干旱区生态环境知识资源中心(Arid): 东祁连山高寒草地地上生物量的时空变化

Arid

	东祁连山高寒草地地上生物量的时空变化
其他题名	Spatio-temporal variation of the aboveground biomass of the alpine grassland in eastern Qilian Mountains
	王紫 1; 赵锦梅 2; 王彦辉 3; 蒋志荣 2
来源期刊	中国水土保持科学
ISSN	2096-2673
出版年	2019
卷号	17 期号:3 页码:113-120
中文摘要	高寒草地生物量受山地复杂地形影响而时空变化很大,然而研究还较少。为定量理解东祁连山地区高寒草地地上生物量的时空变化规律,为其合理保护利用和服务功能评价提供科学依据,在半干旱的甘肃天祝县抓喜秀龙乡,选择未受放牧和人为活动干扰的阴坡和阳坡的上、中、下坡位样地,以及受放牧和人为活动干扰的平地对照样地,各设4个1 m * 1 m的样方,于2016年生长季各月调查1次地上生物量。结果表明:地上生物量( g /m~2 )的坡向差异为阴坡生长季均值( 292.4)整体稍高于阳坡( 282.6),二者都远高于平地( 163.5);坡位差异为随坡位上升而降低,生长季均值( g /m~2 )阳坡为下坡( 365.76) >中坡( 268.61) >上坡( 213.30),阴坡为下坡( 323.08) >中坡( 278.61) >上坡( 275.42);时间变化为生长季初期快速生长、之后生长逐渐变缓,符合对数函数,具体生长速率随坡向、坡位、时间而异。综合来看,受坡向和坡位导致的水热条件和土层厚度等环境因子影响,高寒草地地上生物量存在明显而复杂的时空变化。
英文摘要	[Background]The spatio-temporal variation of biomass in the alpine grassland is very large due to the complex terrain. However,such studies are rare till now. The aims of this study is to quantify the variation of aboveground biomass in alpine grassland with slope aspect,slope position,and time in growing season,to provide a scientific basis for its rational protection,utilization,and ecosystem service evaluation. [Methods] This study was carried out in the representative region of eastern Qilian Mountains and at the semi-arid Zhuaxixiulong township of Tianzhu county of Gansu province. Four plots of 1 m * 1 m were set up at the down-,middle-and up-slope on a shady slope and a sunny slope without grazing and human disturbance. In addition,as a contrast experiment,4 plots of 1 m * 1 m were set up at a level ground where grazing and human disturbance existed. Within the growing season of 2016 ( June - Sept. ),the aboveground biomass were investigated monthly. [Results] The average aboveground biomass in growing season on the entire shady slope ( 292.4 g /m~2 ) was slightly higher than that on the sunny slope ( 282.6 g /m~2 ),and both were far higher than that on the level ground ( 163.5 g /m~2 ). The aboveground biomass on both sunny and shady slope decreased with rising slope position on the whole, with the growing season averages of 365.76,268.61 and 213.30 g /m~2 for the down-,middle- and upslope on sunny slope,and 323.08,278.61 and 275.42 g /m~2 on shady slope,respectively. The aboveground biomass first increased rapidly in the early growing season,and then increased with a declining and nonlinear rate,which was in accordance with the logarithmic function. The concrete growth rate varied with slope aspect,slope position and phenological time. [Conclusions]In general,affected by the differences in water and heat conditions and soil thickness induced by slope aspect and slope position,the aboveground biomass of alpine grassland shows an obvious and complex spatio-temporal variation.
中文关键词	高寒草地 ; 地上生物量 ; 时空变化 ; 东祁连山
英文关键词	alpine grassland aboveground biomass spatio-temporal variation eastern Qilian Mountains
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:6534092
来源机构	甘肃农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/239828
作者单位	1.甘肃农业大学;;中国林业科学研究院森林生态环境与保护研究所, ;;, 兰州;;, ;;北京 730070;;100091; 2.甘肃农业大学, 兰州, 甘肃 730070, 中国; 3.中国林业科学研究院森林生态环境与保护研究所, 北京 100091, 中国
推荐引用方式 GB/T 7714	王紫,赵锦梅,王彦辉,等. 东祁连山高寒草地地上生物量的时空变化[J]. 甘肃农业大学,2019,17(3):113-120.
APA	王紫,赵锦梅,王彦辉,&蒋志荣.(2019).东祁连山高寒草地地上生物量的时空变化.中国水土保持科学,17(3),113-120.
MLA	王紫,et al."东祁连山高寒草地地上生物量的时空变化".中国水土保持科学 17.3(2019):113-120.