干旱区生态环境知识资源中心(Arid): 祁连山北坡天然草地地下生物量及其与环境因子的关系

Arid

	祁连山北坡天然草地地下生物量及其与环境因子的关系
其他题名	Belowground biomass and its relationship to environmental factors of natural grassland on the northern slopes of the Qilian Mountains
	黄德青 1; 于兰 2; 张耀生 1; 赵新全 1
来源期刊	草业学报
ISSN	1004-5759
出版年	2011
卷号	20 期号:5 页码:1-10
中文摘要	祁连山北坡天然草地植被以高寒草原、山地草甸、山地草甸草原、山地草原和山地荒漠草原等类型为主,对这五类天然草地地下生物量及与环境因子关系的分析结果显示,五类草地的地下生物量除山地草原、山地草甸草原和高寒草原无显著差异外,其他各类草地间差异显著(P<0.05),均呈"T"形分布,且随土层深度的加深呈指数形式递减;地下生物量季节变化在高寒草原表现为"W"型变化规律,其他各类草地均呈"N"型变化规律,且随土层深度的加深依次减小;地下净生产量大小依次为山地草甸(546.84g/m_2)>山地草甸草原(410.76g/m_2)>山地草原(358.12g/m_2)>高寒草原(301.33g/m_2)>山地荒漠草原(81.68g/m_2),地下生物量的周转值均在45%以上;五类草地地下生物量与水热因子的关系为负相关关系,但均没有达到显著相关水平(P>0.05)(除山地荒漠草原外),但在水热条件较好的7-8月份,五类草地地下生物量与水热因子的相关性(正相关或负相关)均达极显著水平(P<0.01),而在其他月份,不同类型草地地下生物量对环境因子的响应存在较大差异。
英文摘要	The belowground biomass and its relationships with environmental factors of natural grassland: alpine steppe,mountain meadow,mountain meadow steppe,mountain steppe and mountain-desert grassland of the northern slopes of the Qilian mountains were investigated.1) The belowground biomasses of five kinds of grassland differed significantly(P<0.05) except for mountain steppe,mountain meadow steppe,and alpine steppe.The belowground biomass reduced with soil depth in an exponential manner and with a "T" shape distribution.2) Seasonal change of the belowground biomass was of a "W" type in alpine steppe and of a "N" type in other grasslands,and decreased with soil depth.3) Below ground net productivity of mountain meadow was the highest(546.84 g/m_2),and was followed by mountain meadow steppe(410.76 g/m_2),mountain steppe(358.12 g/m_2),alpine steppe(301.33 g/m_2) and mountain-desert grassland(81.68 g/m_2).Turnover value of the belowground biomass was beyond 45%.4) There were negative correlations between the belowground biomasses of five kinds of grassland and the hydrothermal factor,though the correlations were not significant except for mountain-desert grassland.But the correlations(positive or negative) between the belowground biomasses of five kinds of grassland and the hydrothermal factor were highly significant in the 7-8 months with better hydrothermal conditions.In other months,the correlations between the belowground biomasses of different grasslands and environmental factors was very varied.
中文关键词	天然草地 ; 地下生物量 ; 净生产量 ; 周转值 ; 环境因子
英文关键词	natural grassland belowground biomass net productivity turnover value environment factor
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:4366807
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/226226
作者单位	1.中国科学院西北高原生物研究所, 中国科学院高原生物适应与进化重点实验室, 西宁, 青海 810001, 中国; 2.桂林医学院基础医学院, 桂林, 广西 541004, 中国
推荐引用方式 GB/T 7714	黄德青,于兰,张耀生,等. 祁连山北坡天然草地地下生物量及其与环境因子的关系[J]. 中国科学院西北生态环境资源研究院,2011,20(5):1-10.
APA	黄德青,于兰,张耀生,&赵新全.(2011).祁连山北坡天然草地地下生物量及其与环境因子的关系.草业学报,20(5),1-10.
MLA	黄德青,et al."祁连山北坡天然草地地下生物量及其与环境因子的关系".草业学报 20.5(2011):1-10.