[1]鄢 燕,马星星,鲁旭阳.人为干扰对藏北高寒草原群落生物量及其碳氮磷含量特征的影响[J].山地学报,2014,(04):460.
　YAN Yan,MA Xingxing,LU Xuyang.Effect of Human Disturbance on Plant Biomass and CNP Contents of the Alpine Steppe in Northern Tibet[J].Mountain Research,2014,(04):460.
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人为干扰对藏北高寒草原群落生物量及其碳氮磷含量特征的影响()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2014年04期
页码:
460
栏目:
青藏高原植被
出版日期:
2014-04-01

文章信息/Info

Title:
Effect of Human Disturbance on Plant Biomass and CNP Contents of the Alpine Steppe in Northern Tibet
作者:
鄢 燕; 马星星; 鲁旭阳
1. 中国科学院水利部成都山地灾害与环境研究所山地表生过程与生态调控重点实验室,四川 成都 610041；
2.中国科学院大学，北京 100049
Author(s):
YAN Yan; MA Xingxing; LU Xuyang
1.Key Laboratory of Mountain Surface Processes and Ecological Regulation,Institute of Mountain Hazards and Environment, Chinese Academy of Sciences,Chengdu 610041,China;
2.University of Chinese Academy of Sciences,Beijing 100049,China
关键词:
退牧还草; 高寒草原; 生物量; 植物碳氮磷
Keywords:
grazing withdrawal project; alpine steppe;  plant biomass; CNP contents
分类号:
Q142
文献标志码:
A
摘要:
退牧还草工程是国家为改善草原生态环境和促进牧区经济持续发展而实行的一项战略性工程，禁牧和休牧措施是其主要措施。以藏北高寒草原申扎区域的退牧还草工程为研究对象，分别选取禁牧围栏样地、休牧围栏样地和围栏外的一块自由放牧样地，比较分析这三种人为干扰下的放牧样地的生物量及其碳氮磷含量的特征。结果表明：休牧样地地上和地下生物量分别为35.69 g/m2和237.11 g/m2，均显著高于禁牧样地（22.48 g/m2和15122 g/m2）和自由放牧样地（25.27g/m2和96.37 g/m2）。植物中碳氮磷含量，地上部分禁牧样地含碳量最高，植物氮、磷含量自由放牧样地最高；地下部分碳、氮含量差异不明显，P含量自由放牧最高。说明植物生物量大小与植物体内碳氮磷元素含量大小无相关关系。对于禁牧样地，在长期围栏封育的同时，应适当的添加P元素或N、P元素；而休牧样地，在短期围栏封育时，可添加适当的N元素。
Abstract:
The “grazing withdrawal project”is a key national undertaking projectwith aims to develop the western region,which is one of the major ecological construction project suported by the government.Protective measuresin the project,such as grazing bans and intermittent grazing,are usedto rehabilitate grassland vegetation and to improve grassland productivity. Those methods were for the benefit of pastoral development andachieving a sustainable cycle of ecological development. In order to investigate the effects of the project on plant biomass and carbon (C)、nitrogen(N) and phosphorous(P) content,three plots were selectedat Xainza Alpine Steppe and Wetland Ecosystem Observation Station in April,2013.The first plot is free grazing grassland(FG).The second plot is enclosed from May to July(SG),and the third plot is enclosed for 4-5 years (EG).The result shows that the aboveground and belowground biomass at SG (35.69 g/m2 and 237.11 g/m2)are significantly higher than those at EG (22.48 g.m2 and 151.22 g/m2) and FG(25.27 g/m2 and 96.37 g/m2).The content of C in aboveground part is the highest in EG ,the content of N and P in aboveground part are the highest in FG.The C and N content of the underground part have no significant differenceamong three plots. There are also no significant correlationship between aboveground biomass and the C,N,P content. Those results suggest that it should add P element for the long term enclosed grassland and add N element for the short term enclosed grassland, which is benefit for the plant growth.

相似文献/References:

[1]蔡延江,杜子银,王小丹,等.牲畜排泄物返还对藏北高寒草原土壤CH4排放的影响[J].山地学报,2014,(04):393.
　CAI Yanjiang,DU Ziyin,WANG Xiaodan,et al.Effects of Excretal Returns on CH4 Emissions from an Alpine Steppe Soil in Northern Tibet, China[J].Mountain Research,2014,(04):393.
[2]曹樱子,王小丹.藏北高寒草原土壤粒径分布分形维数特征[J].山地学报,2014,(04):438.
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备注/Memo

备注/Memo:
收稿日期(Received date)：2013-12-21；改回日期(Accepted) : 2014-05-05。
基金项目（Foundation item）：中国科学院战略性先导科技专项（B类）(XDB03030505)；国家自然科学
基金项目（41201053）和中科院成都山地所‘一三五’项目（SDS-135-1203-02）资助。\[Supported by "Strategic Priority Research Program" of the Chinese Academy of Sciences (XDB03030505), National Natural Science Foundation of China (41201053) and the 135 Strategic Program of the Institute of Mountain Hazards and Environment (SDS-135-1203-02).\]
作者简介（Biography）：鄢燕（1978- ），女，四川西昌人，博士，主要从事草地生态学研究。\[Yan Yan (1978-), female, Ph D, born in Xichang,Sichuang Province, specialized in grassland ecology.\] E-mail: yy@imde.ac.cn
更新日期/Last Update: 1900-01-01