山区小流域不同海拔和坡位土壤养分分布及相关性分析  

The Distributing of Soil Nutrients and Correlation Analysis in Different Altitudes and Slope Positions in Mountain Watershed

作　　者：郜文军[1] 王印传[1] 霍习良[1] 杨杰[1] 

机构地区：[1]河北农业大学资源与环境科学学院,保定071001

出　　处：《中国农学通报》2008年第3期248-252,共5页Chinese Agricultural Science Bulletin

基　　金：河北农业大学博士基金资助(2004)

摘　　要：通过对河北省易县观坐岭小流域不同海拔和坡位土壤有机质、速效氮、速效磷、速效钾测定分析,得出了该小流域土壤在不同海拔和坡位的肥力状况。结果表明:随海拔降低,土壤有机质和速效氮含量有增加趋势,增幅分别为40%和35%;土壤速效磷和速效钾的变化比较复杂,主要与土壤母质有关。不同坡位土壤养分表现出向下汇集的趋势,下坡位土壤养分含量高于上坡位和中坡位养分含量,但有机质变化趋势相反,是人为活动的影响结果。相关分析结果表明,海拔与土壤有机质、速效氮和速效钾呈显著负相关,与速效磷不相关;各养分含量间,土壤有机质、速效氮、速效钾之间分别呈相关关系,速效磷与速效氮相关显著,与速效钾无相关性。在不同坡位上,土壤养分间的差异不显著。By analyzing SOM, available N, available P, available K in different altitudes and slope positions i,n Guan Zuoling small watershed in Yi Xian of Hebei, the statuses of fertility were studied. The results showed SOM and available N have an increasing trend as altitude decreasing, the increase amplitudes are 40% and 35% respectively; the changes of available P and available K are comparatively complicated, they are significantly correlated with soil parent materials. Soil nutrients had a tend of influxing to the bottom in different slope positions, the contents of soil nutrients in below slope are higher than other slopes, but S0M has reverse tend, It is a result of artificial activities. Correlation analysis result showed, there are significant negative correlation between altitudes and SOM, available N, available K, no correlation is showed between altitudes and available P, A remarkable correlation are seen among the SOM, available N and available K, there is a significant correlation between available N and available P, no correlation is showed between available P and available K. The differences of soil nutrients are not remarkable in different slope positions.

关 键 词：小流域 海拔 坡位 土壤养分 

分 类 号：S158.3[农业科学—土壤学]