摘要
本研究旨在研究菌酶复合制剂对奶牛产奶性能及粪便结构的影响。选择胎次相近(2~3胎),泌乳天数143~181 d荷斯坦奶牛120头,随机分成2组(对照组和试验组)。对照组饲喂基础饲粮,试验组饲喂基础饲粮+菌酶复合制剂(30 g/头/d)。预试期7 d,正试期35 d。测定并计算各处理组预试期、试验期1(D1~7)、试验期2(D8~14)、试验期3(D15~21)、试验期4(D22~28)、试验期5(D29~35)的日平均产奶量(MY)和日平均采食量(DMI);在试验期,每隔7 d从各处理组随机抽取10头奶牛粪便3 kg并充分混合均匀,采用粪分析筛分析。结果表明,同对照组相比,试验组DMI无显著差异(P>0.05);在预试期和试验期1,MY和料乳比差异不显著(P>0.05);在试验期2和试验期3,试验组MY显著增加(P<0.05),料乳比显著降低(P<0.05);在试验期4和试验期5,试验组MY高于对照组,料乳比低于对照组,但差异均不显著(P>0.05)。在试验期1~试验期7,试验组上层粪便占比显著小于对照组(P<0.05),试验组下层粪便占比显著大于对照组(P<0.05)。综上,日粮中添加菌酶复合制剂能显著提高饲喂期间奶牛产奶性能,提高产奶量及饲料转化效率,尤其提高粗饲料利用效率。
In order to study the effect of bacterial-enzyme compound preparation on milk performance and fecal structure of dairy cows, 120 Holstein cows with similar parity(2 ~3 parities), similar lactation days(between 143 and 181 days) were selected and divided averagely into 2 groups(control group and experimental group). The cows in the control group were fed with TMR, while the cows in the experimental group were fed with TMR and the bacterial-enzyme compound preparation which 30 g/d for per cow every day. The trial period of the study was 42 days, including 7 days of adaptation and 35 days of experiment. The average daily milk yield(MY) and the average daily dry matter intake(DMI) were measured and calculated in adaptation period, trial period 1(Day1 to 7), trial period 2(Day8 to14), trial period 3(Day15 to 21), trial period 4(Day22 to 28), trial period5(Day29 to 35), respectively. Every other week, 3 kg feces of 10 cows which were randomly selected from each group were mixed evenly and analyzed by fecal analytical sieve. The results showed that compared with the control group, the DMI of the experimental group had no significant difference(P >0.05);in the adaptation period and the trial period 1, the MY and feed to milk ratio of the experimental group and the control group were not significantly different(P>0.05);in trial period 2 and 3, the MY of the experimental group increased significantly(P<0.05), the feed to milk ratio is significantly reduced(P<0.05);in trial period 4 and 5, the MY of the experimental group was higher than that of the control group,and the feed-to-milk ratio was lower than that of the control group, but their differences were not significant(P <0.05). During trial period 1 to 7, the proportions of feces in the upper layer of the experimental group were significantly lower than those of the control group(P<0.05), and the proportions of feces in the lower layer of the experimental group were significantly greater than those of the control group(P<0.05). The above results indicated that adding the bacterial-enzyme compound preparation in diet can significantly improve the milk production performance and diet digestibility of dairy cows during feeding, increase the MY and the feed conversion efficiency of dairy cows, especially improve the utilization efficiency of roughage.
作者
郭宝珠
王申
王晓芳
郭田顺
周燕玲
马梁华
关琛
武二斌
郭健
GUO Bao-zhu;WANG Shen;WANG Xiao-fang;GUO Tian-shun;ZHOU Yan-ling;MA Liang-hua;GUAN Chen;WU Er-bin;GUO Jian(Animal Husbandry Technology Promotion Station of Zhangjiakou,Zhangjiakou Hebei 075000,China;Guangzhou VTR Bio-Tec Co.,Ltd,Zhuhai Guangzhou 519060,China;Hebei Animal Husbandry and Veterinary Academy,Baoding Hebei 071000,China)
出处
《草食家畜》
2021年第3期11-17,共7页
Grass-Feeding Livestock
基金
河北省现代农业产业技术体系奶牛产业创新团队建设项目(HBCT2018120202)。
关键词
菌酶复合制剂
奶牛
平均日产奶量
DMI
粪便结构
bacterial-enzyme compound preparation
dairy cows
average daily milk yield
dry matter intake
fecal structure
