Khan Zafar Iqbal, Ahmad Kafeel, Ashraf Iqra, Gondal Sumaira, Sher Muhammad, Hayat Zafar, Laudadio Vito, Tufarelli Vincenzo
Department of Biological Sciences, University of Sargodha, Pakistan.
Department of Chemistry, University of Sargodha, Pakistan.
Saudi J Biol Sci. 2015 May;22(3):249-55. doi: 10.1016/j.sjbs.2014.11.016. Epub 2014 Nov 20.
The present study aimed to evaluate the bioaccumulation of some macrominerals in grazing buffaloes fed forage irrigated with sewage water or canal water. In particular, the transfer of sodium (Na), magnesium (Mg), potassium (K) and calcium (Ca) from soil to plant and in turn to animals was evaluated under sub-tropical environmental conditions. Samples of soil, forage and buffalo hair were collected and digested by wet method. Sodium and K concentrations were significantly higher in the soil but lower in the forages; however, Mg and Ca concentrations in both soil and forages were higher. The correlation between soil, forage and hair showed an imbalanced flow of Na, Mg and K and a balanced flow of Ca from soil to forage and then to animals. Based on the findings, the highest rates of transfer of minerals were found for sewage water treatment, whereas lowest rates were found for canal water treatment, except for Na. As the transfer of minerals depends on their bioavailability, the highest values may be due to the high rates of mineral uptake by plants. Thus, the high transfer rate of some elements by plants could become toxic in future causing detrimental effect to grazing livestock.
本研究旨在评估以污水或渠水灌溉的牧草喂养的放牧水牛体内某些常量矿物质的生物累积情况。具体而言，在亚热带环境条件下，评估了钠（Na）、镁（Mg）、钾（K）和钙（Ca）从土壤到植物进而到动物的转移情况。采集了土壤、牧草和水牛毛发样本，并采用湿法进行消解。土壤中钠和钾的浓度显著较高，但牧草中的浓度较低；然而，土壤和牧草中镁和钙的浓度都较高。土壤、牧草和毛发之间的相关性表明，钠、镁和钾的流动不均衡，而钙从土壤到牧草再到动物的流动是平衡的。基于这些发现，除钠外，污水处理中矿物质的转移率最高，而渠水处理中矿物质的转移率最低。由于矿物质的转移取决于其生物有效性，最高值可能是由于植物对矿物质的高吸收率。因此，植物对某些元素的高转移率未来可能会变得有毒，对放牧牲畜造成有害影响。
