于其它3种土地利用方式。(2)通过对土壤不同粒级与土壤养分的相关性分析,土壤各粒级(粉粒除外)与土壤养分之间具有显著相关作用;其中土壤的碳、氮和钾含量均与粘粒含量呈正相关,与砂砾含量呈负相关,磷含量则相反。Distribution of soil nutrient content and relationship between soil nutrient and soil granule composition in Loess hilly region. The results were as follows： （1） For N, organic matter or total K, the contents of woodland were the higher, which had the significant difference from other land use types （at 95% level）; for P and available K, the farmland were the higher; the profile organic matter of all land use types with geometric series as the depth of soil increased; the N had same variation with the organic matter in different land use types; the P of farmland was higher than other 3 land use types; the K was not significant difference in different land use types, the woodland had the higher total K, farmland had the higher available K than other 3 land use types. （2） The correlation analysis to different particle and soil nutrient showed that different particle had the significance correlation with soil nutrient （exit silt particle）; the organic matter, N or K were positively correlated with clay particle, were negatively correlated with sand particle, the P was opposite.

关 键 词：土地利用方式 土壤养分 分布特征 土壤颗粒组成 

分 类 号：S714.8[农业科学—林学]