关键词: 藏羔羊; 蛋白质水平; 尿沉渣; 尿路疾病

Abstract:

This research was aimed to study the effects of dietary protein levels on urinary sediments of early weaned Tibetan lambs. Ninety healthy two months old male Tibetan lambs with weaning weight (20.80±2.75) kg were chosen and randomly divided into three groups with thirty replicates per group and one lamb per replicate. The lambs in three groups were fed based diets with 10.8%(LP group), 12.0% (MP group) and 13.2%(HP group) crude protein, respectively,and the trial period lasted for 127 days. The results showed that:In HP group,the bladder and urethra of three lambs were damaged,and one lamb had bladder calculi,while there was no lamb had the above phenomenon in LP and MP groups,which meant that the relative low protein levels could reduce the incidence of urinary system diseases,so as to improve the health of lambs.The white blood cells and conductivity in LP group were volatile and there was no cast.The indexes of urine sediments in HP group were volatile,and the counts of white cell,red cell,crystals and yeast-like fungi were increasing with the increase of days.While the urine sediments in MP group were slight oscillation within the normal range,and there was no cast.Under the experimental condition,the dietary protein levels did had an impact on the urinary sediments in early weaned Tibetan lambs. When the dietary protein levels was 12.0%,the urinary sediments were best,and the urinary tissues were more complete,and conducive to production.

Key words: Tibetan lambs; protein levels; urinary sediments; uniary tract disease