岷江上游干旱河谷灌丛生物量与坡向及海拔梯度相关性研究  

Research on the Correlations of Shrub Biomass with Slope-aspect and Altitude in Dry Valley of the Upper Reach of the Minjiang River

作　　者：陈泓[1] 黎燕琼[2] 郑绍伟[2] 慕长龙[2] 刘军[1] 

机构地区：[1]四川农业大学,四川雅安625014 [2]四川省林业科学研究院,四川成都610081

出　　处：《成都大学学报（自然科学版）》2007年第1期14-18,共5页Journal of Chengdu University（Natural Science Edition）

基　　金：国家"十五"科技攻关资助项目(2001BA510B03)

摘　　要：在野外线路踏查的基础上,综合选择具有代表性和人畜干扰少的岷江上游干旱河谷灌丛,采用直接收获法对岷江上游干旱河谷灌丛生物量及其随海拔梯度的分布规律和影响因素进行了研究.结果表明∶①阴、阳坡灌丛的平均总生物量分别为30 151.72 kg.hm-21、4 865.07 kg.hm-2.②阴、阳坡相对应的三个海拔梯度上,阴坡灌丛生物量、各层生物量及各器官生物量均大于阳坡.③阴坡和阳坡灌丛生物量、各层生物量及各器官生物量均表现为随海拔梯度升高而增加的趋势.According to the whole investigation along the line, shrubs of dry valley in the upper reach of the Minjiang River, which were representative and little interferential for people and poultry, were selected synthetically. The distribution regulation of shrub biomass with different altitude in this region was investigated by directly harvesting. Some conclusions obtained are as follows. ①In north facing slop, the average shrub total biomass was 30 151.72 kg· hm^-2, in south facing slop, the average shrub total biomass was 14 865.07 kg · hm^-2 .②In the corresponding 3 altitude gradients, the shrub biomass of north facing slop was far more than south facing slop, moreover biomasses of each layers were the same regular change. ③The tendency, which the shrub biomass increases along with altitude increasing, was situated both in north facing slop and south facing slop.

关 键 词：干旱河谷灌丛 生物量 海拔梯度 分布规律 岷江上游 

分 类 号：S718.54[农业科学—林学]