Responses of Leymus chinensis Individual Traits to Different Grazing Patterns

doi:10.11733/j.issn.1007-0435.2014.05.006

Acta Agrestia Sinica ›› 2014, Vol. 22 ›› Issue (5): 949-953.DOI: 10.11733/j.issn.1007-0435.2014.05.006

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Responses of Leymus chinensis Individual Traits to Different Grazing Patterns

WEI Xiao-ting¹, LIU Yue-hua¹, ZHONG Meng-ying¹, WU Rui-xin^1,2, PAN Duo¹, SHAO Xin-qing¹

1. Grassland Science Department, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China;
2. Pratacultural college, Gansu Agricultural University, Lanzhou, Gansu Province 730070, China

Received:2014-04-16 Revised:2014-06-18 Online:2014-10-15 Published:2014-09-30

羊草个体性状对不同放牧模式响应的研究

位晓婷¹, 刘月华¹, 钟梦莹¹, 武瑞鑫^1,2, 潘多¹, 邵新庆¹

1. 中国农业大学动物科技学院草地研究所, 北京 100193;
2. 甘肃农业大学草业学院, 甘肃兰州 730070

通讯作者: 邵新庆
作者简介:位晓婷（1989-），女，河北石家庄人，硕士研究生，主要从事退化草地恢复研究，E-mail：weixiaoting6@163.com;
基金资助:
公益性行业（农业）科研专项（201203006）；国家科技支撑计划（2012BAC01B02）资助

Abstract

Abstract:

To find out the effect of grazing on plant individual traits in typical steppe, a field experiment was conducted in the experimental station of grassland ecosystem in Zhangjiakou. The land grazed for five years consecutively was sampled. Plant height, aboveground biomass, belowground biomass, root water content and the ratio of root to shoot were measured for analyzing the responses of Leymus chinensis individual traits to different grazing patterns. The results showed that grazing induced the changes of individual traits in the typical grassland of Inner Mongolia. Plant height and crown plexus picture were reduced with long-term overgrazing. Grazing changed the biomass allocation and increased the proportion of underground biomass. Aboveground had more fierce and rapid response to different grazing patterns than belowground. Root water content increased with the increase of grazing intensity. Over grazing had bigger destructiveness to the grassland in fall than in summer.

Key words: Leymus chinensis, Grazing pattern, Individual trait, Response mechanism

摘要：

为了解放牧系统中优势植物个体性状的响应机制和方式，可为草地持续利用及健康管理提供相应的科学依据。在河北沽源草地生态系统野外站以连续5年放牧的典型草原中优势植物羊草（Leymus chinensis）为研究对象，对不同放牧模式下羊草的株高、地上、地下生物量、根冠比等个体性状进行观测。结果表明：长期过度放牧导致羊草植株变矮，冠丛幅降低；放牧改变了羊草生物量分配，增加了地下生物量所占比例；羊草地上部对放牧干扰响应强烈，地下部对放牧响应较地上滞后，根系含水量有随放牧强度加大而增加的趋势。羊草个体性状对不同放牧模式有着不同的适应策略，对秋季重度放牧方式响应强烈。

关键词: 羊草, 典型草原, 放牧模式, 个体性状, 响应机制

CLC Number:

Q148.158

WEI Xiao-ting, LIU Yue-hua, ZHONG Meng-ying, WU Rui-xin, PAN Duo, SHAO Xin-qing. Responses of Leymus chinensis Individual Traits to Different Grazing Patterns[J]. Acta Agrestia Sinica, 2014, 22(5): 949-953.

位晓婷, 刘月华, 钟梦莹, 武瑞鑫, 潘多, 邵新庆. 羊草个体性状对不同放牧模式响应的研究[J]. 草地学报, 2014, 22(5): 949-953.

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Responses of Leymus chinensis Individual Traits to Different Grazing Patterns

羊草个体性状对不同放牧模式响应的研究

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