典型草原不同放牧强度下羊草种群空间分布的研究  

Spatial distribution of the Leymus chinensis population under different grazing intensities in a typical steppe area

作　　者：吴金蕊 李梦真 杨勇 刘爱军 王普昶 哈斯巴根[1,4] 吕世杰 运向军[1,4] WU Jin-rui;LI Meng-zhen;YANG Yong;LIU Ai-jun;WANG Pu-chang;Hasibagen;LYU Shi-jie;YUN Xiang-jun(Grassland Research Institute,Chinese Academy of Agriculture Sciences,Hohhot 010010,China;Graduate School of Chinese Academy of Agricultural Sciences,Beijing 100081,China;Inner Mongolia Forestry Monitoring and Planning Institute,Hohhot 010020,China;Key Laboratory of Grassland Remote Sensing and Emergency Technical Reserve in Inner Mongolia Autonomous Region,Hohhot 010051,China;School of Life Science,Guizhou Normal University,Guiyang 550025,China;College of Science,Inner Mongolia Agricultural University,Hohhot 010018,China)

机构地区：[1]中国农业科学院草原研究所,内蒙古呼和浩特010010 [2]中国农业科学院研究生院,北京100081 [3]内蒙古自治区林业和草原监测规划院,内蒙古呼和浩特010020 [4]内蒙古自治区草原遥感及应急技术储备重点实验室,内蒙古呼和浩特010051 [5]贵州师范大学生命科学学院,贵州贵阳550025 [6]内蒙古农业大学理学院,内蒙古呼和浩特010018

出　　处：《草业学报》2023年第12期68-76,共9页Acta Prataculturae Sinica

基　　金：内蒙古自治区自然科学基金(2023MS03012);国家重点研发计划专题项目(2021YFD1300501-04);中国农业科学院农业科技创新工程项目(CAAS-ASTIP-2020-IGR-04);内蒙古自治区自然科学基金(2021MS03020);科技部国家国际科技合作专项(2013DFR 36760);中央级公益性科研院所基本科研业务费专项(1610332012201)资助。

摘　　要：为探讨不同放牧强度下典型草原建群种羊草的空间分布特点及规律,本研究以中国农业科学院典型草原试验站羊草植物种群为研究对象,设置对照区(CK)、轻度放牧区(LG)、中度放牧区(MG)和重度放牧区(HG)4个放牧强度,结合箱式图和多重分形等方法展开研究。结果表明:羊草植物种群在不同放牧强度下的空间分布存在多重分形特征;羊草植物种群在中度和重度放牧区空间分布呈现复杂性和不均匀性,而其在对照和轻度放牧区空间分布相对均匀化;随着放牧强度的增大,羊草种群空间分布由均匀转向聚集状态,生态位宽度较为一致,个体间的竞争强度降低。无论放牧强度如何变化,典型草原的羊草种群空间分布特征以大概率子集为主,且其在典型草原试验站放牧强度试验的群落中仍占有主导地位。The aim of this study was to explore the spatial distribution characteristics and trends in the growth of Leymus chinensis under different grazing intensities in a typical steppe area.The L.chinensis population at the Typical Steppe Experimental Station of the Chinese Academy of Agricultural Sciences was subjected to grazing at four intensities:No grazing as the control(CK),light grazing(LG),moderate grazing(MG)and heavy grazing(HG).The data were analyzed using box plot and multifractal methods.The results showed that the spatial distribution of the L.chinensis population under different grazing intensities had multifractal characteristics.The spatial distribution of the L.chinensis population was complex and non-homogenous in the MG and HG treatments,but relatively uniform in CK and the LG treatment.As the grazing intensity increased,the spatial distribution of the L.chinensis population changed from uniform to aggregated,the niche breadth remained comparatively consistent,and the competition intensity among individuals decreased.Regardless of the differences in grazing intensity,the spatial distribution characteristics of the L.chinensis population in this typical steppe area were dominated by large probability subsets,and L.chinensis still occupied a dominant position in the community.

关 键 词：放牧强度 羊草 空间分布 多重分形分析 

分 类 号：S543.9[农业科学—作物学]