Effects of Dietary Phosphorus Level on Lactation Performance and Serum Indices of Laoshan Dairy Goats

WANG Huimin; ZHU Fenghua; GE Wei; CAO Yufang; CHENG Ming; LIN Yingting

doi:10.3969/j.issn.1006-267x.2017.01.039

Chinese Journal of Animal Nutrition >

2017 , Vol. 29 >Issue 1: 339 - 346

DOI: https://doi.org/10.3969/j.issn.1006-267x.2017.01.039

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Effects of Dietary Phosphorus Level on Lactation Performance and Serum Indices of Laoshan Dairy Goats

WANG Huimin ,
ZHU Fenghua ,
GE Wei ,
CAO Yufang ,
CHENG Ming ,
LIN Yingting

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1. College of Animal Science and Technology, Qingdao Agricultural University, Qingdao 266109, China;
2. Institute of Husbandry and Veterinary of Qingdao, Qingdao 266109, China

Received date: 2016-08-01

Online published: 2017-01-16

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Abstract

This experiment was conducted to determine the effects of dietary phosphorus level on lactation performance and serum biochemical indices of Laoshan dairy goats. Thirty 2-parities Laoshan dairy goats in mid-lactation with average weight of (56.55±1.17) kg and milk yield of (2.20±0.07) kg/d were used by single-factor randomized design and equally divided into 3 groups with 10 goats per group and one goat per replicate. Three groups were fed diets with consistent energy and protein level, but different phosphorus levels (0.26%, 0.36% and 0.46%, respectively). The pre-experiment lasted for 15 d, and the formal experiment lasted for 60 d. The results showed as follows:1) dietary phosphorus level had no significant effect on dry matter intake (P>0.05). 2) 0.36% group had higher average milk yield, which was significantly higher than that in 0.26% group and 0.46% group (P<0.01), and there was no significant difference between 0.26% group and 0.46% group (P>0.05); dry matter intake/milk yield and dry matter intake/4% fat corrected milk in 0.36% group were lower, and were significantly lower than those in 0.46% group (P<0.01). 3) Dietary phosphorus level had no significant effects on milk fat percentage, milk protein percentage, lactose percentage, milk non-fat solids percentage, milk phosphorus content, milk calcium content (P>0.05). 4) Dietary phosphorus level had no significant effects on serum calcium, phosphorus and urea nitrogen contents, and alkaline phosphatase activitiy of Laoshan dairy goats (P>0.05). Thus, the suitable phosphorus level for lactating Laoshan dairy goats is 0.36%.

Key words： Laoshan dairy goats; phosphorus level; lactation performance; serum biochemical indices

Cite this article

WANG Huimin , ZHU Fenghua , GE Wei , CAO Yufang , CHENG Ming , LIN Yingting . Effects of Dietary Phosphorus Level on Lactation Performance and Serum Indices of Laoshan Dairy Goats[J]. Chinese Journal of Animal Nutrition, 2017 , 29(1) : 339 -346 . DOI: 10.3969/j.issn.1006-267x.2017.01.039

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