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	Changes in soil C and N contents and mineralization across a cultivation chronosequence of paddy fields in subtropical China
	Li, ZP; Zhang, TL; Han, FX; Felix-Henningsen, P
刊名	PEDOSPHERE
	2005-10-01
卷号	15期号:5页码:554-562
关键词	cultivation chronosequence mineralization paddy fields soil C soil N
ISSN号	1002-0160
通讯作者	Li, ZP(zhpli@issas.ac.cn)
英文摘要	Dynamics of soil organic matter in a cultivation chronosequence of paddy fields were studied in subtropical China. Mineralization of soil organic matter was determined by measuring CO2 evolution from soil during 20 days of laboratory incubation. In the first 30 years of cultivation, soil organic C and N contents increased rapidly. After 30 years, 0-10 cm soil contained 19.6 g kg(-1) organic C and 1.62 g kg(-1) total N, with the corresponding values of 18.1 g kg(-1) and 1.50 g kg(-1) for 10-20 cm, and then remained stable even after 80 years of rice cultivation. During 20 days incubation the mineralization rates of organic C and N in surface soil (0-10 cm) ranged from 2.2% to 3.3% and from 2.8% to 6.7%, respectively, of organic C and total N contents. Biologically active C size generally increased with increasing soil organic C and N contents. Soil dissolved organic C decreased after cultivation of wasteland to 10 years paddy field and then increased. Soil microbial biomass C increased with number of years under cultivation, while soil microbial biomass N increased during the first 30 years of cultivation and then stabilized. After 30 years of cultivation surface soil (0-10 cm) contained 332.8 mg kg(-1) of microbial biomass C and 23.85 mg kg(-1) of microbial biomass N, which were 111% and 47% higher than those in soil cultivated for 3 years. It was suggested that surface soil with 30 years of rice cultivation in subtropical China would have attained a steady state of organic C content, being about 19 g kg(-1).
收录类别	SCI
WOS关键词	RESIDUE MANAGEMENT REGIMES ; HOOP PINE PLANTATIONS ; ORGANIC-MATTER ; MICROBIAL BIOMASS ; N-15-LABELED NITRATE ; NITROGEN-FERTILIZER ; SEMIARID TROPICS ; PLANT RESIDUES ; GLOBAL CHANGE ; CARBON POOLS
WOS研究方向	Agriculture
WOS类目	Soil Science
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000232590800002
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2558461
专题	南京土壤研究所
通讯作者	Li, ZP
作者单位	1.Chinese Acad Sci, Inst Soil Sci, Nanjing 210008, Peoples R China 2.Mississippi State Univ, Diagnost Instrumentat & Anal Lab, Starkville, MS 39759 USA 3.Univ Giessen, Inst Soil Sci & Soil Conservat, D-35392 Giessen, Germany
推荐引用方式 GB/T 7714	Li, ZP,Zhang, TL,Han, FX,et al. Changes in soil C and N contents and mineralization across a cultivation chronosequence of paddy fields in subtropical China[J]. PEDOSPHERE,2005,15(5):554-562.
APA	Li, ZP,Zhang, TL,Han, FX,&Felix-Henningsen, P.(2005).Changes in soil C and N contents and mineralization across a cultivation chronosequence of paddy fields in subtropical China.PEDOSPHERE,15(5),554-562.
MLA	Li, ZP,et al."Changes in soil C and N contents and mineralization across a cultivation chronosequence of paddy fields in subtropical China".PEDOSPHERE 15.5(2005):554-562.

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