沙地油蒿群落生产力动态的能量生态学研究  

ENERGY ECOLOGICAL RESEARCH ON PRODUCTIVITY DYNAMICS OF Artemisia ordosica COMMUNITY IN SANDLAND

作　　者：李晓兵[1,2,3] 田青松 李博[1,2,3] 

机构地区：[1]北京师范大学资源科学研究所国家教委环境演变与自然灾害开放研究实验室 [2]内蒙古大学自然资源研究所 [3]中国农业科学院草原研究所

出　　处：《生态学报》1998年第3期315-315,共1页Acta Ecologica Sinica

基　　金：国家"八五"科技攻关课题

摘　　要：从鄂尔多斯高原固定沙地油蒿群落光合作用所积累的能量的动态变化研究入手，从能量生态学的角度探讨了油蒿群落生产力动态的形成机制。研究表明：群落地上生物量与能量现存量变化趋势相一致，均在９月初达全年最大值。油蒿光合强度在７、８月份较大。群落地上能量现存量增长率、群落生长速率及能量转化率均在这两个月中较高，即它们的变化趋势一致。植物光合作用积累能量的动态变化与群落生产力变化机制是密不可分的。The mechanism of dynamics of productivity of community from the angle of energy ecology was investigated.The results show that there were the same dynamics between biomass and standing energy quantity of community,and they all get the maxmium at the beginning of September.The photosynthetic strength of Artemisia ordosica was bigger in July and August than in any other months.so were the increasing rate of standing energy,growth rate of biomass and the converting rate of standing energy of aboveground community were all bigger in July and August than in any other months.This suggest that the relationship between mechanism of productivity of dynamics and of energy dynamics stimulated in photosynthesis are very closer.

关 键 词：生产力 动态 能量生态学 油蒿 沙地 

分 类 号：Q949.783.5[生物学—植物学] Q948.1