Effects of Calcium Formate and Calcium Lactate on Performance, Milk Composition, Blood Biochemical Indices, Calcium and Phosphorus Metabolism of Lactating Dairy Cows

ZHANG Shu, LU Na, WANG Yajing, SHAO Wei, LI Shengli, MU Zhishen

doi:10.3969/j.issn.1006-267x.2018.10.019

2018 , Vol. 30 >Issue 10: 3950 - 3957

DOI: https://doi.org/10.3969/j.issn.1006-267x.2018.10.019

Molecular Nutrition

Effects of Calcium Formate and Calcium Lactate on Performance, Milk Composition, Blood Biochemical Indices, Calcium and Phosphorus Metabolism of Lactating Dairy Cows

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1. College of Animal Science and Technology, Xinjiang Agricultural University, Urumqi 830052, China;
2. State Key Laboratory of Animal Nutrition, Beijing Engineering Technology Research Center of Raw Milk Quality and Safety Control, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China;
3. Inner Mongoliamengniu Dairy(Group) Co., Ltd., Hohhot 011500, China

Received date: 2018-03-26

Online published: 2018-10-20

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Abstract

This experiment was conducted to investigate the effects of calcium formate and calcium lactate on performance, milk composition, blood biochemical indices, calcium and phosphorus metabolism of lactating dairy cows. Forty-five Holstein lactating dairy cows with similar milk yield, parity, milk composition and lactation days were randomly assigned into 3 groups with 15 replicates in each group and 1 cow in each replicate. Cows in the control group were fed a basal diet, and others in trial group Ⅰ and trial group Ⅱ were fed the experimental diets in which 50% limestone was replaced by calcium formate and calcium formate+calcium lactate, and had the same dietary calcium level in the 3 groups. The pre-trial lasted for 10 days, and the trial period lasted for 60 days. The results showed as follows:1) compared with the control group, the milk protein rate of trial group Ⅰ and trial group Ⅱ was significantly increased (P<0.05), the milk fat rate and milk calcium content were increased, but the difference was not significant (P<0.05). There were no significant differences in dry matter intake, milk yield, lactose rate and milk phosphorus content among all groups (P>0.05). 2) The plasma osteocalcin (OC) content of trial group Ⅰ and trial group Ⅱ was significantly higher than that of the control group (P<0.05). There were no significant differences in the parathormone (PTH), calcium and phosphorus contents and alkaline phosphatase activity in serum, and plasma bone resorption (CTX) content among all groups (P>0.05). 3) The calcium and phosphorus apparent digestibilities of trial group Ⅰ and trial group Ⅱ were significantly higher than those of the control group (P<0.05), calcium and phosphorus balance were significantly higher than those of the control group (P<0.05), and the contents of calcium and phosphorus in faeces were significantly lower than those of the control group (P<0.05). In conclusion, part limestone replaced by calcium formate and calcium lactate can significantly improve the milk protein rate of lactating dairy cows, improve the milk fat rate and milk calcium content, significantly increase the calcium and phosphorus apparent digestibilities, and reduce the calcium and phosphorus emissions.

Key words： calcium formate; calcium lactate; lactating dairy cows; calcium and phosphorus metabolism

Cite this article

ZHANG Shu, LU Na, WANG Yajing, SHAO Wei, LI Shengli, MU Zhishen . Effects of Calcium Formate and Calcium Lactate on Performance, Milk Composition, Blood Biochemical Indices, Calcium and Phosphorus Metabolism of Lactating Dairy Cows[J]. Chinese Journal of Animal Nutrition, 2018 , 30(10) : 3950 -3957 . DOI: 10.3969/j.issn.1006-267x.2018.10.019

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