Salih Y M, McDowell L R, Hentges J F, Mason R M, Conrad J H
Trop Anim Health Prod. 1983 Nov;15(4):245-51. doi: 10.1007/BF02242070.
An experiment was conducted to determine the mineral status of purebred Brahman beef cattle grazing Bermuda--Bahia pastures grown on sandy, well-drained soils in Central Florida. Soil, plant, blood serum and liver tissue concentrations of calcium, potassium, sodium, magnesium, manganese and cobalt were generally adequate. Sixty-nine per cent of forages and 40% of serum samples were deficient in phosphorus. Seventy-five per cent of soils, 38% of forages and 18% of liver samples were deficient in copper. Sixty-nine per cent of forage samples were low, less than 30 ppm, in iron. All samples of forage, liver and serum were deficient in selenium. Likewise, all soil and forage samples and 47 and 88% of serum and liver samples, respectively, were deficient in zinc. Mineral elements most likely deficient and needed in supplements for grazing cattle on sandy, well-drained soils in the warm climate region of Central Florida are phosphorus, copper, selenium and zinc.
进行了一项实验，以确定在佛罗里达州中部排水良好的沙质土壤上生长的百慕大-巴伊亚牧场上放牧的纯种婆罗门肉牛的矿物质状况。土壤、植物、血清和肝脏组织中的钙、钾、钠、镁、锰和钴含量总体上是充足的。69%的草料和40%的血清样本磷含量不足。75%的土壤、38%的草料和18%的肝脏样本铜含量不足。69%的草料样本铁含量低，低于30 ppm。所有草料、肝脏和血清样本硒含量不足。同样，所有土壤和草料样本以及分别47%和88%的血清和肝脏样本锌含量不足。在佛罗里达州中部温暖气候地区排水良好的沙质土壤上放牧的牛最有可能缺乏且需要在补充剂中添加的矿物质元素是磷、铜、硒和锌。
