Milk production, grazing behavior and nutritional status of dairy cows grazing two herbage allowances during winter

Winter grazing provides a useful means for increasing the proportion of grazed herbage in the annual diet of dairy cows. This season is characterized by low herbage growth rate, low herbage allowance, and low herbage intake and hence greater needs for supplements to supply the requirements of lactat...

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Autores principales:	Ruiz-Albarran,Miguel, Balocchi,Oscar, Wittwer,Fernando, Pulido,Rubén
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2016
Materias:	Dairy grazing behavior nutritional status winter grazing
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392016000100005
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spelling	oai:scielo:S0718-583920160001000052018-10-01Milk production, grazing behavior and nutritional status of dairy cows grazing two herbage allowances during winterRuiz-Albarran,MiguelBalocchi,OscarWittwer,FernandoPulido,Rubén Dairy grazing behavior nutritional status winter grazing Winter grazing provides a useful means for increasing the proportion of grazed herbage in the annual diet of dairy cows. This season is characterized by low herbage growth rate, low herbage allowance, and low herbage intake and hence greater needs for supplements to supply the requirements of lactating dairy cows. The aim of this study was to determine the influence of herbage allowance (HA) offered to autumn calving dairy cows grazing winter herbage on milk production, nutritional status, and grazing behavior. The study took 63 d using 32 multiparous Holstein-Friesian dairy cows. Prior to experimental treatment, milk production averaged 20.2 ± 1.7 kg d-1, body weight was 503 ± 19 kg, and days in milking were 103 ± 6. Experimental animals were randomly assigned to two treatments according to HA offered above ground level: low (17 kg DM cow-1 d-1) vs. high HA (25 kg DM cow¹ d¹). All cows were supplemented with grass silage supplying daily 6.25 and 4.6 kg DM of concentrate (concentrate commercial plus high corn moisture). Decreasing HA influenced positively milk production (+25%), milk protein (+20 kg), and milk fat (+17 kg) per hectare; however no effects on milk production per cow or energy metabolic status were observed in the cows. In conclusion, a low HA showed to be the most significant influencing factor on milk and milk solids production per hectare in dairy cows grazing restricted winter and supplemented with grass silage and concentrate; but no effect on the milk production per cow was found.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.76 n.1 20162016-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392016000100005en10.4067/S0718-58392016000100005
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Dairy grazing behavior nutritional status winter grazing
spellingShingle	Dairy grazing behavior nutritional status winter grazing Ruiz-Albarran,Miguel Balocchi,Oscar Wittwer,Fernando Pulido,Rubén Milk production, grazing behavior and nutritional status of dairy cows grazing two herbage allowances during winter
description	Winter grazing provides a useful means for increasing the proportion of grazed herbage in the annual diet of dairy cows. This season is characterized by low herbage growth rate, low herbage allowance, and low herbage intake and hence greater needs for supplements to supply the requirements of lactating dairy cows. The aim of this study was to determine the influence of herbage allowance (HA) offered to autumn calving dairy cows grazing winter herbage on milk production, nutritional status, and grazing behavior. The study took 63 d using 32 multiparous Holstein-Friesian dairy cows. Prior to experimental treatment, milk production averaged 20.2 ± 1.7 kg d-1, body weight was 503 ± 19 kg, and days in milking were 103 ± 6. Experimental animals were randomly assigned to two treatments according to HA offered above ground level: low (17 kg DM cow-1 d-1) vs. high HA (25 kg DM cow¹ d¹). All cows were supplemented with grass silage supplying daily 6.25 and 4.6 kg DM of concentrate (concentrate commercial plus high corn moisture). Decreasing HA influenced positively milk production (+25%), milk protein (+20 kg), and milk fat (+17 kg) per hectare; however no effects on milk production per cow or energy metabolic status were observed in the cows. In conclusion, a low HA showed to be the most significant influencing factor on milk and milk solids production per hectare in dairy cows grazing restricted winter and supplemented with grass silage and concentrate; but no effect on the milk production per cow was found.
author	Ruiz-Albarran,Miguel Balocchi,Oscar Wittwer,Fernando Pulido,Rubén
author_facet	Ruiz-Albarran,Miguel Balocchi,Oscar Wittwer,Fernando Pulido,Rubén
author_sort	Ruiz-Albarran,Miguel
title	Milk production, grazing behavior and nutritional status of dairy cows grazing two herbage allowances during winter
title_short	Milk production, grazing behavior and nutritional status of dairy cows grazing two herbage allowances during winter
title_full	Milk production, grazing behavior and nutritional status of dairy cows grazing two herbage allowances during winter
title_fullStr	Milk production, grazing behavior and nutritional status of dairy cows grazing two herbage allowances during winter
title_full_unstemmed	Milk production, grazing behavior and nutritional status of dairy cows grazing two herbage allowances during winter
title_sort	milk production, grazing behavior and nutritional status of dairy cows grazing two herbage allowances during winter
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2016
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392016000100005
work_keys_str_mv	AT ruizalbarranmiguel milkproductiongrazingbehaviorandnutritionalstatusofdairycowsgrazingtwoherbageallowancesduringwinter AT balocchioscar milkproductiongrazingbehaviorandnutritionalstatusofdairycowsgrazingtwoherbageallowancesduringwinter AT wittwerfernando milkproductiongrazingbehaviorandnutritionalstatusofdairycowsgrazingtwoherbageallowancesduringwinter AT pulidoruben milkproductiongrazingbehaviorandnutritionalstatusofdairycowsgrazingtwoherbageallowancesduringwinter
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Milk production, grazing behavior and nutritional status of dairy cows grazing two herbage allowances during winter

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