Effects of different amounts of crude glycerol supplementation on dry matter intake, milk yield, and milk quality of lactating dairy cows grazing on a Kikuyu grass pasture

The aim of this study was to determine the effects of different amounts of crude glycerol (CGL) on dry matter intake, milk yield, milk protein yield, and milk fatty acid profile of dairy cows grazing on a Kikuyu-based pasture. Six Holstein cows were used in the first third of lactation (mean ± SD 55...

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Autores principales:	Diana Marcela Valencia E, Luis Alfonso Giraldo, Alejandra Marin, Yury Tatiana Granja Salcedo, Telma Teresinha Berchielli
Formato:	article
Lenguaje:	EN ES PT
Publicado:	Universidad Nacional de Trujillo 2021
Materias:	biofuels energy by-products energy feedstuff lactation performance milk composition tropical pasture Agriculture S Agriculture (General) S1-972
Acceso en línea:	https://doaj.org/article/71ddbf3f23fc467385b53d1563596634
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spelling	oai:doaj.org-article:71ddbf3f23fc467385b53d15635966342021-11-04T14:38:07ZEffects of different amounts of crude glycerol supplementation on dry matter intake, milk yield, and milk quality of lactating dairy cows grazing on a Kikuyu grass pasture10.17268/sci.agropecu.2021.0532077-99172306-6741https://doaj.org/article/71ddbf3f23fc467385b53d15635966342021-12-01T00:00:00Zhttps://revistas.unitru.edu.pe/index.php/scientiaagrop/article/view/3538https://doaj.org/toc/2077-9917https://doaj.org/toc/2306-6741The aim of this study was to determine the effects of different amounts of crude glycerol (CGL) on dry matter intake, milk yield, milk protein yield, and milk fatty acid profile of dairy cows grazing on a Kikuyu-based pasture. Six Holstein cows were used in the first third of lactation (mean ± SD 559 ± 22.5 kg body weight, 43 ± 10 days in milk, and 26.8 ± 1.2 kg milk/day) and were randomized within a replicated 3 × 3 Latin square arrangement. Animals grazed the Kikuyu grass and were supplemented with a commercial energy-protein concentrate at 1.0 kg/4.0 kg of milk. The experimental period was 69 days. The following treatments were administered: CGL0 (control, without glycerol), CGL1 (750 g/cow/day), and CGL2 (1,500 g/cow/day). The addition of 750 and 1,500 g of CGL did not affect grass and concentrate intake (P > 0.05). However, milk yield (FCM 3.5%) increased by 14.2% in the CGL2 group compared to that obtained in the control group (CGL0) (P = 0.02). The addition of 1,500 g of CGL to the diet resulted in a 2.1% greater yield of milk protein compared to that obtained with CGL0 treatment (P = 0.01). Further, the addition of 1,500 g of CGL did not impact grass intake, milk fat concentration, or fatty acid composition (P < 0.05). Thus, the inclusion of CGL as a co-product may be a nutritional strategy to increase the productivity of dairy production systems in tropical perennials, such as Kikuyu grass.Diana Marcela Valencia ELuis Alfonso GiraldoAlejandra MarinYury Tatiana Granja SalcedoTelma Teresinha BerchielliUniversidad Nacional de Trujilloarticlebiofuelsenergy by-productsenergy feedstufflactation performancemilk compositiontropical pastureAgricultureSAgriculture (General)S1-972ENESPTScientia Agropecuaria, Vol 12, Iss 4, Pp 491-497 (2021)
institution	DOAJ
collection	DOAJ
language	EN ES PT
topic	biofuels energy by-products energy feedstuff lactation performance milk composition tropical pasture Agriculture S Agriculture (General) S1-972
spellingShingle	biofuels energy by-products energy feedstuff lactation performance milk composition tropical pasture Agriculture S Agriculture (General) S1-972 Diana Marcela Valencia E Luis Alfonso Giraldo Alejandra Marin Yury Tatiana Granja Salcedo Telma Teresinha Berchielli Effects of different amounts of crude glycerol supplementation on dry matter intake, milk yield, and milk quality of lactating dairy cows grazing on a Kikuyu grass pasture
description	The aim of this study was to determine the effects of different amounts of crude glycerol (CGL) on dry matter intake, milk yield, milk protein yield, and milk fatty acid profile of dairy cows grazing on a Kikuyu-based pasture. Six Holstein cows were used in the first third of lactation (mean ± SD 559 ± 22.5 kg body weight, 43 ± 10 days in milk, and 26.8 ± 1.2 kg milk/day) and were randomized within a replicated 3 × 3 Latin square arrangement. Animals grazed the Kikuyu grass and were supplemented with a commercial energy-protein concentrate at 1.0 kg/4.0 kg of milk. The experimental period was 69 days. The following treatments were administered: CGL0 (control, without glycerol), CGL1 (750 g/cow/day), and CGL2 (1,500 g/cow/day). The addition of 750 and 1,500 g of CGL did not affect grass and concentrate intake (P > 0.05). However, milk yield (FCM 3.5%) increased by 14.2% in the CGL2 group compared to that obtained in the control group (CGL0) (P = 0.02). The addition of 1,500 g of CGL to the diet resulted in a 2.1% greater yield of milk protein compared to that obtained with CGL0 treatment (P = 0.01). Further, the addition of 1,500 g of CGL did not impact grass intake, milk fat concentration, or fatty acid composition (P < 0.05). Thus, the inclusion of CGL as a co-product may be a nutritional strategy to increase the productivity of dairy production systems in tropical perennials, such as Kikuyu grass.
format	article
author	Diana Marcela Valencia E Luis Alfonso Giraldo Alejandra Marin Yury Tatiana Granja Salcedo Telma Teresinha Berchielli
author_facet	Diana Marcela Valencia E Luis Alfonso Giraldo Alejandra Marin Yury Tatiana Granja Salcedo Telma Teresinha Berchielli
author_sort	Diana Marcela Valencia E
title	Effects of different amounts of crude glycerol supplementation on dry matter intake, milk yield, and milk quality of lactating dairy cows grazing on a Kikuyu grass pasture
title_short	Effects of different amounts of crude glycerol supplementation on dry matter intake, milk yield, and milk quality of lactating dairy cows grazing on a Kikuyu grass pasture
title_full	Effects of different amounts of crude glycerol supplementation on dry matter intake, milk yield, and milk quality of lactating dairy cows grazing on a Kikuyu grass pasture
title_fullStr	Effects of different amounts of crude glycerol supplementation on dry matter intake, milk yield, and milk quality of lactating dairy cows grazing on a Kikuyu grass pasture
title_full_unstemmed	Effects of different amounts of crude glycerol supplementation on dry matter intake, milk yield, and milk quality of lactating dairy cows grazing on a Kikuyu grass pasture
title_sort	effects of different amounts of crude glycerol supplementation on dry matter intake, milk yield, and milk quality of lactating dairy cows grazing on a kikuyu grass pasture
publisher	Universidad Nacional de Trujillo
publishDate	2021
url	https://doaj.org/article/71ddbf3f23fc467385b53d1563596634
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Effects of different amounts of crude glycerol supplementation on dry matter intake, milk yield, and milk quality of lactating dairy cows grazing on a Kikuyu grass pasture

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