不同干扰强度对冷蒿再生生长的影响  

The Effect of Different Disturbing Indensity on Regrowth of Artemisia frigida

作　　者：刘美玲[1] 杨持[1] 

机构地区：[1]内蒙古大学生命科学学院,内蒙古呼和浩特010021

出　　处：《内蒙古大学学报（自然科学版）》2002年第4期446-451,共6页Journal of Inner Mongolia University：Natural Science Edition

基　　金：<国家重点基础研究发展规划>(G2 0 0 0 0 4870 4) ;国家自然科学基金 (3 9760 0 2 0 )

摘　　要：采用人为模拟采食试验 .试验处理为 :对照组、剪掉枝条长度 1 /4组、剪掉枝条长度 2 /4组、和剪掉枝条长度 3 /4组 .然后在这四种梯度上测量不同采食强度下冷蒿的再生生长、净增长、地上生物量、地下生物量、枝条数五个参数 .实验结果表明 :第一 ,在这四个梯度上生长状况最好的是剪掉枝条长度 1 /4组 ,剪掉枝条长度 3 /4组的冷蒿生长最差 .这二者与对照组存在显著差异 ,说明在草场利用方面适度放牧可以有效的维持草地有较高的生产力 ;第二 ,一年龄冷蒿的再生生长能力、净增长能力比多年龄冷蒿强 ;第三 ,在一定限度内冷蒿生存范围越大、可利用资源越多 。The imitated experiment of animal's grazing was adopted.The material of experiment were one year old Artemisia frigida and those of several years old.Some grew in big flowerpots and some in small ones.The several year old Artemisia frigida poting in campus was transplanted from the grassland of XiLinGuoLe Region. We divided Artemisia frigida into four groups: contrastive group,group of cutting length of branch by one fourth,group of cutting two fourthes,and group of cutting three fourthes,then,measured five parameters:total regrowth,net growth,number of branch,biomass above ground,and biomass under ground.The result indicated:〔1〕, Artemisia frigida whose branch was cut down by one fourth grew best,and the ones being cut three fourthes grew worst.They all had significant difference comparing with the ones in contrastive group.This showed that moderate grazing can keep effectivelly higher producation of grassland;〔2〕,experiment also showed that the ability of total regrowth and net growth of one year old Artemisia frigida are better than the ones of several year old Artemisia frigida ;〔3〕, under limited condition,the wider the living range of Artemisia frigida was,the more resource was,and the stronger Artemisia frigida regenerated.

关 键 词：冷蒿 再生生长 干扰强度 

分 类 号：Q948.12[生物学—植物学]