放牧对内蒙古草地植物群落特征影响的meta分析
Meta-analysis of effects of grazing on plant community properties in Nei Mongol grassland
李娜 1唐士明 2郭建英 3田茹 1王姗 1胡冰 1罗永红 1徐柱文4
作者信息
- 1. 内蒙古大学生态与环境学院,蒙古高原生态学与资源利用教育部重点实验室,内蒙古草地生态学重点实验室,呼和浩特 010020
- 2. 农业农村部饲草高效生产模式创新重点实验室,中国农业科学院草原研究所,呼和浩特 010021
- 3. 内蒙古阴山北麓草原生态水文国家野外科学观测研究站,中国水利水电科学研究院,北京 100038
- 4. 内蒙古大学生态与环境学院,蒙古高原生态学与资源利用教育部重点实验室,内蒙古草地生态学重点实验室,呼和浩特 010020;黄河流域内蒙古段水资源与水环境综合治理自治区协同创新中心,呼和浩特 010018
- 折叠
摘要
放牧是内蒙古草原的主要利用方式,对草地植物群落具有重要影响,然而内蒙古草原植物群落特征对放牧的综合响应模式仍不清楚.基于76项研究数据,本研究对不同放牧强度、不同草地类型和不同放牧年限下,内蒙古草地植物群落特征和土壤理化性质进行meta分析,以期综合评价内蒙古草地对放牧的响应模式.结果表明:放牧显著降低了植物地上/地下生物量、盖度、高度、密度、物种丰富度、Shannon-Wiener多样性指数、Pielou均匀度指数、Simpson多样性指数和土壤含水量,且负效应随放牧强度和放牧时间的增加而增强.放牧对植被稀少、环境承载力低的草地(如荒漠草原、沙地等)具有更大的负效应.该研究表明内蒙古草地植物群落特征对放牧的响应受多个因素调控,应根据不同类型的草地制定适宜的放牧强度和放牧时间以实现草地的可持续利用.当前的放牧研究中放牧强度标准不统一,使不同研究之间难以比较,有些研究缺乏实验重复,研究结果不具有统计学意义.探索放牧强度的统一量化标准将是今后放牧研究中重要且具有挑战性的问题,同时实验设计的合理性也应受到重视.
Abstract
Aims Grazing,one of the primary ways of grassland utilization in Nei Mongol,has essential influences on plant community properties of grasslands.However,the comprehensive response patterns of Nei Mongol grassland plant community properties to grazing remain unclear.Methods Based on a dataset derived from 76 studies,the plant community characteristics and soil physicochemical properties of Nei Mongol grasslands under different grazing intensities,different grassland types and different grazing years were integrated and analyzed in order to comprehensively evaluate the response patterns of Nei Mongol grasslands to grazing.Important findings Our results showed that grazing significantly reduced plant above/below ground biomass,cover,height,density,species richness,Shannon-Wiener diversity index,Pielou evenness index,Simpson diversity index,and soil water content.The negative effects of grazing were strengthened with increasing of grazing intensity and duration.Moreover,grazing had a greater negative effect on the grasslands with sparse vegetation and low environmental carrying capacity(e.g.,desert grasslands,sandy areas,etc.).This study shows that the responses of plant community characteristics to grazing in Nei Mongol grasslands are regulated by multiple factors,and appropriate grazing intensity and grazing time should be set according to different types of grasslands to achieve sustainable utilization of grasslands.The standards of grazing intensity in current grazing studies are not uniform,making it difficult to compare different studies,and the results from some studies do not have statistical significance due to a lack of replications in the experiment.The exploration of uniform quantitative standards for grazing intensity will be an important and challenging issue in future grazing studies,and the rationality of experimental design should also be emphasized.
关键词
放牧/内蒙古草原/生物量/物种多样性/土壤特征/meta分析Key words
grazing/Nei Mongol grassland/biomass/species diversity/soil property/meta-analysis引用本文复制引用
基金项目
内蒙古自治区科技重大专项(2020ZD0009)
内蒙古自治区科技重大专项(2021ZD0008)
内蒙古自然科学基金(2019JQ04)
内蒙古自然科学基金(2021MS03081)
内蒙古自治区科技成果转化专项(2021CG0020)
出版年
2023
NETL
NSTL
维普
万方数据