Changes in soil properties and the availability of soil micronutrients after 18 years of cropping and fertilization

ISWC OpenIR > 水保所知识产出(1956---)

	Changes in soil properties and the availability of soil micronutrients after 18 years of cropping and fertilization
	Wei Xiaorong; Hao Mingde; Shao Mingan; Wei, XR
	2006
发表期刊	SOIL & TILLAGE RESEARCH
卷号	91 期号:1-2 页码:120-130
摘要	Micronutrient deficiencies are common in many parts of China's Loess Plateau. The objective of this experiment was to study the effects of long-term cropping and fertilization practices on soil properties and micronutrient availability in this region. The field plot experiment began in 1984. It included five cropping systems and four fertilizer treatments. In September 2002, soil samples were collected and soil pH, organic matter content, available P, and CaCO3 were measured. Total and available Zn, Cu, Mn, and Fe were also determined. The relationship between soil properties and available micronutrients was determined by correlation and path analysis. After 18 years, soil pH and CaCO3 levels were lower in the cropped and fertilized treatments compared to the fallow treatment. In contrast, soil organic matter and available P levels were higher in cropped compared to fallow treatments. A comparison of unfertilized treatments indicated that available Zn and Cu levels in cropped treatments were lower compared to the fallow treatment, probably due to the removal of these micronutrients from the system through crop uptake and harvest. In contrast, available Mn and Fe levels were higher in cropped treatments compared to the fallow treatment. The impacts of fertilization on available micronutrients varied with cropping systems. Generally, available Zn and Fe were higher in fertilized compared to unfertilized treatments, but available Cu was not significantly influenced by fertilization. Fertilization tended to increase available Mn in continuous wheat and maize, but reduced available Mn in continuous clover and the crop-legume rotation. The total (plant available + unavailable) micronutrient contents were lower in the four cropped-treatments compared to the fallow treatment. The addition of manure or P fertilizer increased total Zn, Fe, and Mn, but had no significant effect on total Cu. The results of correlation analysis and path analysis indicated that soil organic matter exerts a significant and direct effect on the availability of Zn, Mn, and Fe, but has little influence on available Cu. The effects of available P, CaCO3, and pH on micronutrient availability were indirect, passing through soil organic matter. The results of this study suggest that longterm cropping and fertilization altered several important soil properties and increased the plant available micronutrient content of this loess-derived soil. (c) 2005 Elsevier B.V. All rights reserved.
关键词	Cropping Fertilization Soil Properties Micronutrients Availability
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	sbir.nwafu.edu.cn/handle/361005/4869
专题	水保所知识产出(1956---)
通讯作者	Wei, XR
推荐引用方式 GB/T 7714	Wei Xiaorong,Hao Mingde,Shao Mingan,et al. Changes in soil properties and the availability of soil micronutrients after 18 years of cropping and fertilization[J]. SOIL & TILLAGE RESEARCH,2006,91(1-2):120-130.
APA	Wei Xiaorong,Hao Mingde,Shao Mingan,&Wei, XR.(2006).Changes in soil properties and the availability of soil micronutrients after 18 years of cropping and fertilization.SOIL & TILLAGE RESEARCH,91(1-2),120-130.
MLA	Wei Xiaorong,et al."Changes in soil properties and the availability of soil micronutrients after 18 years of cropping and fertilization".SOIL & TILLAGE RESEARCH 91.1-2(2006):120-130.

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