放牧强度对优势种群与植物群落地上现存量关系的影响  

The Influence of Grazing Intensity on the Relationship between the Standing Crops of Dominant Populations and Plant Community

作　　者：王梓晗 吕世杰[1] 王忠武[1] 刘红梅[2] 闫宝龙 王颖杰 韩国栋[1] 李治国[1] WANG Zi-han;LYU Shi-jie;WANG Zhong-wu;LIU Hong-mei;YAN Bao-long;WANG Ying-jie;HAN Guo-dong;LI Zhi-guo(Inner Mongolia Agricultural University,Hohhot,Inner mongolia 010018,China;Inner Mongolia Academy of Forestry Science,Hohhot,Inner Mongolia 010010,China;Agricultural College,Inner Mongolia University for Nationalities,Tongliao,Inner Mongolia 028000,China;The Development Center of Forest and Steppe Protection,Chifeng,Inner Mongolia 024000,China)

机构地区：[1]内蒙古农业大学,内蒙古呼和浩特010018 [2]内蒙古自治区林业科学研究院,内蒙古呼和浩特010010 [3]内蒙古民族大学农学院,内蒙古通辽028000 [4]内蒙古赤峰市森林草原保护发展中心,内蒙古赤峰024000

出　　处：《草地学报》2024年第5期1440-1447,共8页Acta Agrestia Sinica

基　　金：国家自然科学基金项目(32260352);内蒙古自治区自然科学基金项目(2021MS03042);林业科研能力提升项目(104004002);内蒙古农业大学学科交叉基金项目(BR22-14-04);内蒙古重大科技专项(2021ZD0044);国家自然科学基金项目(31760143)资助。

摘　　要：为探究优势种对植物群落结构和功能的影响,本研究以内蒙古短花针茅草原为研究对象,整理不同降水年份(2014—2016年)和4个放牧试验区(对照,Control,CK;轻度放牧,Light grazing,LG;中度放牧,Moderate grazing,MG;重度放牧,Heavy grazing,HG)下优势种群和植物群落地上现存量数据,采用对比分析和数据包络(CCR模型)分析,发现伴随放牧强度和降水量的变化,不同优势种群地上现存量的响应存在差异。LG区下的短花针茅和无芒隐子草的地上现存量高于CK、MG和HG区。冷蒿的地上现存量对放牧响应的敏感性高于短花针茅和无芒隐子草。受放牧强度影响,植物群落地上现存量由短花针茅、无芒隐子草和冷蒿这三种优势种的调控转为主要以短花针茅调控。重牧和极端干旱年份导致优势种与植物群落地上现存量的双向协调作用丧失。In order to explore the influence of dominant species on plant community structure and function,in this study we took Stipa breviflora desert steppe in Inner Mongolia as the research object,and sorted out the aboveground standing crop data of four grazing experimental areas(control,CK;light grazing,LG;moderate grazing,MG;heavy grazing,HG)under different precipitation years(2014-2016),and perfomed comparative analysis and data envelopment(CCR model)analysis.The conclusions were as follows.With the change of grazing intensity and rainfall,the response of different dominant populations was different.The aboveground standing crop of S.breviflora and C.songorica in LG was higher than that in CK,MG and HG.The sensitivity of aboveground standing crop of A.frigida to grazing was higher than that of S.breviflora and C.songorica.Under the influence of grazing intensity,the aboveground standing crop of plant community changed from the regulation of three dominant species of S.breviflora,C.songorica and A.frigida to the regulation of S.breviflora.Heavy grazing and extreme drought years lead to the loss of two-way coordination between aboveground standing crop of dominant populations and plant community.

关 键 词：荒漠草原 放牧强度 降水量 CCR模型 地上现存量 

分 类 号：S812.6[农业科学—草业科学]