动物营养学报2019，Vol.31Issue(6)：2907-2914,8.DOI:10.3969/j.issn.1006⁃267x.2019.06.052
酵母硒对杜寒杂交羊生长性能、血常规和血清生化指标的影响
Effects of Selenium Yeast on Growth Performance, Blood Routine and Serum Biochemical Indexes of Dorper×Thin?Tailed Han Crossbred Sheep
摘要
Abstract
This experiment was conducted to study the effects of dietary selenium yeast on the growth perform?ance, blood routine and serum biochemical indexes of Dorper×thin?tailed Han crossbred sheep. Forty Dorper× thin?tailed Han crossbred weaning lambs with the similar body weight ( about 34 kg) and good health were ran?domly assigned to 4 groups with 10 sheep in each group, and all sheep were housed in individual pen. Sheep in the 4 groups were fed experimental diets supplemented with 0 ( control) , 0.2, 0.4 and 0.8 mg/kg selenium ( the form was selenium yeast) based on a basal diet, and the measured values of the selenium content in the experimental diets were 0.074 ( control) , 0.307, 0.491 and 0.846 mg/kg, respectively. The experiment lasted for 10 days for adaption, and 20 days for test. The results showed as follows: average daily gain ( ADG) was firstly increased and then decreased with selenium supplemental level increasing, and the highest value of ADG was found when selenium supplemental level was 0.2 mg/kg. The lowest value of feed/gain ( F/G) was found when selenium supplemental level was 0.2 mg/kg, and it was significantly lower than that in the other three groups ( P＜0.01). The highest platelet count was found when selenium supplemental level was 0.8 mg/kg, and it had significant difference compared with the other three groups ( P＜0.01). The highest basophilic granu?locytes ( BASO) percentage was found when selenium supplemental level was 0.8 mg/kg, and it had signifi?cant difference compared with the 0.4 mg/kg group ( P＜0.01). Dietary supplemented with different levels of selenium had no significant effects on other blood routine indexes ( P＞0.05). The highest values of serum total protein ( TP) , urea nitrogen ( UN) and creatinine ( CREA) contents were found when selenium supplemental level was 0.8 mg/kg, and they had significant differences compared with the other groups ( P＜0.05 or P＜0.01). The activities of serum alanine aminotransferase ( ALT ) and aspartate aminotransferase ( AST ) in 0.8 mg/kg group were the highest, which were significantly higher than those in the control group ( P＜0.05 or P＜0.01). The serum alkaline phosphatase activity in control group had the highest value, and it had no signifi?cant difference compared with 0.2 mg/kg group ( P＞0.05). The highest value of serum γ?glutamyltransferase ( γ?GGT) activity was found when selenium supplemental level was 0.8 mg/kg, and it had significant differ?ence compared with the other groups ( P＜0.01). Phosphonium content in serum was the highest when selenium supplemental level was 0.8 mg/kg, and it had significant difference compared with 0.2 and 0.4 mg/kg groups ( P＜0.01). Iron content in serum was the lowest when selenium supplemental level was 0.8 mg/kg, which was significantly lower than that in control group ( P＜0.01) , and it in 0.4 mg/kg group was also significantly low?er than that in control group ( P＜0.01). Considering all indexes of this experiment, the appropriate selenium ( the form is selenium yeast) supplemental level is 0.2 mg/kg in the diet of Dorper×thin?tailed Han crossbred sheep, and the measured value of selenium content in the diet is 0.307 mg/kg.[ Chinese Journal of Animal Nutrition, 2019, 31(6) :2907?2914]关键词
酵母硒/杜寒杂交羊/生长性能/血常规指标/血清生化指标Key words
selenium yeast/Dorper×thin⁃tailed Han crossbred sheep/growth performance/blood routine in⁃dexes/serum biochemical indexes分类
农业科技引用本文复制引用
张永翠,程光民,何孟莲,徐相亭..酵母硒对杜寒杂交羊生长性能、血常规和血清生化指标的影响[J].动物营养学报,2019,31(6):2907-2914,8.基金项目
山东省现代农业产业技术体系羊产业创新团队( SDAIT⁃10⁃05) （ SDAIT⁃10⁃05）
