CHANGES IN SOIL NITROGEN AVAILABILITY DUE TO STAND DEVELOPMENT AND MANAGEMENT PRACTICES ON SEMI-ARID SANDY LANDS, IN NORTHERN CHINA

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	CHANGES IN SOIL NITROGEN AVAILABILITY DUE TO STAND DEVELOPMENT AND MANAGEMENT PRACTICES ON SEMI-ARID SANDY LANDS, IN NORTHERN CHINA
	Chen, FS; Zeng, DH; Fahey, TJ; Chen, FS, 999 Xuefuda Rd, Nanchang 330031, Peoples R China
刊名	LAND DEGRADATION & DEVELOPMENT
	2009
卷号	20 期号:5 页码:481-491
关键词	Soil n Transformation Ion Exchange Resin Bag Method Pinus Sylvestris Var. Mongolica Livt. Keerqin Sandy Lands China
ISSN号	1085-3278
英文摘要	Soil nitrogen (N) availability is one of the limiting factors for plant growth on sandy lands. Little is known about impacts of afforestation on soil N availability and its components in southeastern Keerqin sandy lands, China. In this study. we measured N transformation under sandy Mongolian pine (Pinus sylvestris var. mongolica Litv.) plantations of different ages (grassland. young, middle-aged, close-to-mature) and management practices (non-grazing and free-grazing) during the growing seasons using the ion exchange resin bag method. Results showed that, for all plots and growing, season soil NH4+-N, NO3--N, mineral N, and relative nitrification index, varied from 0.18 to 1.54, 0.96 to 22.05, 1.23 to 23.58 mu g d(-1) g(-1) resin. and 0.76 to 0.97, respectively, and NO3--N dominated the available N amount due to intense nitrification in these ecosystems. In general, the four indices significantly increased in the oldest plantation, with corresponding values in non-grazing sites lower than those in free-grazing sites (p < 0.05). Our Studies indicated that it is a slow, extended process to achieve improvement in soil quality after afforestation of Mongolian pine in the study area. Copyright (C) 2009 John Wiley & Sons, Ltd.
学科主题	Environmental Sciences ; Soil Science
语种	英语
WOS记录号	WOS:000270773800002
资助机构	National Natural Science Foundation of China [30872011, 3060047]; National Key Technologies R and D Program of China [2006BAD26B0201-1]
公开日期	2011-09-23
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/54025]
专题	沈阳应用生态研究所_沈阳应用生态研究所
通讯作者	Chen, FS, 999 Xuefuda Rd, Nanchang 330031, Peoples R China
推荐引用方式 GB/T 7714	Chen, FS,Zeng, DH,Fahey, TJ,et al. CHANGES IN SOIL NITROGEN AVAILABILITY DUE TO STAND DEVELOPMENT AND MANAGEMENT PRACTICES ON SEMI-ARID SANDY LANDS, IN NORTHERN CHINA[J]. LAND DEGRADATION & DEVELOPMENT,2009,20(5):481-491.
APA	Chen, FS,Zeng, DH,Fahey, TJ,&Chen, FS, 999 Xuefuda Rd, Nanchang 330031, Peoples R China.(2009).CHANGES IN SOIL NITROGEN AVAILABILITY DUE TO STAND DEVELOPMENT AND MANAGEMENT PRACTICES ON SEMI-ARID SANDY LANDS, IN NORTHERN CHINA.LAND DEGRADATION & DEVELOPMENT,20(5),481-491.
MLA	Chen, FS,et al."CHANGES IN SOIL NITROGEN AVAILABILITY DUE TO STAND DEVELOPMENT AND MANAGEMENT PRACTICES ON SEMI-ARID SANDY LANDS, IN NORTHERN CHINA".LAND DEGRADATION & DEVELOPMENT 20.5(2009):481-491.