Structure Characteristics of Herbages Under Five Types of Artificial Forest Plantations in Loess Hilly Region

HU Xiangming; CHENG Jimin; WAN Huie

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Structure Characteristics of Herbages Under Five Types of Artificial Forest Plantations in Loess Hilly Region

- Structure Characteristics of Herbages Under Five Types of Artificial Forest Plantations in Loess Hilly Region
- Bulletin of Soiland Water Conservation Vol. 25, Issue 3, Pages: 41-45(2006)
- 作者机构：
  
  1. 中国科学院水利部水土保持研究所西北农林科技大学水土保持研究所, 陕西杨凌,712100
  2. 中国科学院研究生院,北京,100039
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- Published：2006
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HU Xiangming, CHENG Jimin, WAN Huie. Structure Characteristics of Herbages Under Five Types of Artificial Forest Plantations in Loess Hilly Region[J]. Bulletin of Soiland Water Conservation, 2006, 25(3): 41-45.
DOI：

HU Xiangming, CHENG Jimin, WAN Huie. Structure Characteristics of Herbages Under Five Types of Artificial Forest Plantations in Loess Hilly Region[J]. Bulletin of Soiland Water Conservation, 2006, 25(3): 41-45. DOI：

摘要

调查分析了黄土丘陵区5种人工乔灌林小叶杨(Populus simonii)林

山杏(Prunus armeniaca)林

山桃(Prunus davidiana)林

沙棘(Hippophae reamnoides)林

柠条(Caragana korshinskii)林下草本层植物的物种组成、结构特征及其差异。结果表明:5种人工乔灌林下共有37种草本植物

各人工林林下物种组成数量在17~25之间变化

其中以杏树林最多;5种人工林下草本层平均盖度、平均高度、平均生物量存在较大差异

但多样性指数相差不显著。总体来说

黄土丘陵区人工乔灌林下草本植物物种组成较少

物种多样性指数较低

结构参数较小

说明该地区人工林林下环境条件较差

严重影响草本植物个体的生长发育和群落结构。综合分析表明

具有较低林分密度和林冠郁闭度的山杏林是恢复状况相对最好的人工林

揭示了保持合理的林分密度

同时采取疏伐、修枝等管理措施是促进人工林生长发育以及林下草本植物物种多样性和片层结构改善的关键。

Abstract

In order to understand the herbage biodiversity and synusia structure of artificial forest

we investigated herbages under five forest types of Populus simonii(PS)

Prunus armeniaca(PA)

Prunus davidiana(PD)

Hippophae reamnoides(HR) and Caragana korshinskii(CK).In the 37 herbaceous species identified

only 18

25 and 17species were present in the PS

HR and CK forests

respectively.For herbages

Stipa bungeana

Arthraxon hispidus

Potentilla multifida and Thymus mongolicus were common in the five plantations.The average coverage

height and biomass of herbages in five artificial forests were different obviously

but community biodiversity was similar.In conclusion

low biodiversity and limited structure development(coverage

height

biomass) under five artificial forests indicate that the environments under artificial plantations are very bad and affect herbage individual development and community structure.Results show that the best herbage community has developed under the Prunus armeniaca forest with a relatively open canopy and low tree density

which suggests that the measures of tree thinning and canopy pruning to keep reasonable density are crucial for promoting artificial forest development

and improving herbage biodiversity and community structure.

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