Urea and salt as supplementary diet for crossbreed milk cows

This study aimed to evaluate the use of supplementary feed with different percentages of urea and mineral salt for crossbred milk cows. Ten animals were used, mean body weight 480 kg ± 9,7, distributed in a 5 x 5 double Latin square, with treatments of supplements with different urea and mineral salt percentages, namely, 10:10; 10:20; 20:10 and 20:20, completed to 100% with corn meal. Data underwent statistical analysis by SAS at 0.05 significance level. The use of supplements increased (p本研究旨在评估不同尿素（urea）与矿盐（mineral salt）配比的补充饲料对杂交奶牛（crossbred milk cows）的饲喂效果。试验选用10头平均体重为480 kg±9.7的个体，采用5×5双重拉丁方（double Latin square）试验设计，设置4种不同尿素与矿盐占比的补充饲料处理组，即10:10、10:20、20:10与20:20，剩余组分以玉米粉（corn meal）补足至总占比100%。试验数据采用SAS软件进行显著性水平为0.05的统计学分析，结果显示补充饲料的使用可显著提升（p