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How cattle grazing influences heavy metal concentrations in tropical pasture soils


Citation

Ajorlo, Majid and Abdullah, Ramdzani and Mohd Hanif, Ahmad Husni and Abd Halim, Mohd Ridzwan and Yusoff, Mohd Kamil (2010) How cattle grazing influences heavy metal concentrations in tropical pasture soils. Polish Journal of Environmental Studies, 19 (6). pp. 1369-1375. ISSN 1230-1485; ESSN: 2083-5906

Abstract

This study investigates the impact of short-term (1.5-year) heavy and long-term (33-year) moderate grazing intensities on the heavy metal concentrations in soils of tropical pastures. The concentration of heavy metals (Cd, Fe, Mn, Cu, Cr, Pb, and Zn) was determined in the Livestock Section of University Putra Malaysia, Selangor, Malaysia. The heavy metal concentrations in the soil were not affected (P>0.05) by shortterm heavy grazing intensity. The concentrations of Fe, Mn, and Zn were significantly affected (P≤0.05) by long-term moderate grazing or soil depth and by the interaction between them. The Cu concentration in soil was only affected (P<0.05) by grazing, but not (P>0.05) by sampling depth or their interaction. The concentrations of Fe, Mn, Cu, and Zn in long-term moderately grazed pasture soil were 127.9, 194.8, 54.8, and 39,900% higher, respectively, than ungrazed pasture. Soil Fe, Mn, and Zn concentrations were significantly higher (P<0.05) in surface (0-10 cm) than subsurface (10-20 cm) soils. Results suggest that the excreta of grazing cattle can be an important source of heavy metals in intensively managed pastures in the long-term. However, metal concentrations were maintained within the normal range and were not high enough to be dangerous from the toxicological point of view.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Agriculture
Faculty of Environmental Studies
Publisher: HARD Publishing
Keywords: Heavy metals; Intensively managed pasture; Long-term moderate grazing; Short-term heavy grazing; Malaysia
Depositing User: Norhazura Hamzah
Date Deposited: 30 Mar 2011 00:57
Last Modified: 14 Nov 2019 02:58
URI: http://psasir.upm.edu.my/id/eprint/11326
Statistic Details: View Download Statistic

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