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	Temporal and spatial variability of soil organic matter and total nitrogen in an agricultural ecosystem as affected by farming practices
	Huang, Biao; Sun, Weixia; Zhao, Yongcun; Zhu, Jing; Yang, Rongqing; Zou, Zhong; Ding, Feng; Su, Jianping
刊名	GEODERMA
	2007-05-15
卷号	139期号:3-4页码:336-345
关键词	agricultural ecosystem farming practices soil organic matter and total nitrogen temporal-spatial variability
ISSN号	0016-7061
DOI	10.1016/j.geoderma.2007.02.012
通讯作者	Huang, Biao(bhuang@issas.ac.cn)
英文摘要	In agricultural ecosystem, soil organic matter (SOM) and soil total nitrogen (STN) are important indexes in estimating the soil carbon stock, soil fertility and soil quality. This paper examines the temporal and spatial variation of SOM and STN in Rugao city, Jiangsu Province, an agricultural area in Yangtze River Delta region, China, as affected by farming practices using the data from 1982 through 1997 to 2002. Spatially, loamy Stagnic Anthrosols (Baipu) in the eastern area and clay Aquic Cambosols (Changqingsha) in the southern area had high contents of SOM and STN, whereas sandy Ustic Cambosols (Guoyuan) and Aquic Cambosols (Motou) in the mid-western areas had low SOM and STN contents, and loamy Aquic Cambosols (Banjing, Dongchen, etc.) in the northern or southern areas had medium SOM and STN contents. Temporally, SOM had shown a tendency to constantly increase in the past 20 years. During the period 1982-1997, the SOM and STN in the mid-western areas rapidly increased due to the effect of farming practices such as incorporating crop residues in soils and shifting from com-wheat rotation to rice-wheat rotation. From 1997 to 2002, the soils in the eastern and southern areas had a rapid increase in SOM owing to the adjustment of agricultural and cropping structures and/or application of more organic fertilizers, whereas those in the mid-western areas increased slowly or even decreased because of reduced incorporation of crop residues in soils. Accordingly, STN content in the eastern and southern areas increased slightly, but soil STN content in the mid-western areas did not change or decreased in some areas. In conclusion, the incorporation of crop residues in soils and the application of organic fertilizers were effective in increasing SOM, whereas the application of organic fertilizers in combining with chemical fertilizers were effective for accumulating STN. As regards to the implementation of these sustainable measures under rapid economic development, the government must be liable for guiding or supporting farmers so that the sparse soil resources in the densely populated area can be appropriately utilized. (c) 2007 Elsevier B.V. All rights reserved.
收录类别	SCI
WOS关键词	LONG-TERM ; BIOLOGICAL-PROPERTIES ; RESIDUE MANAGEMENT ; SUBTROPICAL CHINA ; CROPPING SYSTEMS ; LAND-USE ; CARBON ; QUALITY ; YIELD ; WHEAT
WOS研究方向	Agriculture
WOS类目	Soil Science
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000246854300009
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2558677
专题	南京土壤研究所
通讯作者	Huang, Biao
作者单位	1.Chinese Acad Sci, State Key Lab Soil & Sustainable Agr, Inst Soil Sci, Nanjing 210008, Peoples R China 2.Soil & Fertilizer Technol Extens Ctr Rugao Cty, Jiangsu 226500, Peoples R China
推荐引用方式 GB/T 7714	Huang, Biao,Sun, Weixia,Zhao, Yongcun,et al. Temporal and spatial variability of soil organic matter and total nitrogen in an agricultural ecosystem as affected by farming practices[J]. GEODERMA,2007,139(3-4):336-345.
APA	Huang, Biao.,Sun, Weixia.,Zhao, Yongcun.,Zhu, Jing.,Yang, Rongqing.,...&Su, Jianping.(2007).Temporal and spatial variability of soil organic matter and total nitrogen in an agricultural ecosystem as affected by farming practices.GEODERMA,139(3-4),336-345.
MLA	Huang, Biao,et al."Temporal and spatial variability of soil organic matter and total nitrogen in an agricultural ecosystem as affected by farming practices".GEODERMA 139.3-4(2007):336-345.

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