干旱区生态环境知识资源中心(Arid): 围封对内蒙古典型草原与荒漠草原植被-土壤系统碳密度的影响

Arid

	围封对内蒙古典型草原与荒漠草原植被-土壤系统碳密度的影响
其他题名	Effects of enclosure on carbon density of plant-soil system in typical steppe and desert steppe in Nei Mongol,China
	闫宝龙; 王忠武; 屈志强; 王静; 韩国栋
来源期刊	植物生态学报
ISSN	1005-264X
出版年	2018
卷号	42 期号:3 页码:327-336
中文摘要	草地生态系统是巨大的碳库,在全球碳循环中起着重要的作用。该研究以内蒙古中温带草地区典型草原和荒漠草原为研究对象,测定了两种草原类型围封与放牧后地上生物量碳密度、地下生物量碳密度和土壤碳密度,探讨围封对两种草原类型植被-土壤系统碳密度的影响。结果表明:(1)围封显著地增加了典型草原地上和地下生物量的碳密度,对荒漠草原地上生物量碳密度增加影响显著,对地下生物量碳密度增加影响不显著;(2)围封显著地增加了典型草原土壤碳密度,使荒漠草原土壤碳密度有增加的趋势,但影响不显著;(3)典型草原围封样地地下生物量和土壤碳密度的垂直分布显著高于放牧样地,而荒漠草原围封样地地下生物量和土壤碳密度的垂直分布与放牧样地的差异不显著;(4)围封分别提高了典型草原和荒漠草原植被-土壤系统碳密度的2.2倍和1.6倍,典型草原和荒漠草原分别有超过65%和89%的碳储存在土壤中,两种草原类型的地下生物量碳库均占总生物量碳库的90%以上。研究结果表明围封能够有效地增加草原生态系统的碳储量。
英文摘要	Aims As an immense carbon (C) stock,grassland ecosystem plays a crucial role in global C cycling.The objective of this research was to reveal the effects of enclosure on C density of the plant-soil system by comparing the aboveground biomass (AGB),belowground biomass (BGB) and soil C density in enclosure plots with those in grazing plots in the typical steppe (TS) and desert steppe (DS) in Nei Mongol,China.Methods At each of the 19 study sites,we set up a 100 m 100 m plot and 5 quadrats (1 m 1 m) along the diagonal transect within each plot.At each quadrat,AGB was harvested first and then a soil core (0-100 cm depth,7 cm inner diameter) was taken for BGB and soil C content measurement.Each soil core was divided into 7 depth increments (0-5 cm,5-10 cm,10-20 cm,20-30 cm,30-50 cm,50-70 cm,70-100 cm).Important findings (1) Enclosure significantly increased C density of AGB and BGB in TS.In DS,enclosure significantly increased C density of AGB,but had no significant effect on the C density of BGB.(2) Enclosure significantly increased soil C density in TS,but had no significant impact in DS although there was an increasing trend.(3) For all increments along the soil profile,enclosure significantly increased BGB and soil C density compared to grazing plots in TS,but this effect was not found in DS.(4) Enclosure increased C density of the plant-soil system by 2.2 and 1.6 times in TS and DS,respectively.65% and 89% C was stored in soil in TS and DS,respectively,and BGB C stock accounted for more than 90% of total biomass C in both TS and DS.Enclosure is an effective approach to improve C sequestration in grassland ecosystems.
中文关键词	围封 ; 典型草原 ; 荒漠草原 ; 碳密度 ; 垂直分布
英文关键词	enclosure typical steppe desert steppe carbon density vertical distribution
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:6237052
来源机构	内蒙古农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/238627
作者单位	内蒙古农业大学草原与资源环境学院, 呼和浩特, 内蒙古 010019, 中国
推荐引用方式 GB/T 7714	闫宝龙,王忠武,屈志强,等. 围封对内蒙古典型草原与荒漠草原植被-土壤系统碳密度的影响[J]. 内蒙古农业大学,2018,42(3):327-336.
APA	闫宝龙,王忠武,屈志强,王静,&韩国栋.(2018).围封对内蒙古典型草原与荒漠草原植被-土壤系统碳密度的影响.植物生态学报,42(3),327-336.
MLA	闫宝龙,et al."围封对内蒙古典型草原与荒漠草原植被-土壤系统碳密度的影响".植物生态学报 42.3(2018):327-336.