Acidification of surface soil in croplands in the semiarid middle Tibet Plateau, China

doi:10.1109/ESIAT.2009.72

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 成都山地所知识仓储（2009年以前）

	Acidification of surface soil in croplands in the semiarid middle Tibet Plateau, China
	Zhonghao Zhou 1,2; Shuhan Du 1,2; Gangcai Liu 2
	2009
会议日期	JUL 04-05, 2009
会议地点	Wuhan
关键词	soil acidification nitrogen fertilizers cropland tibetan plateau
DOI	10.1109/ESIAT.2009.72
页码	209-212
国家	PEOPLES R CHINA
英文摘要	The research of temporal variability of fertility input rates and how this variation affects soil acidity is imperative in the semiarid agricultural areas. Through the investigation of soil pH in cropland in the semiarid middle Tibet Plateau, China, in 2008 and the analogy with the spatial-temporal variation of pH of soils and their causing factors, It was shown that significant changes of soil pH in the area occurred since the Second National Soil Survey in 1980s, With average pH values decreasing from 7.70 in 1980s to 7.22 in 2008. The annual nitrogen rates were significantly different during three periods: 1985-1990, 1990-1995, and 1995-2005, where mean annual N rates increased from 7.7 kg ha(-1) yr(-1) to 94.01 kg ha(-1) yr(-1), followed by a decrease to 49.09 kg ha(-1) yr(-1) and then increased to 169.82 kg ha(-1) yr(-1). Fertilizer input rates were causing nutrient imbalances, contributing to acidification. A significant increase of fertilizer input, particularly ammonium nitrogen fertilizer, most likely caused the severe acidification in Ustic Cambisols and Dar Aquic Cambisols. We recommend that reduce annual rate of ammonium nitrogen fertilizer to avoid acidification. Efforts should be made to readjust soil nutrient inputs to reach an optimal, sustainable level.
源文献作者	IEEE
产权排序	1
会议录	2009 INTERNATIONAL CONFERENCE ON ENVIRONMENTAL SCIENCE AND INFORMATION APPLICATION TECHNOLOGY, VOL II, PROCEEDINGS
会议录出版者	IEEE COMPUTER SOC
会议录出版地	10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 USA
语种	英语
ISBN号	978-0-7695-3682-8
WOS记录号	WOS:000274010400053
内容类型	会议论文
源URL	[http://ir.imde.ac.cn/handle/131551/34932]
专题	成都山地灾害与环境研究所_成都山地所知识仓储（2009年以前）
通讯作者	Zhonghao Zhou
作者单位	1.Graduate University of Chinese Academy of Science, Chinese Academy of Science, Beijing 100049, China 2.Institute of Mountain Hazards and Environment, Chinese Academy of Science, Chengdu 610041, China;
推荐引用方式 GB/T 7714	Zhonghao Zhou,Shuhan Du,Gangcai Liu. Acidification of surface soil in croplands in the semiarid middle Tibet Plateau, China[C]. 见:. Wuhan. JUL 04-05, 2009.