南水北调与水利科技2017，Vol.15Issue(4)：87-93,7.DOI:10.13476/j.cnki.nsbdqk.2017.04.015
毛乌素沙地典型湖滨带湿地有机碳、氮素空间分布特征
Spatial distribution characteristics of organic carbon and nitrogen in typical lake littoral wetland of Mu Us Sandland
摘要
Abstract
This study was aimed to analyze the spatial distribution characteristics of soil organic carbon and nitrogen in soils from typical lake littoral wetland of Mu Us Sandland in Shaanxi Province and to provide a scientific basis for studying the way in which wetland ecosystem plays its special function in desertified environment.We collected soil samples from A-F zones along Baxiacaidang Lake and measured the contents of soil organic carbon,total nitrogen,organic nitrogen,nitrate nitrogen,and ammonium nitrogen.Soil organic carbon and nitrogen distribution were analyzed by ANOVA,Spearman correlation coefficients,and principal components analysis.At the depth of 0-10 cm,the contents of soil organic carbon and total nitrogen would increase with the increasing water level.Regarding vertical distribution,except for ammonium nitrogen,the contents of soil organic carbon,total nitrogen,organic nitrogen,and nitrate nitrogen would all decrease with the increasing soil depth.The contents of soil organic carbon and total nitrogen were significantly and positively correlated with total phosphorus,volume weight of soil,soil moisture content,and water level.The content of soil ammonium nitrogen was significantly and positively correlated with total phosphorus,soil moisture content,volume weight of soil,total nitrogen,organic carbon,and water level.Between nitrate nitrogen and microbial biomass carbon,the correlation coefficient was 0.637;between nitrate nitrogen and microbial biomass nitrogen,the correlation coefficient was 0.617.The contents of soil organic carbon and nitrogen were not significantly correlated with soil clay content.The cumulative contribution rate of the three principal components was 76.15%.Total phosphorus,soil moisture content,volume weight of soil,and water level were major factors which can affect the spatial distribution of soil organic carbon and nitrogen distribution.关键词
湖滨带/有机碳/全氮/分布特征/水位Key words
lake littoral zone/soil organic carbon/total nitrogen/distribution characteristics/water level分类
农业科技引用本文复制引用
张雪冰,闫玉琴,陈国静,申卫博,王国栋..毛乌素沙地典型湖滨带湿地有机碳、氮素空间分布特征[J].南水北调与水利科技,2017,15(4):87-93,7.基金项目
中央高校基本科研业务费专项(2452015094) （2452015094）
中央财政农业技术推广专项:水利部公益性行业科研专项(201501045) Central University Basic Research Business Expenses Special(2452015094)Northwest Agriculture and Forestry University doctoral Foundation(2014BS197)；Central Government Agricultural Technology Extension:Ministry of Water Resources Public Welfare Industry Research(201501045) （201501045）
