Effect of two concentrate levels at the beginning of lactation on milk production and reproductive efficiency

Effect of two concentrate levels at the beginning of lactation on milk production and reproductive efficiency

An experiment was conducted at the "Centro Nacional de Pesquisa de Gado de Leite"/EMBRAPA, utilizing 24 crossbred Holstein-Zebu cows, to test the following treatments: A) feeding regimen calculated to supply the maintenance requirements of crude protein (CP) and total digestible nutrients (TDN) of a 500 kg dairy cow plus 120% of the requirements of these nutrients for an estimated milk production of 12 kg/day during the first twelve weeks of lactation; B) feeding regimen calculated to supply the maintenance requirements of CP and TDN, plus 85% of the requirements of these nutrients for milk production during the same period of  lactation. After this period, all 24 cows were fed according to the National Research Council (1978) standards, to the end of lactation. Milk production was higher (P < 0.05) and weight loss was lower (P < 0.01) in treatment A than in treatment B, during the first twelve weeks of lactation. There were no differences in production or composition of milk from day 85th to the end of lactation period. The interval from parturition to first ovulation was higher (P < 0.05) and the calving interval shorter (P < 0.05) in treatment A than in treatment B. Crossbred dairy cows should be fed according to National Research Council (1978) standards.

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Main Authors: Paiva, João Alberto de Jesus, Cruz, Geraldo Maria da, Carvalho, Mauro Ribeiro de, Neto, José Lobato, Moreira, Homero Abílio
Format: Digital revista
Language:por
Published: Pesquisa Agropecuaria Brasileira 2014
Online Access:https://seer.sct.embrapa.br/index.php/pab/article/view/14662
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spelling rev-pab-br-article-146622014-10-16T20:05:34Z Effect of two concentrate levels at the beginning of lactation on milk production and reproductive efficiency Efeito de dois níveis de concentrado no período inicial da lactação sobre a produção de leite e a eficiência reprodutiva Paiva, João Alberto de Jesus Cruz, Geraldo Maria da Carvalho, Mauro Ribeiro de Neto, José Lobato Moreira, Homero Abílio crossbred dairy cows; nutritional requirements; number of service required per conception; calving interval mestiças; requisitos nutricionais; número de serviços por concepção; intervalo entre partos An experiment was conducted at the "Centro Nacional de Pesquisa de Gado de Leite"/EMBRAPA, utilizing 24 crossbred Holstein-Zebu cows, to test the following treatments: A) feeding regimen calculated to supply the maintenance requirements of crude protein (CP) and total digestible nutrients (TDN) of a 500 kg dairy cow plus 120% of the requirements of these nutrients for an estimated milk production of 12 kg/day during the first twelve weeks of lactation; B) feeding regimen calculated to supply the maintenance requirements of CP and TDN, plus 85% of the requirements of these nutrients for milk production during the same period of  lactation. After this period, all 24 cows were fed according to the National Research Council (1978) standards, to the end of lactation. Milk production was higher (P < 0.05) and weight loss was lower (P < 0.01) in treatment A than in treatment B, during the first twelve weeks of lactation. There were no differences in production or composition of milk from day 85th to the end of lactation period. The interval from parturition to first ovulation was higher (P < 0.05) and the calving interval shorter (P < 0.05) in treatment A than in treatment B. Crossbred dairy cows should be fed according to National Research Council (1978) standards. An experiment was conducted at the "Centro Nacional de Pesquisa de Gado de Leite"/EMBRAPA, utilizing 24 crossbred Holstein-Zebu cows, to test the following treatments: A) feeding regimen calculated to supply the maintenance requirements of crude protein (CP) and total digestible nutrients (TDN) of a 500 kg dairy cow plus 120% of the requirements of these nutrients for an estimated milk production of 12 kg/day during the first twelve weeks of lactation; B) feeding regimen calculated to supply the maintenance requirements of CP and TDN, plus 85% of the requirements of these nutrients for milk production during the same period of  lactation. After this period, all 24 cows were fed according to the National Research Council (1978) standards, to the end of lactation. Milk production was higher (P < 0.05) and weight loss was lower (P < 0.01) in treatment A than in treatment B, during the first twelve weeks of lactation. There were no differences in production or composition of milk from day 85th to the end of lactation period. The interval from parturition to first ovulation was higher (P < 0.05) and the calving interval shorter (P < 0.05) in treatment A than in treatment B. Crossbred dairy cows should be fed according to National Research Council (1978) standards. Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira 2014-04-17 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://seer.sct.embrapa.br/index.php/pab/article/view/14662 Pesquisa Agropecuaria Brasileira; v.21, n.1, jan. 1986; 67-77 Pesquisa Agropecuária Brasileira; v.21, n.1, jan. 1986; 67-77 1678-3921 0100-104x por https://seer.sct.embrapa.br/index.php/pab/article/view/14662/8346
institution EMBRAPA
collection OJS
country Brasil
countrycode BR
component Revista
access En linea
databasecode rev-pab-br
tag revista
region America del Sur
libraryname Sistema de bibliotecas de EMBRAPA
language por
format Digital
author Paiva, João Alberto de Jesus
Cruz, Geraldo Maria da
Carvalho, Mauro Ribeiro de
Neto, José Lobato
Moreira, Homero Abílio
spellingShingle Paiva, João Alberto de Jesus
Cruz, Geraldo Maria da
Carvalho, Mauro Ribeiro de
Neto, José Lobato
Moreira, Homero Abílio
Effect of two concentrate levels at the beginning of lactation on milk production and reproductive efficiency
author_facet Paiva, João Alberto de Jesus
Cruz, Geraldo Maria da
Carvalho, Mauro Ribeiro de
Neto, José Lobato
Moreira, Homero Abílio
author_sort Paiva, João Alberto de Jesus
title Effect of two concentrate levels at the beginning of lactation on milk production and reproductive efficiency
title_short Effect of two concentrate levels at the beginning of lactation on milk production and reproductive efficiency
title_full Effect of two concentrate levels at the beginning of lactation on milk production and reproductive efficiency
title_fullStr Effect of two concentrate levels at the beginning of lactation on milk production and reproductive efficiency
title_full_unstemmed Effect of two concentrate levels at the beginning of lactation on milk production and reproductive efficiency
title_sort effect of two concentrate levels at the beginning of lactation on milk production and reproductive efficiency
description An experiment was conducted at the "Centro Nacional de Pesquisa de Gado de Leite"/EMBRAPA, utilizing 24 crossbred Holstein-Zebu cows, to test the following treatments: A) feeding regimen calculated to supply the maintenance requirements of crude protein (CP) and total digestible nutrients (TDN) of a 500 kg dairy cow plus 120% of the requirements of these nutrients for an estimated milk production of 12 kg/day during the first twelve weeks of lactation; B) feeding regimen calculated to supply the maintenance requirements of CP and TDN, plus 85% of the requirements of these nutrients for milk production during the same period of  lactation. After this period, all 24 cows were fed according to the National Research Council (1978) standards, to the end of lactation. Milk production was higher (P < 0.05) and weight loss was lower (P < 0.01) in treatment A than in treatment B, during the first twelve weeks of lactation. There were no differences in production or composition of milk from day 85th to the end of lactation period. The interval from parturition to first ovulation was higher (P < 0.05) and the calving interval shorter (P < 0.05) in treatment A than in treatment B. Crossbred dairy cows should be fed according to National Research Council (1978) standards.
publisher Pesquisa Agropecuaria Brasileira
publishDate 2014
url https://seer.sct.embrapa.br/index.php/pab/article/view/14662
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