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- Title
有机微量矿物质替代日粮中无机微量矿物质 对泌乳中后期奶牛血清生化指标、瘤胃发酵参数、 表观消化率和生产性能的影响.
- Authors
马兴军; 查满千; 金志华; 张 睿; 刁其玉; 屠 焰; 成述儒
- Abstract
The purpose of this experiment was to study the effects of adding organic trace minerals in the diet on the production performance, serum immunity, antioxidant performance, apparent digestibility of nutrients and rumen fermentation parameters of lactating cows.In this experiment, 60 Holstein cows with similar body conditions were randomly divided into 3 groups with 20 cows in each group. They were ① in⁃ organic trace mineral source diet group (ITM), basic diet+100% inorganic sulfate Cu, Mn, Zn (5.07 mg/kg Cu, 6.94 mg/kg Mn and 33.75 mg/kg Zn respectively for the diet); ② organic trace mineral salt source diet group Ⅰ (OTM1), basic diet + 50% inorganic sulfate Cu, Mn, Zn (2.54 mg/kg Cu, 3.47 mg/kg Mn and 16.88 mg/kg Zn respectively for the diet) +50% hydroxymethionine chelated Cu, Mn, Zn (2.54 mg/kg Cu, 3.47 mg/kg Mn and 16.88 mg/kg Zn respectively for the diet); ③ organic trace mineral salt source diet group Ⅱ (OTM2), basic diet +50% inorganic sulfate Cu, Mn, Zn (2.54 mg/kg Cu, 3.47 mg/kg Mn and 16.88 mg/kg Zn respectively for the diet)+50% hydrolyzed protein Cu, Mn, Zn (2.54 mg/kg Cu, 3.47 mg/kg Mn and 16.88 mg/kg Zn respectively for the diet). The test was conducted for 3 months. Cow feed, milk sample, blood, rumen fluid and feces were collected, and the relevant indicators such as routine nutrient composition, apparent digestibility, serum antioxidant and immunity, and compare the effects of organic and inorganic forms of Cu, Mn, Zn on the production performance of lactating cows were analyzed and calculated. The results of this experiment showed that there was no significant difference in milk yield and feed intake among the treatment groups (P>0.05); The number of milk somatic cells in OTM1 and OTM2 was significantly lower than that in ITM (P<0.05); The substitution of organic trace minerals for inorganic trace minerals had no significant effect on rumen fermentation performance of each treatment group (P>0.05); The serum IgG level of OTM1 and OTM2 at 30 days was significantly higher than that of ITM (P<0.05), the IgM level of OTM2 at 60 days was significantly higher than that of OTM1 and ITM (P<0.05), and the IgM level of OTM1 was significantly higher than that of ITM (P<0.05), and the IgM level of ITM at 90 days and 0-90 days was significantly lower than that of OTM1 and OTM2 (P<0.05). OTM1 has better economic benefits, which is 1.72 yuan/(d·head) and 1.43 yuan/(d·head) higher than those of OTM2 and ITM, respectively. Replacing inorganic minerals with organic minerals can significantly reduce the number of somatic cells in dairy cows, improve the anti-oxidation ability and immune ability of serum, and thus improve the health of lactating cows.
- Publication
Feed Industry, 2023, Vol 44, Issue 13, p77
- ISSN
1001-991X
- Publication type
Article
- DOI
10.13302/j.cnki.fi.2023.13.011