Stability of soil organic carbon changes in successive rotations of Chinese fir (Cunninghamia lanceolata (Lamb.) Hook) plantations

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	Stability of soil organic carbon changes in successive rotations of Chinese fir (Cunninghamia lanceolata (Lamb.) Hook) plantations
	Mang, J ; Wang, SL ; Feng, ZW ; Wang, QK
刊名	JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA
	2009
卷号	21 期号:3 页码:352-359
关键词	Chinese fir plantation forest soils organic carbon microbial property biochemical quality density fractionation
ISSN号	1001-0742
通讯作者	Feng, ZW, Chinese Acad Sci, Inst Appl Ecol, Huitong Expt Stn Forest Ecol, Shenyang 110016, Peoples R China
中文摘要	The importance of soil organic carbon (SOC) under forests in the global carbon cycle depends on the stability of the soil carbon and its availability to soil microbial biomass. We investigated the effects of successive rotations of Chinese fir (Cunninghamia lanceolata (Lamb.) Hook) plantations on the stability of SOC and its availability to microbes by adopting the two-step hydrolysis with H2SO4 and density fractionation. The results showed that successive rotations of Chinese fir decreased the quantity of total SOC, recalcitrant fraction, and carbohydrates in Labile Pool I (LP I), and microbial properties evidently, especially at 0-10 cm horizon. However, cellulose included in Labile Pool II (LPII) and the cellulose/total carbohydrates ratio increased in successive rotations of Chinese fir. The non-cellulose of carbohydrates included in LP I maybe highly available to soil microbial biomass. Hence the availability of SOC to microbial biomass declined over the successive rotations. Although there was no significant change in recalcitrance of SOC over the successive rotations of Chinese fir, the percentage of heavy fraction to total SOC increased, suggesting that the degree of physical protection for SOC increased and SOC became more stable over the successive rotations. The degradation of SOC quality in successive rotation soils may be attributed to worse environmental conditions resulted from disturbance that related to "slash and bum" site preparation. Being highly correlated with soil microbial properties, the cellulose/total carbohydrates ratio as an effective indicator of changes in availability of SOC to microbial biomass brought by management practices in forest soils.
学科主题	Environmental Sciences
收录类别	SCI
资助信息	National Natural Science Foundation of China [30470303]; Chinese Academy of Sciences [KZCX2-YW-405]
语种	英语
WOS记录号	WOS:000264381900014
公开日期	2011-09-23
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/54209]
专题	沈阳应用生态研究所_沈阳应用生态研究所_期刊论文
推荐引用方式 GB/T 7714	Mang, J,Wang, SL,Feng, ZW,et al. Stability of soil organic carbon changes in successive rotations of Chinese fir (Cunninghamia lanceolata (Lamb.) Hook) plantations[J]. JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,2009,21(3):352-359.
APA	Mang, J,Wang, SL,Feng, ZW,&Wang, QK.(2009).Stability of soil organic carbon changes in successive rotations of Chinese fir (Cunninghamia lanceolata (Lamb.) Hook) plantations.JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,21(3),352-359.
MLA	Mang, J,et al."Stability of soil organic carbon changes in successive rotations of Chinese fir (Cunninghamia lanceolata (Lamb.) Hook) plantations".JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA 21.3(2009):352-359.