CAJ | 학술논문

试验选用体重500±20kg、年龄3．5岁、装有永久性瘤胃瘘管的西门塔尔牛阉牛4头，采用4×4拉丁方试验设计，以混合精料和风干玉米秸秆为基础日粮，研究日粮中添加产酶益生素（0、10、20和30g-d-1）对西门塔尔牛能量平衡、氮平衡的影响。结果表明，日粮添加产酶益生素后，20g-d-1组消化能和代谢能显著高于对照组（P〈0．05），20和30g·d-1组沉积能显著高于对照组（P〈0．05）；20和30g·d-1组尿氮排泄量显著低于对照组（P〈0．05），而沉积氮显著高于对照组（P〈0．05），试验结果证明，产酶益生素的适宜添加水平为20g·d-1。
시험선용체중500±20kg、년령3．5세、장유영구성류위루관적서문탑이우엄우4두，채용4×4랍정방시험설계，이혼합정료화풍간옥미갈간위기출일량，연구일량중첨가산매익생소（0、10、20화30g-d-1）대서문탑이우능량평형、담평형적영향。결과표명，일량첨가산매익생소후，20g-d-1조소화능화대사능현저고우대조조（P〈0．05），20화30g·d-1조침적능현저고우대조조（P〈0．05）；20화30g·d-1조뇨담배설량현저저우대조조（P〈0．05），이침적담현저고우대조조（P〈0．05），시험결과증명，산매익생소적괄의첨가수평위20g·d-1。
Four Simmental steers（BW 500±20 kg, 3.5 years old） with permanent rumen cannula consuming corn straw diet were used in a 4 × 4 Latin square design and supplemented with four concentrations（0, 10, 20 and 30 g· d-1） of supplemental E-probiotics to evaluate the effects of different E-probiotics concentration on energy metabolism and nitrogen balance of steers. The results showed that, digestible energy, metabolizable energy in 20 g·d-1 group was higher than control group significantly（P〈0.05）. Energy retention in 20 and 30 g· d i were higher than 10 g. d-1 group and control group significantly（P〈0.05）. Urine nitrogen were lower in 20 and 30 g· d -1 group than control group significantly（P〈0.05）, but retention nitrogen were higher than control group significantly（P〈0.05）. These results indicated that the optimum dose of E-probiotics supplementation was 20 g· d-1.