摘要
在丹江鹦鹉沟小流域利用典型样地取样法,进行土样采集,共选取78样点,测定土壤4个不同深度的养分含量。应用传统统计学和地统计学的方法,对不同深度土壤总氮含量进行了分析。结果表明:土壤总氮含量均值、最大值和最小值均表现为A1>A2>A3>A4,随土壤深度的增加而降低。经Kriging插值分析,由A1到A4总氮分布逐渐由小的斑块向大的斑块转变,总氮变化范围逐渐变小,同时A1土壤总氮含量表现为农地<栎树林<菜地<草地<松林<竹林。有机氮在总氮中占主要部分,其平均百分比高达90%以上。土壤碳氮比总体表现为农地小于林地。坡向与A1、A2和A4土壤总氮含量均呈显著相关,总氮含量表现为坡顶<阳坡<阴坡<平地。
By means of typical spot samples,78 soil spots were chosen in Yingwugou watershed.The contents of soil nutrient were determined for each soil sample of 4 different soil depths.Both traditional and geostatistics methods were applied to analyze TN in 4 different soil depths.The results indicated that TN contents（mean,maximum,minimum） were all A1A2A3A4.With the increasing of depths,the TN content reduced.The Kriging interpolation shown that the TN from A1 to A4 changed from small patches to large patches and the range of total nitrogen became smaller.The TN content was farmlandoak landvegetable yieldgrass landpine land bamboo land in A1.Total organic nitrogen was the main part in total nitrogen with the average percentage as high as 90% above.Soil C/N of the agricultural land was smaller than that of the forest.Aspect and TN in A1,A2 and A3 shown remarkable relevance.The TN content was up slopesunny slopeshady slopeflat area.
出处
《水土保持学报》
CSCD
北大核心
2011年第5期59-63,共5页
Journal of Soil and Water Conservation
基金
陕西省教育厅丹汉江水源区水土流失非点源污染过程与调控项目(09JS094)
国家自然科学基金"植被格局对坡沟水蚀过程调控机理研究项目"(41071182)
