|本期目录/Table of Contents|

[1]高丽楠.放牧对川西北高寒草甸植被生物量及土壤氮素的影响[J].江苏农业科学,2018,46(15):226-231.
 Gao Linan.Impacts of grazing on plant biomass and soil nitrogen content in alpine meadow of northwestern Sichuan[J].Jiangsu Agricultural Sciences,2018,46(15):226-231.
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放牧对川西北高寒草甸植被生物量及土壤氮素的影响(PDF)
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《江苏农业科学》[ISSN:1002-1302/CN:32-1214/S]

卷:
第46卷
期数:
2018年第15期
页码:
226-231
栏目:
资源与环境
出版日期:
2018-08-05

文章信息/Info

Title:
Impacts of grazing on plant biomass and soil nitrogen content in alpine meadow of northwestern Sichuan
作者:
高丽楠
成都大学旅游与经济管理学院,四川成都 610106
Author(s):
Gao Linan
关键词:
全氮季节高寒草甸生物量放牧
Keywords:
-
分类号:
S812;S181
DOI:
-
文献标志码:
A
摘要:
以青藏高原东部的高寒草甸为研究对象,研究不同季节和放牧强度下,高寒草甸植物生物量、植物全氮和土壤全氮含量之间的差异性,为高寒草甸区域的植被恢复提供理论依据。结果表明,高寒草甸植物地上部和地下部生物量均随着放牧强度的增加而呈下降趋势,表现为围封型(浅丘山地灌丛,US)>适度放牧型(浅丘山地草甸,UM)>重度放牧型(丘前阶地草甸,TM);US和UM的地上部生物量的季节动态均呈现逐渐增加的趋势,但TM地上部生物量的季节动态呈增加→降低的趋势,TM地上部生物量变化范围为94.91~191.93 g/m2。US、UM和TM的地上部生物氮、凋落物氮和地下部生物氮均随生长季的推移呈先降后升的V型变化。在0~40 cm土层,US、UM和TM的土壤全氮含量随土层深度的增加而减少;UM的土壤全氮随生长季节变化呈现逐渐增加的趋势,而US和TM土壤全氮则呈先减少后缓慢增加的趋势;随着放牧强度的增加,土壤全氮含量呈现逐渐降低趋势。高寒草甸重度放牧会降低植物生物量以及土壤氮素流失,易导致草甸退化。
Abstract:
-

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备注/Memo

备注/Memo:
收稿日期:2017-06-07
基金项目:四川省教育厅自然科学基金(编号:13ZB0346);四川景观与游憩研究中心项目(编号:JGYQ2015009)。
作者简介:高丽楠(1983—),女,内蒙古呼伦贝尔人,博士,讲师,主要从事生态资源开发与保护等研究。E-mail:gaolinan20081212@163.com。
更新日期/Last Update: 2018-08-05