干旱区生态环境知识资源中心(Arid): 封育措施下荒漠草原针茅植物-土壤C、N、P化学计量特征

Arid

	封育措施下荒漠草原针茅植物-土壤C、N、P化学计量特征
其他题名	C,N and P ecological stoichiometry characteristics of a Stipaspecies plant-soil system subject to grazing exclusion in a desert steppe
	万芳; 蒙仲举; 党晓宏; 王瑞东; 张慧敏
来源期刊	草业学报
ISSN	1004-5759
出版年	2020
卷号	29 期号:9 页码:49-55
中文摘要	以内蒙古希拉穆仁典型荒漠草原封育措施(完全封育、季节封育)下优势植物短花针茅及克氏针茅为研究对象,通过测定其叶片、枯落物和土壤C、N、P含量及化学计量特征,分析封育措施下两种针茅养分变化特征及养分限制因素。结果表明:1)两种针茅叶片及枯落物C、N、P含量均表现为完全封育>季节封育,土壤N含量为完全封育(2.54g·kg~(-1))<季节封育(2.75g·kg~(-1));2)两种针茅植物叶片C/N、C/P表现为季节封育>完全封育(P<0.05),说明完全封育降低了两种植物的固碳能力,土壤C/N与C/P均表现为完全封育(6.03、39.80)>季节封育(4.92、36.58)且差异显著(P<0.05);3)不同封育措施两种针茅叶片N/P>16,说明封育下两种针茅植物在研究区内主要受P的限制。研究结果进一步为荒漠草原可持续恢复管理提供科学指导。
英文摘要	This research was conducted at Xilamuren in Inner Mongolia on typical desert steppe grassland dominated by Stipa breviflora and Stipa krylovii with the objective of defining the C,N,and P stoichiometry of leaves,litter and soil under two management regimes(year-round grazing exclusion and seasonal grazing exclusion).It was found that:1)The content of C,N and P in the leaves and litter in year-round exclusion were all greater than in the seasonal exclusion,while the content of soil N in year-round exclusion(2.54g·kg~(-1))was less than that in the seasonal exclusion(2.75g·kg~(-1)).2)The C∶N and C∶P ratios of the leaves in seasonal exclusion was greater than that in the year-round exclusion,which showed that the carbon sequestration ability of the two grasses was reduced under year-round exclusion.However,the soil C∶N and C∶P ratios in seasonal exclusion(4.92and 36.58,respectively)were less(P<0.05)than those in year-round exclusion(6.03and 39.80,respectively).3)The N∶P ratio of leaves were typically greater than 16.Therefore,this is an obvious indication that the two grasses studied were mainly restricted by lack of P at the study site.These results provide scientific data assist decisions on the sustainable recovery management of the desert grassland.
中文关键词	叶片 ; 枯落物 ; 土壤 ; 生态化学计量 ; 希拉穆仁荒漠草原
英文关键词	leanes litter soil ecological stoichiometry Xilamuren desert steppe
类型	Article
语种	中文
收录类别	CSCD
WOS研究方向	Agriculture
CSCD记录号	CSCD:6806659
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/2XILL650/336910
作者单位	万芳, 内蒙古农业大学沙漠治理学院, 呼和浩特, 内蒙古 010018, 中国.; 王瑞东, 内蒙古农业大学沙漠治理学院, 呼和浩特, 内蒙古 010018, 中国.; 张慧敏, 内蒙古农业大学沙漠治理学院, 呼和浩特, 内蒙古 010018, 中国.; 蒙仲举, 内蒙古农业大学沙漠治理学院;;中央与地方共建风沙物理重点实验室, ;;, 呼和浩特;;呼和浩特, 内蒙古;;内蒙古 010018;;010018, 中国.; 党晓宏, 内蒙古农业大学沙漠治理学院;;内蒙古杭锦荒漠生态系统国家定位观测研究站, ;;内蒙古杭锦荒漠生态系统国家定位观测研究站, 呼和浩特;;鄂尔多斯, 内蒙古;;内蒙古 010018;;017400, 中国.
推荐引用方式 GB/T 7714	万芳,蒙仲举,党晓宏,等. 封育措施下荒漠草原针茅植物-土壤C、N、P化学计量特征[J]. 内蒙古农业大学,2020,29(9):49-55.
APA	万芳,蒙仲举,党晓宏,王瑞东,&张慧敏.(2020).封育措施下荒漠草原针茅植物-土壤C、N、P化学计量特征.草业学报,29(9),49-55.
MLA	万芳,et al."封育措施下荒漠草原针茅植物-土壤C、N、P化学计量特征".草业学报 29.9(2020):49-55.