干旱区生态环境知识资源中心(Arid): 向海沼泽湿地土壤氮素的空间分布格局

Arid

	向海沼泽湿地土壤氮素的空间分布格局
其他题名	Spatial distribution pattern of nitrogen in marsh soils in Xianghai wetlands
	白军红 1; 欧阳华 1; 邓伟 2; 周才平 1; 王庆改 3
来源期刊	地理研究
ISSN	1000-0585
出版年	2004
卷号	23 期号:5 页码:614-622
中文摘要	本文运用地统计学方法探讨了吉林省通榆县向海沼泽湿地土壤氮素在植物生长初期的空间分布格局,结果表明除铵态氮外,其他各形态氮素主要集中分布在表层土壤,呈现出由表层向下逐渐减少的趋势.各形态氮素和全氮都具有高度的变异特征,其中表层土壤碱解氮的变异最大,铵态氮最小,变异系数分别为65.64%和49.51%;其他各层土壤有机氮、全氮和硝态氮含量的统计变异较大,而碱解氮和铵态氮较小;有机氮和全氮的空间分布格局具有显著的相似性;表层土壤全氮、有机氮和碱解氮的高值区和低值区具有高度的一致性;除碱解氮主要集中在土壤表层外,其他形态氮素和全氮在土壤较深层次均出现累积峰.
英文摘要	Wetlands serve as source, sink or transfer of nitrogen(N), and spatial distribu-tion of N in wetlands also significantly influences most ecological processes of wetlands. Some researchers have testified that soil nutrients in wetlands had higher spatial heteroge- neity. Geostatistics have been successfully used in soil science and become an efficient tool to research spatial heterogeneity of soils since the 1970s. Xianghai wetland is a one of in-ternational importance, which is located at the downstream of Huolin river catchment of semi-arid area and is a typical agriculture/pastoral ecotone and ecological fragibility zone in the west of Jilin province. Xianghai wetland has been the important factor keeping ecologi-cal balance and one of the natural barriers for eastern ecological environment in this re-gion. At present? Xianghai wetlands are potentially threatened as a result of such human activities as overgrazing, building large-scale irrigation works and unreasonable reclama-tion. Spatial distribution pattern of total N and N forms in marsh soils during plant bud-ding were studied using geostatistics of Xianghai wetlands in May, 2001. The results showed that, with the exception of ammonium N, other forms of N and total N were mainly distributed on surface soils, appearing a decreasing tendency gradually with the in-crease of soil depth i the total N and all forms of N contents had higher statistical varia-tions; on surface soils, the statistical variation of the available N was the highest, but am-monium N the lowest, with variation coefficients of 65. 64Kand 49. 51%, respectively. For other soil layers, soil organic N, total N and nitrate N had higher statistical varia-tions, but available N and ammonium N had lower statistical variations. The spatial distri-bution pattern of total N was similar to that of organic N; it was highly consistent in dis-tribution areas with higher or lower contents of N forms; with the except of the fact that available N concentrated on top soils, other forms of N appeared accumulation peaks in deeper layers of soil profiles. Both N behavioral processes and environmental factors con-trolled spatial distribution pattern of N, but quantifying their influences on spatial distri-bution pattern needed further studies.
中文关键词	氮索 ; 沼泽湿地 ; 变异 ; 空间分布格局
英文关键词	sinitrogen marsh wetland variation spatial distribution pattern
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:1609796
来源机构	中国科学院地理科学与资源研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/204898
作者单位	1.中国科学院地理科学与资源研究所, 北京 100101, 中国; 2.中国科学院东北地理与农业生态研究所, 长春, 吉林 130012, 中国; 3.中国环境科学研究院, 北京 100012, 中国
推荐引用方式 GB/T 7714	白军红,欧阳华,邓伟,等. 向海沼泽湿地土壤氮素的空间分布格局[J]. 中国科学院地理科学与资源研究所,2004,23(5):614-622.
APA	白军红,欧阳华,邓伟,周才平,&王庆改.(2004).向海沼泽湿地土壤氮素的空间分布格局.地理研究,23(5),614-622.
MLA	白军红,et al."向海沼泽湿地土壤氮素的空间分布格局".地理研究 23.5(2004):614-622.