Khan Zafar Iqbal, Ahmad Kafeel, Ashraf Muhammad, Naqvi Syed Ali Hassan, Seidavi Alireza, Akram Nudrat Aisha, Laudadio Vito, Tufarelli Vincenzo
Department of Botany, University of Sargodha, Sargodha, 40100, Pakistan,
Trop Anim Health Prod. 2015 Mar;47(3):563-6. doi: 10.1007/s11250-015-0763-1. Epub 2015 Jan 24.
The current research on the manganese (Mn) transfer from soil to plant as well as to grazing Kajli rams in the form of sampling periods was carried out under semi-arid environmental conditions. Forage, soil and blood plasma samples were collected during 4 months of the year after a 1-month interval, and Mn concentrations were assessed after wet digestion using an atomic absorption spectrophotometer. Results showed that Mn concentration in soil ranged from 48.28 to 59.44 mg/kg, with incoherent augment and decline across sampling periods, and effect of sampling period on soil Mn was also found to be significant (P < 0.05). The mean levels of Mn in soil appeared higher than the critical value and sufficient for forage crop requirement. The Mn concentration in forage ranged between 24.8 and 37.2 mg/kg, resulting deficient based on the requirement allowance of Mn for livestock grazing animals, therein with almost unchanged forage Mn concentration. The Mn values in blood plasma of rams varied from 0.066 to 0.089 mg/l, with a consistent increase based on sampling period, and the effect of sampling periods on plasma Mn was found to be highly significant (P < 0.05). The Mn levels in ram blood plasma were lesser than the normal level suggesting reasonable need for supplementation. Our study revealed the role of Mn availability in soil and plant species amassing capability on the transport of Mn in the soil-plant-animal system. Results indicated a much higher accumulation rate at the sampling characterized by vegetation dominated by legumes in comparison to grasses, crop residues and mixed pasture and a pronounced seasonal supply of Mn at the four sampling period of grazing land of diverse botanical composition.
本研究在半干旱环境条件下，以采样周期的形式对锰（Mn）从土壤向植物以及向放牧的卡吉里公羊的转移情况进行了研究。在一年中的4个月里，每隔1个月采集一次牧草、土壤和血浆样本，采用原子吸收分光光度计对湿消化后的样本进行锰浓度评估。结果表明，土壤中锰的浓度范围为48.28至59.44mg/kg，在不同采样周期内呈现出不连贯的增减变化，且采样周期对土壤锰的影响也具有显著性（P<0.05）。土壤中锰的平均含量高于临界值，足以满足饲料作物的需求。牧草中锰的浓度在24.8至37.2mg/kg之间，根据放牧牲畜对锰的需求标准，该浓度处于缺乏水平，且牧草中锰的浓度几乎没有变化。公羊血浆中的锰含量在0.066至0.089mg/l之间，随着采样周期的增加而持续上升，采样周期对血浆锰的影响具有高度显著性（P<0.05）。公羊血浆中的锰含量低于正常水平，表明需要进行合理的补充。我们的研究揭示了土壤中锰的有效性以及植物物种积累能力在土壤-植物-动物系统中锰运输过程中的作用。结果表明，与禾本科植物、作物残茬和混合牧场相比，以豆科植物为主的植被采样期锰的积累速率要高得多，且在不同植物组成的放牧地的四个采样期，锰的季节性供应明显。
