Effect of supplementation with cracked wheat or high moisture corn on milk fatty acid composition of grazing dairy cows

ABSTRACT In Chile, high moisture corn (Zea mays L. [HMC]) has been included mainly in diets for grazing dairy cows on pastures with high crude protein, and is an alternative that improves nutrients supply and rumen synchrony between energy and protein provided by the diet. In addition, supplementati...

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Autores principales:	Rojas-Garduño,María de los Ángeles, Balocchi,Oscar, Vicente,Fernando, Pulido,Rubén
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2018
Materias:	Conjugated linoleic acid herbage allowance high moisture corn Triticum aestivum cracked wheat Zea mays
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392018000100096
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spelling	oai:scielo:S0718-583920180001000962018-04-25Effect of supplementation with cracked wheat or high moisture corn on milk fatty acid composition of grazing dairy cowsRojas-Garduño,María de los ÁngelesBalocchi,OscarVicente,FernandoPulido,Rubén Conjugated linoleic acid herbage allowance high moisture corn Triticum aestivum cracked wheat Zea mays ABSTRACT In Chile, high moisture corn (Zea mays L. [HMC]) has been included mainly in diets for grazing dairy cows on pastures with high crude protein, and is an alternative that improves nutrients supply and rumen synchrony between energy and protein provided by the diet. In addition, supplementation with HMC results in an increase of fatty acids (FA) in milk, desirable for human health. The aim of this study was to evaluate the effect of herbage allowance (HA) and type of supplement on milk FA composition in grazing dairy cows during spring. Thirty-two multiparous Holstein-Friesian dairy cows (533 ± 71 kg BW; 53 ± 4 d in milk [DIM[ and milk yield 23.8 ± 4.2 kg d-1) were randomly assigned to four dietary treatments resulting from the combination of two HA levels (low 20 vs. moderate 30 kg DM cow1 d-1) and two types of supplements HMC and cracked wheat [Triticum aestivum L., CW]) offered at 3.5 kg DM cow-1 d-1. Total FA intake was greater for moderate HA (547.8 g d-1) than low HA (527.2 g d-1) (P < 0.05); but did not affect milk yield, milk constituents and milk FA composition (P > 0.05). Supplementation with HMC increased milk production by 2.3 kg d-1 compared with CW. Cows supplemented with HMC showed a greater intake of total FA (564 g d-1) and had greater concentrations of long-chain monounsaturated FA in milk (27.13 g 100 g-1) compared to cows supplemented with CW (511.0 g d-1 total FA intake and 25.39 g 100 g-1 in milk, respectively) (P < 0.05). It is concluded that grazing dairy cows supplemented with HMC during spring produced milk with higher concentrations of desirable FA, independently of the HA level.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.78 n.1 20182018-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392018000100096en10.4067/S0718-58392018000100096
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Conjugated linoleic acid herbage allowance high moisture corn Triticum aestivum cracked wheat Zea mays
spellingShingle	Conjugated linoleic acid herbage allowance high moisture corn Triticum aestivum cracked wheat Zea mays Rojas-Garduño,María de los Ángeles Balocchi,Oscar Vicente,Fernando Pulido,Rubén Effect of supplementation with cracked wheat or high moisture corn on milk fatty acid composition of grazing dairy cows
description	ABSTRACT In Chile, high moisture corn (Zea mays L. [HMC]) has been included mainly in diets for grazing dairy cows on pastures with high crude protein, and is an alternative that improves nutrients supply and rumen synchrony between energy and protein provided by the diet. In addition, supplementation with HMC results in an increase of fatty acids (FA) in milk, desirable for human health. The aim of this study was to evaluate the effect of herbage allowance (HA) and type of supplement on milk FA composition in grazing dairy cows during spring. Thirty-two multiparous Holstein-Friesian dairy cows (533 ± 71 kg BW; 53 ± 4 d in milk [DIM[ and milk yield 23.8 ± 4.2 kg d-1) were randomly assigned to four dietary treatments resulting from the combination of two HA levels (low 20 vs. moderate 30 kg DM cow1 d-1) and two types of supplements HMC and cracked wheat [Triticum aestivum L., CW]) offered at 3.5 kg DM cow-1 d-1. Total FA intake was greater for moderate HA (547.8 g d-1) than low HA (527.2 g d-1) (P < 0.05); but did not affect milk yield, milk constituents and milk FA composition (P > 0.05). Supplementation with HMC increased milk production by 2.3 kg d-1 compared with CW. Cows supplemented with HMC showed a greater intake of total FA (564 g d-1) and had greater concentrations of long-chain monounsaturated FA in milk (27.13 g 100 g-1) compared to cows supplemented with CW (511.0 g d-1 total FA intake and 25.39 g 100 g-1 in milk, respectively) (P < 0.05). It is concluded that grazing dairy cows supplemented with HMC during spring produced milk with higher concentrations of desirable FA, independently of the HA level.
author	Rojas-Garduño,María de los Ángeles Balocchi,Oscar Vicente,Fernando Pulido,Rubén
author_facet	Rojas-Garduño,María de los Ángeles Balocchi,Oscar Vicente,Fernando Pulido,Rubén
author_sort	Rojas-Garduño,María de los Ángeles
title	Effect of supplementation with cracked wheat or high moisture corn on milk fatty acid composition of grazing dairy cows
title_short	Effect of supplementation with cracked wheat or high moisture corn on milk fatty acid composition of grazing dairy cows
title_full	Effect of supplementation with cracked wheat or high moisture corn on milk fatty acid composition of grazing dairy cows
title_fullStr	Effect of supplementation with cracked wheat or high moisture corn on milk fatty acid composition of grazing dairy cows
title_full_unstemmed	Effect of supplementation with cracked wheat or high moisture corn on milk fatty acid composition of grazing dairy cows
title_sort	effect of supplementation with cracked wheat or high moisture corn on milk fatty acid composition of grazing dairy cows
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2018
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392018000100096
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Effect of supplementation with cracked wheat or high moisture corn on milk fatty acid composition of grazing dairy cows

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