小流域自然土壤与耕作土壤养分比较及影响因素分析  

Nutrient Comparison between Natural Soils and Cultivated Soils and Their Influencing Factors in Small Watershed

作　　者：郜文军[1] 王印传[1] 陈飞[1] 杨杰[1] 霍习良[1] 

机构地区：[1]河北农业大学资源与环境科学学院,河北保定071001

出　　处：《山地学报》2008年第5期632-638,共7页Mountain Research

基　　金：河北农业大学博士基金项目(2004)~~

摘　　要：通过对河北省易县观坐岭小流域自然土壤和耕作土壤有机质、速效氮、速效磷、速效钾及微量元素有效含量的测定分析,得出了该小流域自然土壤和耕作土壤的肥力状况。结果表明:自然土壤中有机质和速效氮含量处于较高水平;速效钾含量丰富,速效磷比较缺乏;有效Fe、Mn含量处于高水平,有效Cu、Zn含量中等。自然土壤开垦为耕作土壤后,有机质和速效氮含量下降;由于施肥原因,速效磷含量明显增高;速效钾含量因母质影响有所下降。海拔与土壤养分变化的相关性不明显,不同坡位土壤养分表现出向下汇集的趋势。并从自然环境、人为影响、地形母质等方面分析土壤养分变化的影响因素。By analyzing SOM, available N, available P, available K and microelements between natural soils and cultivated soil in Guan Zuoling small watershed in Yi Xian of Hebei, the statuses of fertility were studied. The results showed SOM and available N were at higher level; available K was at abundant level and available P was absent comparatively. Available Fe, Mn were at high level and available Cu, Zn were at middle level in natural soils. Compared with natural soil, SOM and available N decreased in cultivated soil, available P increased distinctly on account of fertilization and available K was decreased somewhat because of the influence of parent material. The correlation between altitude and the change of soil nutrient was no remarkable, soil nutrients had a tend of influxing to the bottom in different slope positions. Influence factors of change of soil nutrients were also analyzed from natural environment, human effect, terrain and parent material aspects.

关 键 词：小流域 自然土壤 耕作土壤 土壤养分 

分 类 号：S158.3[农业科学—土壤学]