Effects of Compound Buffers on Milk Composition, Biochemical Parameters and Hormone Contents in Plasma of Lactating Goats

LI Jiaying, ZHUANG Su, FAN Chengrui, WANG Yuyu, WANG Baozhe, LIU Qiang

doi:10.3969/j.issn.1006-267x.2017.07.023

2017 , Vol. 29 >Issue 7: 2399 - 2406

DOI: https://doi.org/10.3969/j.issn.1006-267x.2017.07.023

Molecular Nutrition

Effects of Compound Buffers on Milk Composition, Biochemical Parameters and Hormone Contents in Plasma of Lactating Goats

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College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China

Received date: 2017-01-01

Online published: 2017-07-05

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Abstract

The aim of this study was to investigate the effects of compound buffers (consisted of sodium bicarbonate, magnesium oxide and sodium butyrate) on milk composition, biochemical parameters and hormone contents in plasma of lactating goats fed high concentrate diet for long term. Eight mid-lactating goats with portal and hepatic vein catheters were randomly divided into two groups to feed a basal diet (high concentrate diet group, HG group) or the basal diet added with compound buffers (high concentrate diet + compound buffers group, BG group). The pretest lasted for 7 d, and the test lasted for 143 d. The results showed as follows: compared with HG group, compound buffers significantly increased the mean of rumen fluid pH at 0 to 10 h after feeding (P<0.05); compound buffers significantly increased plasma non-estesterified fatty acid content in hepatic vein (P<0.05), but had no significant effects on plasma contents of glucose and β-hydroxybutyrate in portal and hepatic veins (P>0.05), and had no significant effects on triglyceride and total protein contents in liver tissue (P>0.05); compound buffers significantly decreased plasma insulin and glucagon contents in portal vein (P<0.05), but had no significant effects on plasma insulin-like growth factor 1 and growth hormone contents in portal and hepatic veins (P>0.05); compound buffers significantly increased milk yield, milk fat percentage, milk protein percentage and milk solid not-fat percentage (P<0.05 or P<0.01). The results suggest that adding compound buffers consisted of sodium bicarbonate, magnesium oxide and sodium butyrate affects the metabolism of nutrients through changing plasma biochemical parameters and hormone contents, and increases milk yield and improves milk quality of dairy goats fed high concentrate diet for long term.

Key words： compound buffers; high concentrate; dairy goat; milk quality; insulin

Cite this article

LI Jiaying, ZHUANG Su, FAN Chengrui, WANG Yuyu, WANG Baozhe, LIU Qiang . Effects of Compound Buffers on Milk Composition, Biochemical Parameters and Hormone Contents in Plasma of Lactating Goats[J]. Chinese Journal of Animal Nutrition, 2017 , 29(7) : 2399 -2406 . DOI: 10.3969/j.issn.1006-267x.2017.07.023

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