增水对青藏高原高寒草甸生态系统表层土壤碳氮的影响

doi:10.13466/j.cnki.lyzygl.2018.06.016

林业资源管理 ›› 2018›› Issue (6): 99-105.doi: 10.13466/j.cnki.lyzygl.2018.06.016

增水对青藏高原高寒草甸生态系统表层土壤碳氮的影响

李凤滋¹^,²(), 旭日¹()

1.中国科学院青藏高原研究所高寒生态重点实验室,北京 100101
2.内蒙古大学生态与环境学院,呼和浩特 010021

收稿日期:2018-10-09 修回日期:2018-11-09 出版日期:2018-12-28 发布日期:2020-09-27
通讯作者: 旭日
作者简介:李凤滋(1993-),女,内蒙古巴彦淖尔人,硕士,研究方向:全球变化生态学。Email: fengzili0605@126.com
基金资助:
中国科学院战略性先导科技专项(XDA20050102);中国科学院战略性先导科技专项(XDA2005010202);国家自然科学基金(41175128);国家自然科学基金(41575152);国家自然科学基金(41775161)

The Effect of Precipitation Increase on Topsoil Carbon and Nitrogen in an Alpine Meadow Ecosystem on the Tibetan Plateau

LI Fengzi¹^,²(), XU Ri¹()

1. Key Laboratory of Alpine Ecology,Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100101,China
2. The School of Ecology and Environment,Inner Mongolia University,Hohhot,010021,China

Received:2018-10-09 Revised:2018-11-09 Online:2018-12-28 Published:2020-09-27
Contact: XU Ri

摘要/Abstract

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。

关键词: 增水, 土壤碳, 土壤氮, 高寒草甸生态系统, 青藏高原

Abstract:

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 $NO^{-}_{3}$ -N was decreased (P>0.05).The results showed that short term precipitation increase did not cause the significant change of TC/TN.

Key words: precipitation increase, soil carbon, soil nitrogen, alpine meadow, Tibetan Plateau

中图分类号:

S812.2

李凤滋, 旭日. 增水对青藏高原高寒草甸生态系统表层土壤碳氮的影响[J]. 林业资源管理, 2018,(6): 99-105.

LI Fengzi, XU Ri. The Effect of Precipitation Increase on Topsoil Carbon and Nitrogen in an Alpine Meadow Ecosystem on the Tibetan Plateau[J]. FOREST RESOURCES WANAGEMENT, 2018,(6): 99-105.

图/表 4

参考文献 41

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增水对青藏高原高寒草甸生态系统表层土壤碳氮的影响

The Effect of Precipitation Increase on Topsoil Carbon and Nitrogen in an Alpine Meadow Ecosystem on the Tibetan Plateau

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