桂林喀斯特生境红背山麻杆克隆繁殖特征  

Characteristics of Clonal Reproduction of Alchornea trewioides in Karst Region of Guilin,China

作　　者：周俊妞 梅军林 马姜明[1,2,3] 张雅君[3] 王海苗 菅瑞 ZHOU Junniu;MEI Junlin;MA Jiangming;ZHANG Yajun;WANG Haimiao;JIAN Rui(Institute of Sustainable Development and Innovation,Guangxi Normal University,Guilin Guangxi 541006,China;Key Laboratory of Rare and Endangered Animal and Plant Ecology and Environmental Protection(Guangxi Normal University),Ministry of Education,Guilin Guangxi 541006,China;College of Life Science,Guangxi Normal University,Guilin Guangxi 541006,China)

机构地区：[1]广西师范大学可持续发展创新研究院,广西桂林541006 [2]珍稀濒危动植物生态与环境保护教育部重点实验室(广西师范大学),广西桂林541006 [3]广西师范大学生命科学学院,广西桂林541006

出　　处：《广西师范大学学报（自然科学版）》2020年第3期110-116,共7页Journal of Guangxi Normal University:Natural Science Edition

基　　金：国家自然科学基金(31660197);桂林市科学研究与技术开发计划(20190205,20180107-3);广西研究生教育创新计划(XYCSZ2019081)。

摘　　要：通过研究桂林喀斯特生境砍伐干扰克隆繁殖(FICP,felling interferes clonal production)和无干扰克隆繁殖(NICP,non-interfering clonal production)2种类型的红背山麻杆Alchornea trewioides繁殖群落,利用多元统计方法分析红背山麻杆前后端水平侧根直径、分株数和地径,探讨红背山麻杆对适应喀斯特生境所表现出来的克隆繁殖特征,旨在为喀斯特石山地区的植被恢复建设提供理论依据。结果表明:(1)红背山麻杆根分枝强度较弱,方向性较强,分株不密集,表现为“游击型”克隆植物。(2)砍伐干扰对红背山麻杆的克隆繁殖具有促进作用。(3)砍伐干扰克隆繁殖的克隆分株存活率比无干扰克隆繁殖的低,风险分摊现象比无干扰明显。(4)红背山麻杆前后端水平侧根具有不对称性:在克隆分株地径小于0.2 cm时,后端水平侧根小于前端水平侧根越过临界点0.2 cm后,后端水平侧根大于前端水平侧根。In this research,two community types of felling interferes clonal production(FICP)and non-interfering clonal production(NICP)in Alchornea trewioides were studied in the karst habitat of Guilin.The multivariate statistical method was used to analyze ground diameter,numbers of ramets and basal diameter of the front part and the rear part,to discuss the clonal characteristics of A.trewioides for adaption to karst habitat,in order to provide guidance for vegetation restoration in the karst areas.The results showed that(1)the roots of A.trewioide were weak in branching,and strong directions.The ramets were not dense,showing as"guerrilla"clone plants.(2)FICP promoted clonal reproduction of A.trewioide.(3)The ramets’survival rate of FICP was lower than that of NICP,indicating more obvious risk allocation in FICP than NICP.(4)There was an asymmetry between lateral roots of the front and rear parts:The lateral root of the rear part was smaller than the front one,when the ground diameter was less than 0.2 cm.However,when the ground diameter was more than 0.2 cm,the lateral root of the rear part was larger than the front one.

关 键 词：红背山麻杆 分株 克隆繁殖 桂林喀斯特生境 

分 类 号：Q944.3[生物学—植物学]