过瘤胃蛋氨酸和肉桂醛组合添加对奶牛产奶性能及氮排泄的影响

发布时间：2018-03-17 02:33

本文选题：过瘤胃蛋氨酸　切入点：肉桂醛　出处：《动物营养学报》2017年09期 　论文类型：期刊论文

【摘要】：本试验旨在研究过瘤胃蛋氨酸(RPMet)和肉桂醛(CA)组合添加对奶牛产奶性能及氮排泄的影响。选取年龄、体重、胎次、产奶量、乳成分及泌乳期[(90±15)d]相近的荷斯坦奶牛40头分为10组,每组4头。对照(C)组饲喂基础饲粮,试验组补饲不同水平的RPMet和CA,其中RPMet设3个水平,分别为20(L)、25(M)、30(H)g/(d·头);CA设3个水平,分别为15(L)、18(M)、21(H)g/(d·头),共组成9个不同水平组合,分别为LL、ML、HL、LM、MM、HM、LH、MH、HH(第1个字母为RPMet添加水平,第2个字母为CA添加水平)。预试期15d,正试期60d。结果表明:1)除LH组外,各试验组产奶量均显著或极显著高于C组(P0.05或P0.01),以HL组最高。2)各试验组乳脂率和乳蛋白率均高于C组,均以HL组最高,与C组均差异极显著(P0.01);各试验组乳体细胞数均低于C组,以HL组最低,与C组均差异极显著(P0.01)。3)除LH组外,各试验组氮表观消化率和氮泌乳转化效率均显著或极显著高于C组(P0.05或P0.01),以HL组最高;LL、ML、HL、LM、MM、HM、LH、MH、HH组总氮排泄量比C组分别降低了17.45%(P0.01)、18.79%(P0.01)、20.80%(P0.01)、10.41%(P0.01)、12.49%(P0.01)、15.22%(P0.01)、3.37%(P0.05)、5.12%(P0.05)、7.43%(P0.05),以HL组最低。结果提示,在泌乳奶牛饲粮中联合添加RPMet和CA可以提高奶牛产奶性能、降低奶牛氮排泄量;综合考虑上述指标,最佳组合为RPMet 30g/(d·头)、CA 15g/(d·头)。
[Abstract]:The purpose of this study was to study the effects of rumen methionine (RPMet) and cinnamaldehyde (CAA) on milk yield and nitrogen excretion in dairy cows. Forty Holstein cows with similar age, body weight, birth order, milk yield, milk composition and lactation period [90 卤15 days] were divided into 10 groups. Each group was fed with basic diet, and the experimental group was fed with different levels of RPMet and CA.The experimental group was fed with three levels of RPMet, including three levels of 20 L / L, respectively, of which there were 3 levels of CA at 30 h / g / g / d 路head ~ (-1), respectively, and a total of 9 different level combinations were formed. The results showed that: (the first letter is RPMet addition level, the second letter is CA addition level, the pretest period is 15 days, and the current test period is 60 days. The results show that the first letter is RPMet addition level, and the second letter is CA addition level. The results show that: 1: 1) except LH group, the first letter is RPMet addition level, the second letter is CA addition level, the pretest period is 15 days, and the positive test period is 60 days. The milk fat rate and milk protein rate of all experimental groups were higher than that of C group (P 0.05 or P 0.01), the milk fat rate and milk protein rate of HL group were higher than that of C group, and the difference between HL group and C group was very significant (P 0.01), and the number of milk somatic cells in each trial group was lower than that in C group. HL group was the lowest, and there was significant difference between HL group and C group (P 0.01g. 3) except LH group, there was no significant difference between HL group and C group, except LH group. The apparent nitrogen digestibility and lactation conversion efficiency of each group were significantly or extremely higher than those of group C (P0.05 or P0.01C), and the total nitrogen excretion of HLLMLM MMHMHHHHH group was 17.45% lower than that of group C (P 0.0118.79), respectively. The results showed that the lowest level was found in the HL group, the lowest in the HL group, and the lowest in the HL group. The combination of RPMet and CA in the diet of lactating cows could improve the milk yield and reduce the nitrogen excretion of dairy cows, and the best combination was RPMet 30 g / d 路head C15 g / d.
【作者单位】：青岛农业大学动物科技学院;青岛市畜牧兽医研究所;
【基金】：基金项目:山东省现代农业产业技术体系牛产业创新团队(SDAIT-09-08)
【分类号】：S823.5

【相似文献】