摘要
为了探索三江源区＂黑土型＂退化草地上建植的青海草地早熟禾（Poa pratensiscv.Qinghai）栽培草地群落植被特征、物种组成、多样性指数和土壤物理性状的变化趋势,对不同生长年限的栽培草地进行了实地调查。结果表明,不同建植年限栽培草地群落盖度、植株高度、地上植物量均呈下降趋势,且不同建植年限草地之间存在显著差异（P〈0.05）,随着生长年限的延长,不同建植年限栽培草地之间物种数和Shannon-Wiener指数差异不显著（P〉0.05）,均匀度指数存在显著差异（P〈0.05）。生长9年的青海草地早熟禾土壤含水量和土壤容重均比2年草地的高,且2年和9年的草地各土壤层含水量差异不显著（P〉0.05）,9年比2年草地各土层土壤容重增加0.03~0.33 g/cm3。
A field survey was conducted on the pasture of Poa pratensis cv.Qinghai with the different growing years to find the changeable law of community characteristics and its species composition,diversity index,and soil physical properties in the source region of Three Rivers.This study showed that the community cover,plant height and aboveground biomass decreased with the increase of growing years.The richness index and Shannon-Wiener index were not significantly different,but the pielou index was different among different growing year pastures.The soil moisture and soil bulk density in the pasture with 9 years were higher than that in the pasture with 2 years,however,the soil water content was not significant between 2 year pasture and 9 year pasture（P0.05）.
出处
《草业科学》
CAS
CSCD
北大核心
2011年第6期910-914,共5页
Pratacultural Science
基金
国家科技支撑项目(2009BAC61B02)
青海省重点攻关项目(2009-N-502)
青海省软科学项目(2009-Z-602)
关键词
青海草地早熟禾
栽培草地
生长年限
植被特征
土壤物理性状
Poa pratensis cv.Qinghai
pasture
growth years
vegetation characteristic
soil physical properties
