干旱区生态环境知识资源中心(Arid): 三工河流域梭梭群落细根生长动态及周转

Arid

	三工河流域梭梭群落细根生长动态及周转
其他题名	Growth Dynamic and Turnover of Fine Root of Haloxylon ammodendron Communities in Sangong River Basin
	王永吉 1; 赵学春 1; 来利明 1; 朱林海 1; 王健健 1; 周继华 1; 姜联合 1; 马远见 2; 赵春强 2; 郑元润 1
来源期刊	生态与农村环境学报
ISSN	1673-4831
出版年	2013
卷号	29 期号:5 页码:666-670
中文摘要	细根对植物群落功能的发挥和土壤碳库及全球碳循环具有重要意义.采用土柱法和分解袋法,于2010年5-10月整个生长季内,对三工河流域梭梭(Haloxylon ammodendron)群落的细根生物量以及分解和周转规律进行研究.结果表明,梭梭群落细根生物量呈现明显的季节变化,5-8月逐渐增加,8月达到最大,9-10月逐渐下降.细根生物量月平均值为183.76 g·m~(-2).活细根和死细根生物量分别占细根总生物量的72.59%和27.41%.梭梭群落细根生物量表现出明显的垂直变化,随土壤深度的增加而呈现先增加后逐渐降低的趋势,其中51.36%的活细根和51.81%的死细根生物量分布在>10~30 cm土层.梭梭群落细根年分解率为58.76%,达到50%和95%分解率所需时间为279和1 302 d.梭梭群落细根净生产力为110.73 g·m~(-2)·a~(-1),年周转速率为1.25次.
英文摘要	Fine root plays a significant role in plant community performance of functions, soil carbon pool and global carbon recycling. Observation was done of biomass, decomposition and turnover of the fine roots of Haloxylon ammodendron communities in the Sanjiang River Valley throughout the whole growing season from May to October in 2010, using soil column method and litter bag method. Results show that fine root biomass of the H. ammodendron communities varied significantly with seasons. It increased gradually in the period from May to August, peaked in August, and then declined gradually in September and October, and its monthly average reached 183.76 g·m~(-2), of which live fine root accounted for 72.59% and dead one for 27.41%. And its distribution varied with soil depth, showing a trend of increasing first and then declining, with a major portion distributed in >10-30 cm soil layer, accounting for 51.36% of the live fine root and 51.81% of the dead one. The annual decomposition rate of the fine root was 58.76%. It took 279 and 1 302 days for the decomposition rate to reach 50% and 95%, respectively. The net productivity of the fine root was 110.73 g·m~(-2)·a~(-1), and its annual turnover rate was 1.25 times·a~(-1). In conclusion, the fine root production of H. ammodendron communities varied significantly with season and soil depth. These findings suggest that the fine roots of H. ammodendron communities are of great significance for underground carbon recycling in the arid area.
中文关键词	梭梭 ; 细根周转 ; 生物量 ; 土壤有机碳
英文关键词	Haloxylon ammodendron fine root turnover biomass soil organic carbon
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:5022914
来源机构	中国科学院植物研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/230096
作者单位	1.中国科学院植物研究所, 北京 100093, 中国; 2.青城山-都江堰旅游景区管理局, 都江堰, 四川 611843, 中国
推荐引用方式 GB/T 7714	王永吉,赵学春,来利明,等. 三工河流域梭梭群落细根生长动态及周转[J]. 中国科学院植物研究所,2013,29(5):666-670.
APA	王永吉.,赵学春.,来利明.,朱林海.,王健健.,...&郑元润.(2013).三工河流域梭梭群落细根生长动态及周转.生态与农村环境学报,29(5),666-670.
MLA	王永吉,et al."三工河流域梭梭群落细根生长动态及周转".生态与农村环境学报 29.5(2013):666-670.