干旱区生态环境知识资源中心(Arid): 敦煌阳关湿地土壤有机碳分布特征及其影响因素

Arid

	敦煌阳关湿地土壤有机碳分布特征及其影响因素
其他题名	Distribution and influencing factors of soil organic carbon in Dunhuang Yangguan wetland
	张剑 1; 王利平 1; 谢建平 2; 赵庭伟 2; 曹建军 1
来源期刊	生态学杂志
ISSN	1000-4890
出版年	2017
卷号	36 期号:9 页码:2455-2464
中文摘要	湿地生态系统土壤碳储量在全球碳平衡中起着重要作用。以敦煌阳关国家级自然保护区渥洼池草本沼泽湿地为研究对象,选取53个样地,采用分层采样方法(0 ~ 20、20 ~ 40和40~60 cm)对其中高盖度、中盖度、低盖度3种植被类型的土壤有机碳含量、分布特征及其影响因素进行了研究。结果表明: (1)高盖度、中盖度、低盖度植被0 ~ 60 cm土壤的有机碳含量分别为4.94~25.89、4.77~13.89和3.56 ~ 11.42 g·kg~(-1),高盖度、中盖度植被20 ~ 40、40~60 cm的土壤有机碳含量与低盖度的差异显著(P<0.05);高盖度植被土壤有机碳的空间变异最大,低盖度植被居中,中盖度植被最小; (2)土壤有机碳含量与土壤水分、全氮、全磷和N/P均呈显著正相关(P<0.01),与土壤盐分、容重均呈显著负相关(P<0.01) 。通过多元线性回归分析,土壤水分是影响土壤有机碳积累的关键主导因素。上述研究结果可为干旱区湿地保护、管理以及生态恢复措施的制定提供科学依据。
英文摘要	Soil carbon storage of wetland ecosystems plays an important role in global carbon budget. In terms of coverage of wetland,three types of sites,including high,medium and low coverage,were sampled in Wowachi herbal marsh wetlands of National Nature Reserve of Dunhuang Yangguan. Soil samples at 0-20,20-40,40-60 cm layers were taken from 53 plots to explore the distribution of soil organic carbon (SOC) and its influence factors. The results showed that the SOC concentrations at 0-60 cm depths were 4.94-25.89,4.77-13.89,and 3.56-11.42 g·kg~(-1) at high,medium and low coverage sites,respectively. The differences in SOC at 0-20 cm and 40-60 cm depths were significant between high,medium and low coverage (P<0.05). The spatial variation of SOC was the largest in wetland with high coverage,and it was the smallest in wetland with medium coverage,while it was intermediate in wetland with low coverage. The SOC was positively correlated with soil moisture,total nitrogen,total phosphorus and N: P ratio (P<0.01),but it was negatively correlated with soil salinity and soil bulk density (P < 0.01). Soil moisture was the key factor affecting SOC accumulation. Our results can provide scientific basis for wetland protection,management and ecological restoration in this arid region.
中文关键词	敦煌阳关湿地 ; 植被盖度 ; 土壤有机碳 ; 分布特征 ; 土壤水分
英文关键词	Dunhuang Yangguan wetland vegetation cover soil organic carbon distribution characteristics soil moisture
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:6064335
来源机构	西北师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236569
作者单位	1.西北师范大学地理与环境科学学院, 兰州, 甘肃 730070, 中国; 2.甘肃敦煌阳关国家级自然保护区管理局, 敦煌, 甘肃 736200, 中国
推荐引用方式 GB/T 7714	张剑,王利平,谢建平,等. 敦煌阳关湿地土壤有机碳分布特征及其影响因素[J]. 西北师范大学,2017,36(9):2455-2464.
APA	张剑,王利平,谢建平,赵庭伟,&曹建军.(2017).敦煌阳关湿地土壤有机碳分布特征及其影响因素.生态学杂志,36(9),2455-2464.
MLA	张剑,et al."敦煌阳关湿地土壤有机碳分布特征及其影响因素".生态学杂志 36.9(2017):2455-2464.