Effects of Ammonium Chloride on Performance, Serum and Urine Metabolism of Lactating Cows

WANG Kun; ZHAO Puyi; LIU Wei; BU Dengpan; LIU Shijie; ZHANG Kaizhan

doi:10.3969/j.issn.1006-267x.2016.05.015

Chinese Journal of Animal Nutrition >

2016 , Vol. 28 >Issue 5: 1394 - 1401

DOI: https://doi.org/10.3969/j.issn.1006-267x.2016.05.015

RUMINANT NUTRITION

Effects of Ammonium Chloride on Performance, Serum and Urine Metabolism of Lactating Cows

WANG Kun ,
ZHAO Puyi ,
LIU Wei ,
BU Dengpan ,
LIU Shijie ,
ZHANG Kaizhan

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1. State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China;
2. CAAS-ICRAF Joint Laboratory on Agroforestry and Sustainable Animal Husbandry, Beijing 100081, China;
3. Synergetic Innovation Center of Food Safety and Nutrition, Harbin 150030, China;
4. China Feed Industry Association, Beijing 100125, China;
5. Beijing Sino Farm Co., Ltd., Beijing 100128, China

Received date: 2015-12-17

Online published: 2016-05-24

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Abstract

The present study evaluated the effects of ammonium chloride on performance, serum and urine metabolism of lactating cows to determine the optimal supplemental level for lactating dairy cows. Forty-eight Holstein dairy cows, similarly in days in milk, body weight, milk yield and parity, were randomly assigned to 1 of 4 groups with 12 cows according to a completely randomized design. The supplemental level of ammonium chloride was 0(control), 150, 300 and 450 g/d, respectively. The pre-trial lasted for 14 days and the trial lasted 56 days. The results showed as follows:1) dry matter intake (P=0.012) and milk yield (P=0.008) decreased linearly as the supplemental level of ammonium chloride increased, and 300 and 450 g/d groups were significantly lower than control group (P<0.05); no significant effects were observed on milk fat percentage and lactose percentage (P>0.05), while milk protein percentage tended to be linearly increased (P=0.094). 2) Urine pH decreased quadratically as ammonium chloride supplemental level increased (P=0.012), and 300 and 450 g/d groups were significantly lower than control group (P<0.05); the concentrations of serum Cl^- (P=0.002) and urine Cl^- (P=0.004), Ca²⁺ (P<0.001), P⁵⁺ (P=0.017) and Mg²⁺ (P=0.048) increased linearly as the supplemental level of ammonium chloride increased. 3) Serum urea concentration increased linearly as ammonium chloride supplemental level increased (P=0.018), and 300 and 450 g/d groups were significantly higher than control group (P<0.05). In conclusion, ammonium chloride supplemental level of lactating dairy cows should not exceed 300 g/d, and a more appropriate supplemental level is 150 g/d.

Key words： lactating cow; ammonium chloride; performance; serum and urine metabolism

Cite this article

WANG Kun , ZHAO Puyi , LIU Wei , BU Dengpan , LIU Shijie , ZHANG Kaizhan . Effects of Ammonium Chloride on Performance, Serum and Urine Metabolism of Lactating Cows[J]. Chinese Journal of Animal Nutrition, 2016 , 28(5) : 1394 -1401 . DOI: 10.3969/j.issn.1006-267x.2016.05.015

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