摘要
通过人为多梯度增加降水的控制实验,观察高寒草甸生态系统中表层(-10cm)土壤碳(Total Carbon,TC)氮(Total Nitrogen,TN)对降水增加的响应。结果显示:3年5个梯度的增水处理未引起表层土壤碳氮产生显著的变化,但2014年和2015年在增水40%和增水80%处理下,土壤总碳、土壤总氮有一定增加(P>0. 05);表层土壤铵态氮总体有增加的趋势(P> 0. 05),硝态氮总体有减少的趋势(P> 0. 05)。表明短期的增水处理不会引起表层土壤碳氮发生显著变化。
By control experiments of artificially increasing precipitation,we observe the response of topsoil(-10cm)total carbon(TC)and total nitrogen(TN)to precipitation increasing in the alpine meadow ecosystem.The results showed that the experiment with three years of five gradient precipitation increase treatments had no significant effect on surface TC/TN,but TN and TC has increase with the precipitation increase treatment of 40%and 80%in 2014 and 2015(P﹥0.05).There was an overall increase in NH+4-N in the topsoil(P﹥0.05)while NO3^--N was decreased(P﹥0.05).The results showed that short term precipitation increase did not cause the significant change of TC/TN.
作者
李凤滋
旭日
LI Fengzi;XU Ri(Key Laboratory of Alpine Ecology,Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100101,China;The School of Ecology and Environment,Inner Mongolia University,Hohhot,010021,China)
出处
《林业资源管理》
北大核心
2018年第6期99-105,共7页
Forest Resources Management
基金
中国科学院战略性先导科技专项(XDA20050102
XDA2005010202)
国家自然科学基金(41175128
41575152
41775161)
关键词
增水
土壤碳
土壤氮
高寒草甸生态系统
青藏高原
precipitation increase
soil carbon
soil nitrogen
alpine meadow
Tibetan Plateau
