Effects of Natural Enclosing on Grassland Communities in Yunwu Mountain

ZHAO Yan-yun; HU Xiang-ming; CHENG Ji-min; WAN Hui-e

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Effects of Natural Enclosing on Grassland Communities in Yunwu Mountain

- Effects of Natural Enclosing on Grassland Communities in Yunwu Mountain
- Bulletin of Soiland Water Conservation Vol. 27, Issue 5, Pages: 95-98(2008)
- 作者机构：
  
  1. 滨州学院黄河三角洲生态环境研究中心,山东,滨州,256600
  2. 中国科学院水土保持与生态环境研究中心, 陕西杨凌,712100
- 作者简介：
- 基金信息：
- DOI：
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- Published：2008
- 稿件说明：
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ZHAO Yan-yun, HU Xiang-ming, CHENG Ji-min, et al. Effects of Natural Enclosing on Grassland Communities in Yunwu Mountain[J]. Bulletin of Soiland Water Conservation, 2008, 27(5): 95-98.
DOI：

ZHAO Yan-yun, HU Xiang-ming, CHENG Ji-min, et al. Effects of Natural Enclosing on Grassland Communities in Yunwu Mountain[J]. Bulletin of Soiland Water Conservation, 2008, 27(5): 95-98. DOI：

摘要

对云雾山封育和未封育草地土壤水分、养分、团聚体含量以及群落结构进行了对比研究。结果表明

0—20 cm为草地土壤含水量活跃层

同时封育草地和未封育草地的水分补偿深度分别为140 cm和20cm;随土层深度增加

草地中>1 mm和>0.25 mm粒径团聚体含量逐渐递减

封育草地>1 mm和>0.25mm粒径的团聚体含量均高于未封育草地;除速效P外

封育草地较未封育草地具有较高的土壤有机质、全氮、速效钾、硝态氮、铵态氮和碱解氮含量;未封育草地和封育草地群落的物种数

Simpson指数

Shannon—Wiener指数和均匀度相近

而植物的平均高度和盖度为未封育草地<封育草地。

Abstract

This article contrasted the enclosed and unenclosed grasslands for soil water

soil nutrients

water stable aggregates

and community structure.Results showed that in grasslands

soil water active layer was 0—20 cm

and meanwhile

compensatory depths were 140 cm and 20 cm in enclosed and unenclosed grasslands

respectively.Below the depths

soil water content kept the level of 9.5% and 8.5% in enclosed and unenclosed grasslands

respectively.With soil depth increased

soil water stable aggregate content(1 and 0.25 mm) was reduced gradually and in enclosed grassland

it was greater than that in unenclosed grassland.Except the available P

the contents of soil organic matter

total N

available K

available N

NO3-—N and NH+4—N in enclosed grassland were much greater than those in unenclosed grassland.The number of species

Simpson index

Shannon—Wiener index

and Pielou index in the two grasslands were similar.The average plant height and coverage in unenclosed grassland were less than those in enclosed grassland and the differences were significant.

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