林业科学2001，Vol.37Issue(2)：13-20,8.
鄂尔多斯草地荒漠化过程与植被生物量变迁的关系
THE CORRELATION BETWEEN THE DESERTIFICATION OF GRASSLAND AND THE CHANGE OF VEGETATION BIOMASS IN ERDUOSI
程晓莉 1安树青 1陈兴龙 1李国旗 1刘世荣2
作者信息
- 1. 南京大学生命科学学院
- 2. 中国林业科学研究院森林生态环境与保护研究所
- 折叠
摘要
Abstract
The correlation between the desertification of the grassland and the change of vegetation biomass in Erduosi was reported in this paper. The results showed that, in the desertification course of the grassland, the degradation pathway of the community was both from S . bungeana community→ S . bungeana + died Artemisia ordosia community→ S . bungeana + A. ordosica community→ Stipa bungeana community→ sandland and from A. ordosica community→ A. ordosica + Cynanchum komarovii commmunity→ C. komarovii commmunity→sandland. From S. bungeana community to A. ordosica community and then to C. komarovii comnnnunity, the biomass of vegetation increased firstly and then decreased, namely from 218.1 g/m2 to 748.7 gm2 and to 155.6 g/m2. The biomass of every community varied seasonally, because of the changes of dominant species and companion species. Most of the biomass aboveground distributed near the surface layer, 76.9%～86.3% of the biomass in 0～20 cm. Meanwhile, the biomass decreased gradually with the increasing of height, 10.8%～16.7% of the biomass in the 20～30 cm layer, 2.2%～7.5% in 30～40 cm layer, 0.6%～2.9% above 40 cm. The underground, 85.5%～100% of the biomass in 0～20 cm, 9.7%～12.0% in 20～40 cm, 0～2.5% in under 40 cm. In the course of biomass accumulation, S. bungeana community and S. bungeana + died A. ordosia community decreased firstly and then increased, the accumulation ratio is from -0.29 to 0.42 and from -0.47 to 0.74, respectively. S. bungeana + A. ordosica community and S. bungeana community decreased steadily, the accumulation ratio is from - 0.04 to - 0.40 and - 0. 23, respectively. But A. ordosica + C. komarovii commmunity and C. komarovii commmunity increased steadily, the accumulation ratio is, respectively, from 0.14 to 0.29 and from 0.52 to 0.04.关键词
荒漠化/生物量/垂直分布/累积率分类
农业科技引用本文复制引用
程晓莉,安树青,陈兴龙,李国旗,刘世荣..鄂尔多斯草地荒漠化过程与植被生物量变迁的关系[J].林业科学,2001,37(2):13-20,8.
