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干旱区地理 ›› 2012, Vol. 35 ›› Issue (04): 594-598.

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祁连山青海云杉林土壤养分异质性分析

张平1,刘贤德1，2,车宗玺2,成彩霞2   

  1. 1甘肃农业大学，甘肃兰州730070；2甘肃省祁连山水源涵养林研究院，甘肃张掖734000
  • 收稿日期:2011-12-03 修回日期:2012-01-28 出版日期:2012-07-25
  • 作者简介:张平（1963-），男，博士，研究员，主要研究方向为森林生态、水文、生物多样性土壤养分循环等
  • 基金资助:

    西北五个优势树种生态服务功能分布式定位观测与研究（201204101-4）

Heterogeneity of soil nutrient of Qinghai spruce(Picea crassifolia) forest in the Qilian Mountains

ZHANG Ping1，LIU Xiande1，2，CHE Zongxi2，CHENG Caixia2   

  1. 1Gansu Agricultural University, Lanzhou 730070,Gansu,China;2Academy of Water Resource Conservation Forests in Qilian Mountains of Gansu Province，Zhangye 734000
  • Received:2011-12-03 Revised:2012-01-28 Published:2012-07-25

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摘要： 阐明土壤养分的变异特性对改变森林群落结构和加快生态系统进程有重要意义。该研究选择东西祁连山为主要调查区域，通过变异函数确定和比较变量因子的空间变异程度及空间变异尺度，采用Palintest土壤养分测试仪和实验室化学处理方法获取试验数据，对数据采用DPS7.5和EXCEL软件处理，利用变异函数对祁连山地区6种土壤养分的空间变异特征分析表明：均表现出明显的空间自相关格局，空间自相关范围差异明显；TN、TP、TK、NH+4-N、NO-3-N、有机质变异系数分别为37.6%、23.1%、4.6%、36.3%、109.9%、32.9%，其中，TK为弱变异，TN、TP、NH+4-N和有机质为中等变异，NO-3-N为强变异；NH+4-N、NO-3-N、有机质、TN在剖面上的变化呈递减对数，TP、TK呈递增对数；NH+4-N在海拔上呈多项式变化关系，NO-3-N呈线性变化关系，TN、TP、TK无明显变化，变化范围分别在0.19%～0.4%、 0.043%～0.056%、1.85%～2.014%之间。

关键词: 土壤养分, 异质性, 青海云杉, 祁连山

Abstract: The variability characteristics of soil nutrients play important role in the variation of the forest community structure and the evolution of ecosystem processes. The Qilian Mountains was selected as the study area and aims to analyze the variation characteristics of soil nutrients in the study area, the samples were unbiasedly selected during the fields work. The variation functions were used to quantify the extent and scale of the variation, the data were obtained using Palintest soil nutrient test Kits, laboratory analysis provided the necessary data related to the environmental variables. The data were analyzed using DPS 7.5 and EXCEL software. As to the soil nutrient, some conclusions are as follows: the autocorrelation exists among six soil types, obvious difference can be detected; The variation coefficients of TN，TP，TK，NH+4-N，NO-3-N and organic are 37.6%，23.1%，4.6%，36.3%，109.9% and 32.9%, respectively. Among these variations, the TK is relatively weak, TN，TP，NH+4-N are moderate, and NO-3-N are relatively strong. The changes of NH+4-N，NO-3-N，organic and TN in the section show a logarithmic decrease trend, and TP，TK show a logarithmic increase trend, NH+4-N and NO-3-N show a multinomial change with the altitude and a linear change, respectively. Variation ranges of TN，TP and TK are 0.19%-0.4%， 0.043%-0.056% and 1.85%-2.014%, respectively, and their changes are not obvious.

Key words: soil nutrient, variation characteristic, Qinghai spruce, Qilian Mountains

中图分类号: 

  • S158.3