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	Spatio-temporal Variability of Soil nitrogen in North China Plain Using Geostatistical Analysis
	Dong Y. H. ; Zhu O. Y. ; Liu S. L.
	2009
关键词	soil nitroge geostatistical analysis spatio-temporal variabilit county scale spatial variability moisture catchment indexes region
页码	147-149
英文摘要	Large changes in land use and land management, which have had a tremendous impact on soil nutrients, have occurred in north China in recent years. Soil nitrogen is more influenced by human activities as the fertilizer application. We compared soil nitrogen in Yucheng County of Shandong province in 2003 to 1980 results from the Second National Soil Survey. The average contents of total nitrogen in 2003 were significantly higher than in 1980. Soil nitrogen increased from 0.68 to 0.84 mg/kg. Spatial variability of soil nitrogen was medium and characterized by coefficients of variation (CV) 22% and 28% in 1980 and 2003, respectively. Then geostatistical analysis was used to find the spatio-temporal variability of soil nitrogen. The results showed that the spatial distribution of soil nitrogen changed greatly between 1980 and 2003. Soil nitrogen showed increasing trends in Yucheng. And Zhangzhuang, Fangsi and Shiliwang towns showed the highest increase in soil nitrogen. The increase in soil nitrogen was contributed to increased application of chemical fertilizer. Among these towns in Yucheng, these with most obviously increase of soil nitrogen had the higher application of chemical fertilizers.
收录类别	CPCI
会议录出版者	Ieee Computer Soc
语种	英语
ISBN号	978-0-7695-3600-2
内容类型	会议论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/25075]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Dong Y. H.,Zhu O. Y.,Liu S. L.. Spatio-temporal Variability of Soil nitrogen in North China Plain Using Geostatistical Analysis[C]. 见:.

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