Studies on some factors influencing the shape of the lactation curve in Romanian Black and White cows

The aim of this paper was to study the effects of farm and parity on the shape of the lactation curve for milk yield,milk fat percentage, milk protein percentage and milk lactose percentage. Researches were carried out on 421lactations obtained from a population of 260 Romanian Black and White cows...

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Main Authors:	Traian Cismaş, Ludovic Toma Cziszter, Stelian Acatincăi, Simona Baul, Silvia Erina, Dinu Gavojdian
Format:	Article
Language:	English
Published:	Agroprint Timisoara 2012-10-01
Series:	Scientific Papers Animal Science and Biotechnologies
Subjects:	cow farm management lactation curve parity romanian black and white
Online Access:	http://spasb.ro/index.php/spasb/article/view/391

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spelling	doaj-5c8a48d8de5e440aace30aae776c26032020-11-25T03:35:02ZengAgroprint TimisoaraScientific Papers Animal Science and Biotechnologies1841-93642344-45762012-10-01452294300315Studies on some factors influencing the shape of the lactation curve in Romanian Black and White cowsTraian Cismaş0Ludovic Toma Cziszter1Stelian Acatincăi2Simona Baul3Silvia Erina4Dinu Gavojdian5Faculty of Animal Sciences and Biotechnologies TimişoaraFaculty of Animal Sciences and Biotechnologies TimişoaraFaculty of Animal Sciences and Biotechnologies TimişoaraFaculty of Animal Sciences and Biotechnologies TimişoaraFaculty of Animal Sciences and Biotechnologies TimişoaraFaculty of Animal Sciences and Biotechnologies TimişoaraThe aim of this paper was to study the effects of farm and parity on the shape of the lactation curve for milk yield,milk fat percentage, milk protein percentage and milk lactose percentage. Researches were carried out on 421lactations obtained from a population of 260 Romanian Black and White cows reared in the South-eastern Romania.Test day data was modelled using the incomplete gamma function, and then the lactation curves were drawn takinginto consideration the effect of farm (farm 1 and farm 2) and parity (lactation 1, 2 and 3+). Both factors had asignificant effect (p<0.05) on the shape of the lactation curve, affecting the initial production (parameter a), the rateof increase/decrease to the peak/nadir (parameter b), as well as the rate of decrease/increase of production until theend of lactation (parameter c).http://spasb.ro/index.php/spasb/article/view/391cowfarm managementlactation curveparityromanian black and white
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Traian Cismaş Ludovic Toma Cziszter Stelian Acatincăi Simona Baul Silvia Erina Dinu Gavojdian
spellingShingle	Traian Cismaş Ludovic Toma Cziszter Stelian Acatincăi Simona Baul Silvia Erina Dinu Gavojdian Studies on some factors influencing the shape of the lactation curve in Romanian Black and White cows Scientific Papers Animal Science and Biotechnologies cow farm management lactation curve parity romanian black and white
author_facet	Traian Cismaş Ludovic Toma Cziszter Stelian Acatincăi Simona Baul Silvia Erina Dinu Gavojdian
author_sort	Traian Cismaş
title	Studies on some factors influencing the shape of the lactation curve in Romanian Black and White cows
title_short	Studies on some factors influencing the shape of the lactation curve in Romanian Black and White cows
title_full	Studies on some factors influencing the shape of the lactation curve in Romanian Black and White cows
title_fullStr	Studies on some factors influencing the shape of the lactation curve in Romanian Black and White cows
title_full_unstemmed	Studies on some factors influencing the shape of the lactation curve in Romanian Black and White cows
title_sort	studies on some factors influencing the shape of the lactation curve in romanian black and white cows
publisher	Agroprint Timisoara
series	Scientific Papers Animal Science and Biotechnologies
issn	1841-9364 2344-4576
publishDate	2012-10-01
description	The aim of this paper was to study the effects of farm and parity on the shape of the lactation curve for milk yield,milk fat percentage, milk protein percentage and milk lactose percentage. Researches were carried out on 421lactations obtained from a population of 260 Romanian Black and White cows reared in the South-eastern Romania.Test day data was modelled using the incomplete gamma function, and then the lactation curves were drawn takinginto consideration the effect of farm (farm 1 and farm 2) and parity (lactation 1, 2 and 3+). Both factors had asignificant effect (p<0.05) on the shape of the lactation curve, affecting the initial production (parameter a), the rateof increase/decrease to the peak/nadir (parameter b), as well as the rate of decrease/increase of production until theend of lactation (parameter c).
topic	cow farm management lactation curve parity romanian black and white
url	http://spasb.ro/index.php/spasb/article/view/391
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Studies on some factors influencing the shape of the lactation curve in Romanian Black and White cows

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