Bavarian State Research Center for Agriculture, Institute for Animal Nutrition and Feed Management, Prof.-Duerrwaechter-Platz 3, 85586 Poing-Grub, Germany.
Technical University of Munich, Chair of Animal Nutrition, Liesel-Beckmann-Strasse 2, 85354 Freising, Germany.
Meat Sci. 2022 Dec;194:108977. doi: 10.1016/j.meatsci.2022.108977. Epub 2022 Sep 10.
This research aimed to generate basic data for specifying the macro mineral requirements of beef bulls. Hence, the contents of the macro minerals calcium, phosphorus, sodium, potassium, sulfur, and magnesium in the empty body and body tissue fractions of growing Fleckvieh (German Simmental) bulls with 120-780 kg live weight were determined. Results were used to calculate mineral gain rates in bulls within a wide weight range from 100 to 800 kg live weight. Calcium and phosphorus represented the largest shares in the animals' bodies. Body mineral content changed during animal growth due to progressing bone mineralization and increasing amounts of fat in all body tissues. Peak mineral gain rates were observed for calcium, phosphorus, and magnesium during the 200-400 kg live weight range. The gain rates of sodium, potassium, and sulfur declined steadily during cattle growth. The provided data allow to adjust the existing values of net mineral requirements of growing Fleckvieh bulls within the factorial requirement calculation method.
本研究旨在为确定肉牛的宏量矿物质需求提供基础数据。因此，测定了 120-780kg 活重的德系西门塔尔公牛（Fleckvieh）空体和体组织部分中宏量矿物质钙、磷、钠、钾、硫和镁的含量。结果用于计算活重 100-800kg 范围内公牛的矿物质增重率。钙和磷在动物体内占比最大。随着动物生长，由于骨骼矿化和所有体组织中脂肪含量的增加，体矿物含量发生变化。在 200-400kg 活重范围内，观察到钙、磷和镁的矿物质增重率达到峰值。随着牛的生长，钠、钾和硫的增重率稳步下降。提供的数据可用于调整基于析因需求计算方法的德系西门塔尔公牛生长阶段的净矿物质需求的现有值。
