Effects of Dietary Phosphorus Level on Growth Performance, Serum Biochemical Indices and Phosphorus Excretion of Growing Laoshan Dairy Goats

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

doi:10.3969/j.issn.1006-267x.2017.07.039

2017 , Vol. 29 >Issue 7: 2541 - 2547

DOI: https://doi.org/10.3969/j.issn.1006-267x.2017.07.039

Molecular Nutrition

Effects of Dietary Phosphorus Level on Growth Performance, Serum Biochemical Indices and Phosphorus Excretion of Growing Laoshan Dairy Goats

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

Received date: 2017-01-01

Online published: 2017-07-05

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Abstract

This experiment was conducted to study the effects of dietary phosphorus level on growth performance, serum biochemical indices and phosphorus excretion of growing Laoshan dairy goats. Thirty growing Laoshan dairy goats (male) with an average body weight of (21.07±0.30) kg were used in a single-factor randomized design and equally divided into 3 groups with 10 replicates in each group and 1 goat per replicate. Goats were fed diets with consistent energy and protein, but different phosphorus levels (0.25%, 0.35% and 0.45%, respectively). The experiment lasted for 105 days consisted of a 15-day pre-experimental period and a 90-day experiment period. The results showed as follows: 1) dietary phosphorus level had no significant effect on dry matter intake of growing Laoshan dairy goats (P>0.05). Dietary phosphorus level had no significant effect on body weight of Laoshan dairy goats at 7, 8 and 9 months of age and average daily gain (P>0.05). 2) Dietary phosphorus level had no significant effect on serum calcium, phosphorus, urea nitrogen contents and alkaline phosphatase activity of growing Laoshan dairy goats (P>0.05). 3) For the phosphorus intake, feces phosphorus, urine phosphorus and total phosphorus excretion, which in 0.45% group were significantly higher than those in 0.25% group and 0.35% group (P<0.01), which in 0.35% group were significantly higher than those in 0.25% group (P<0.01). The results indicate that dietary phosphorus level has no significant effect on dry matter intake, body weight and serum biochemical indices of growing Laoshan dairy goats, but the phosphorus level of 0.25% can significantly reduces the feces phosphorus and urine phosphorus excretion, and then reduces environmental pollution. Under the conditions of this experiment, the suitable phosphorus level for growing Laoshan dairy goats is 0.25%.

Key words： growing period; Laoshan dairy goats; growth performance; serum biochemical indices; phosphorus excretion

Cite this article

WANG Huimin, ZHU Fenghua, GE Wei, CAO Yufang, CHENG Ming, LIN Yingting . Effects of Dietary Phosphorus Level on Growth Performance, Serum Biochemical Indices and Phosphorus Excretion of Growing Laoshan Dairy Goats[J]. Chinese Journal of Animal Nutrition, 2017 , 29(7) : 2541 -2547 . DOI: 10.3969/j.issn.1006-267x.2017.07.039

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