Gould Daniel H, Dargatz David A, Garry Franklyn B, Hamar Dwayne W, Ross Paul F
Department of Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins 80523, USA.
J Am Vet Med Assoc. 2002 Sep 1;221(5):673-7. doi: 10.2460/javma.2002.221.673.
To analyze the sulfur content of water and forage samples from a geographically diverse sample of beef cow-calf operations in the United States and to estimate frequency and distribution of premises where forage and water resources could result in consumption of hazardous amounts of sulfur by cattle.
Cross-sectional study.
709 forage samples from 678 beef cow-calf operations and individual water samples from 498 operations in 23 states.
Sulfur content of forage samples and sulfate concentration of water samples were measured. Total sulfur intake was estimated for pairs of forage and water samples.
Total sulfur intake was estimated for 454 pairs of forage and water samples. In general, highest forage sulfur contents did not coincide with highest water sulfate concentrations. Overall, 52 of the 454 (11.5%) sample pairs were estimated to yield total sulfur intake (as a percentage of dry matter) > or = 0.4%, assuming water intake during conditions of high ambient temperature. Most of these premises were in north-central (n = 19) or western (19) states.
Results suggest that on numerous beef cow-calf operations throughout the United States, consumption of forage and water could result in excessively high sulfur intake. All water sources and dietary components should be evaluated when assessing total sulfur intake. Knowledge of total sulfur intake may be useful in reducing the risk of sulfur-associated health and performance problems in beef cattle.
分析美国不同地理位置的肉牛母牛-犊牛养殖场水和饲料样本中的硫含量，并估计饲料和水资源可能导致牛摄入有害量硫的养殖场的频率和分布情况。
横断面研究。
来自23个州678个肉牛母牛-犊牛养殖场的709份饲料样本以及498个养殖场的个体水样。
测量饲料样本的硫含量和水样的硫酸盐浓度。估计饲料和水样对的总硫摄入量。
估计了454对饲料和水样的总硫摄入量。一般来说，饲料中硫含量最高的情况与水中硫酸盐浓度最高的情况并不一致。总体而言，假设在高温环境条件下饮水，454个样本对中有52个（11.5%）估计总硫摄入量（占干物质的百分比）≥0.4%。这些养殖场大多位于中北部（n = 19）或西部（19）各州。
结果表明，在美国众多肉牛母牛-犊牛养殖场，饲料和水的摄入可能导致硫摄入量过高。在评估总硫摄入量时，应评估所有水源和饮食成分。了解总硫摄入量可能有助于降低肉牛硫相关健康和生产性能问题的风险。
