为探索发酵菌剂在巨菌草青贮中的效果,以不添加任何菌剂为对照,研究了3种发酵菌剂(EM菌液、聚能发酵剂、酶菌复合剂)对巨菌草青贮发酵品质的影响。结果表明,在巨菌草中添加微生物发酵菌剂后,一定程度上改善了青贮饲料的品质,使巨菌草青...为探索发酵菌剂在巨菌草青贮中的效果,以不添加任何菌剂为对照,研究了3种发酵菌剂(EM菌液、聚能发酵剂、酶菌复合剂)对巨菌草青贮发酵品质的影响。结果表明,在巨菌草中添加微生物发酵菌剂后,一定程度上改善了青贮饲料的品质,使巨菌草青贮饲料pH降低,中性洗涤纤维减少,营养成分得到较好的保存。其中以每1 t巨菌草揉丝原料添加2 L EM菌液处理组效果最好,不仅降低了巨菌草青贮饲料的pH,而且提高了粗蛋白含量,是3种供试发酵菌剂中的最优菌剂。展开更多
[ Objective ] This experiment was conducted to study the effects of dietary betaine on peiformance, egg quality and serum biochemical parameters of lay- ing hens under heat stress condition. [ Method] A total of 600 2...[ Objective ] This experiment was conducted to study the effects of dietary betaine on peiformance, egg quality and serum biochemical parameters of lay- ing hens under heat stress condition. [ Method] A total of 600 22-week-old commercial Roman laying hens were randomly divided into five groups, with eight repli- cates in each group and 15 hens in each replicate. Group I was taken as the positive control group, and laying hens in group ] were fed with basal diets in anrmal thermal environment. Temperature humidity index of group 1 was between 64.9 and 68.9. Group II was taken as the negative control group, and laying hens in group II were fed with basal diets under heal stress condition. Temperature humidity index of group II was higher than 72. laying hens in groups llI-V were fed with basal diets supplemented with 200,400 and 600 mg/kg betaine under heat stress condition respectively, and temperature humidity indexes in groups III-V were all higher than 72. The experiment lasted for 14 weeks. [ Results ] Results showed that there were no significant differences in average daily feed intake, feed egg ratio and broken egg rate among different test groups （P 〉 0.05 ）. Hen-housed laying rate, hen-housed egg yield, serum total protein （TP） content and serum alkaline phosphatase （AKP） activity in group II were significantly lower than those in group I（ P 〈0.05 ）. However, activities of glutamic-oxalacetic transaminase （GOT）, creatine kinase （CK） and glutamic-pyruvic transaminase （GPT） in group II were significantly higher than those in group i （P 〈0.05 ）. Hen-housed laying rate, hen-housed egg yield and serum TP content in group IV were significantly higher than those in group II（ P 〈 0.05 ）. Hen-housed egg yield, serum TP eontent and serum albumin （ALB） content in group V were significantly higher than those in group II（P 〈0.05）. Activities of serum CK and Girl in groups IV and V were significantly lower than those in group II （ P 〈 0.05 ）, serum triglyceride （TG） content in group V was significantly lower than that in group 11 （ P 〈 0.05 ）. [ Conclusion] Metabolism and physiological function of laying hens could be affected by heat stress, and which caused a decline in performance. Adding of dietary betaine in diets could improve hen-housed egg production and hen-housed laying rate, which could also improve the health of laying hens under heat stress condi- tion. The appropriate dietary adding content of betaine was 400 mg/kg.展开更多
文摘为探索发酵菌剂在巨菌草青贮中的效果,以不添加任何菌剂为对照,研究了3种发酵菌剂(EM菌液、聚能发酵剂、酶菌复合剂)对巨菌草青贮发酵品质的影响。结果表明,在巨菌草中添加微生物发酵菌剂后,一定程度上改善了青贮饲料的品质,使巨菌草青贮饲料pH降低,中性洗涤纤维减少,营养成分得到较好的保存。其中以每1 t巨菌草揉丝原料添加2 L EM菌液处理组效果最好,不仅降低了巨菌草青贮饲料的pH,而且提高了粗蛋白含量,是3种供试发酵菌剂中的最优菌剂。
基金Supported by Gansu Academy of Agricultural Sciences Youth Fund Project(2014GAAS33)Agricultural Science and Technology Innovation Project of Gansu Academy of Agricultural Sciences(2013GAAS04)
文摘[ Objective ] This experiment was conducted to study the effects of dietary betaine on peiformance, egg quality and serum biochemical parameters of lay- ing hens under heat stress condition. [ Method] A total of 600 22-week-old commercial Roman laying hens were randomly divided into five groups, with eight repli- cates in each group and 15 hens in each replicate. Group I was taken as the positive control group, and laying hens in group ] were fed with basal diets in anrmal thermal environment. Temperature humidity index of group 1 was between 64.9 and 68.9. Group II was taken as the negative control group, and laying hens in group II were fed with basal diets under heal stress condition. Temperature humidity index of group II was higher than 72. laying hens in groups llI-V were fed with basal diets supplemented with 200,400 and 600 mg/kg betaine under heat stress condition respectively, and temperature humidity indexes in groups III-V were all higher than 72. The experiment lasted for 14 weeks. [ Results ] Results showed that there were no significant differences in average daily feed intake, feed egg ratio and broken egg rate among different test groups （P 〉 0.05 ）. Hen-housed laying rate, hen-housed egg yield, serum total protein （TP） content and serum alkaline phosphatase （AKP） activity in group II were significantly lower than those in group I（ P 〈0.05 ）. However, activities of glutamic-oxalacetic transaminase （GOT）, creatine kinase （CK） and glutamic-pyruvic transaminase （GPT） in group II were significantly higher than those in group i （P 〈0.05 ）. Hen-housed laying rate, hen-housed egg yield and serum TP content in group IV were significantly higher than those in group II（ P 〈 0.05 ）. Hen-housed egg yield, serum TP eontent and serum albumin （ALB） content in group V were significantly higher than those in group II（P 〈0.05）. Activities of serum CK and Girl in groups IV and V were significantly lower than those in group II （ P 〈 0.05 ）, serum triglyceride （TG） content in group V was significantly lower than that in group 11 （ P 〈 0.05 ）. [ Conclusion] Metabolism and physiological function of laying hens could be affected by heat stress, and which caused a decline in performance. Adding of dietary betaine in diets could improve hen-housed egg production and hen-housed laying rate, which could also improve the health of laying hens under heat stress condi- tion. The appropriate dietary adding content of betaine was 400 mg/kg.
