生态学报2018，Vol.38Issue(7)：2323-2332,10.DOI:10.5846/stxb201704290787
增温和施氮对亚热带杉木人工林土壤溶液养分的影响
The effects of warming and nitrogen addition on soil nutrients in the soil solutions from a subtropical Cunninghamia lanceolata plantation
摘要
Abstract
Climate change can alter soils by causing warming and nitrogen deposition.It is not clear whether the nutrient supply balance in the soil solution plays an important role in accelerating or weakening soil nutrient cycling.The aim of this study was to analyze the effects of warming and nitrogen addition on nutrients in the soil solutions taken from a subtropical Cunninghamia lanceolata plantation.Soil solution collectors were installed at soil depths of 0-15,15-30,and 30-60cm in every sample plot.The soil solutions were collected using the negative pressure supplied by a vacuum pump,and the dynamic changes to the organic and inorganic components were analyzed for two years.The results showed that warming and warming+N addition significantly inhibited the dissolved total nitrogen (DTN) and NO3-concentrations in all the soil layers,and N addition had no significant effect on them due to the increase in mass vegetation absorption of these nutrients.In general,the short-term treatments of warming and N addition significantly decreased the concentrations of dissolved organic carbon (DOC),but had little effect on the K+,Ca2+,Na+,and Mg2+ concentrations in the soil solution.However,the effect of warming on the mineral elements in the soil solution was much greater than that of N addition.Warming increased the soil pore-size and permeability,which greatly promoted Fe3+ and Al3+ leaching and decreased Na+ and Mg2+concentrations in the surface soil.The interaction between warming and N addition may have a combined effect that is more than the simple addition of a single factor.Therefore,further long-term monitoring to understand the internal mechanism of soil nutrient response to future climate change is needed.关键词
增温/施氮/土壤溶液/养分动态Key words
warming/nitrogen addition/soil solution/nutrient dynamics引用本文复制引用
元晓春,杨景清,王铮,袁硕,杨舟然,陈岳民,杨玉盛..增温和施氮对亚热带杉木人工林土壤溶液养分的影响[J].生态学报,2018,38(7):2323-2332,10.基金项目
国家自然科学基金项目(31670620,U1505233) （31670620,U1505233）
福建省科技厅科技项目(2016R1032-2) （2016R1032-2）
