Department of Biological Sciences, Fuyang Normal University, Qing He West Road No. 100, Fuyang, 236037, Anhui, China.
Department of Botany, University of Sargodha, Lahore, Punjab, Pakistan.
Environ Sci Pollut Res Int. 2020 Oct;27(29):36579-36586. doi: 10.1007/s11356-020-09599-y. Epub 2020 Jun 20.
At present, the forage production is the foundation of beef cattle and sheep industries in graziery. This study was designed to assess the toxic metal composition of the conventional pastures and non-conventional pastures in consideration of mineral needs of ruminants. At all the surveyed sites, these mean soil metal concentrations were measured to be higher or lower than the referred threshold levels. Specifically, these concentrations of Co, Pb, and Cr were observed as much higher than the referred threshold levels of 0.01-0.06 mg/kg (Co), 0.05 mg/kg (Pb), and 0.02 mg/kg (Cr). On the contrary, the mean soil concentrations of Cd were observed to be relatively lower than the threshold levels of 0.50-10 mg/kg at all sites. The estimated mean concentrations of Co, Cd, Pb, and Cr in both conventional and non-conventional forage species were measured to be lower than the referred threshold levels. The supplementation of these metals for livestock grazing from pasture was unnecessary based on these findings. However, further research should be conducted for ecological safety and conservation of ruminant forages, so that both the conventional and non-conventional pastures are employed as livestock friendly consuming forages.
目前，饲料生产是畜牧业牛和羊产业的基础。本研究旨在评估常规牧场和非常规牧场的有毒金属组成，以考虑反刍动物的矿物质需求。在所调查的所有地点，这些土壤金属浓度的平均值均高于或低于参考阈值水平。具体而言，Co、Pb 和 Cr 的浓度明显高于参考阈值水平（Co：0.01-0.06mg/kg，Pb：0.05mg/kg，Cr：0.02mg/kg）。相比之下，所有地点的 Cd 的土壤浓度平均值均低于 0.50-10mg/kg 的参考阈值水平。常规和非常规饲料种中 Co、Cd、Pb 和 Cr 的估计平均浓度均低于参考阈值水平。根据这些发现，牲畜放牧从牧场摄取这些金属是不必要的。然而，应该进行进一步的研究以确保反刍动物饲料的生态安全和保护，以便将常规和非常规牧场都用作对牲畜友好的消耗性饲料。
