Journal of Animal Production, Print ISSN: 2008-6776., Online ISSN: 2382-994X

Effect of dietary supplementation of Condensed Molasses Soluble (Vinasse) on milk yield and apparent nutrient digestibility in lactating Holstein cows under heat stress

Document Type : Research Paper

Authors

Amin Rahimi 1
Farhang Fatehi 2
Abolfazl Zali 3

1 Department of Animal Sciences, College of Agriculture & Natural Resources, University of Tehran, Karaj, Iran. PC:+983158777871

2 Assistant Professor, Department of Animal Science, Faculty of Agricultural Science and Engineering, College of Agricultural and Natural Resources, University of Tehran, Karaj, Iran

3 Associate Professor, Department of Animal Science, Faculty of agricultural science and engineering, College of Agricultural and Natural Resources, University of Tehran, Karaj, Iran. PC: +983158777871

https://doi.org/10.22059/jap.2021.294714.623487
Abstract
The current study was conducted to investigate the effect of dietary supplementing of condensed molasses soluble (Vinasse) in heat stressed mid-lactating Holstein cows on milk yield and composition, apparent nutrient digestibility and economical parameters. The experiment was performed by 84 Holstein lactating dairy cows (DIM: 155±25; MY: 32±3) in a completely randomized design with three treatments 1) basal diet without vinous (control), 2) diet containing 5% of vinasse (2.2 kg/head/day) and 3) diet containing 10% 0f vinasse (4.4 kg/head/day). The study was conducted in the summer season with a temperature -humidity index of 75.1. The experiment lasted for 25 days (15 days for adaptation and 10 days for sampling). Dry matter intake of the treatment fed a 10% vinasse supplemented diet was higher than the other treatments (P<0.05). Dry matter and NDF digestibility coefficients were increased by increasing the level of vinasse in the diets, compared to the control (P<0.05). The economical index of income over feed cost was the highest for the diet containing 5% of vinasse. Totally, regarding to the chemical composition of the vinasse and its beneficial impacts on the performance of the cows under heat stress, using 5% of dry matter vinasse supplementation (2.2 kg wet weight/day or 1.1 kg dry matter/day) can improve nutrient digestibility and reduce feed costs without any adverse effects on dry matter intake.

Keywords

Economical indices
Heat stress
Mid-lactating cows
Milk yield and components
Vinasse
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Journal of Animal Production, Print ISSN: 2008-6776., Online ISSN: 2382-994X
Volume 23, Issue 3
Summer 2021
Pages 375-385

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