scholarly journals Phenotypic and Genetic Characteristics of Parameters of Lactation Curve in Dairy Cattle

1981 ◽  
Vol 52 (6) ◽  
pp. 480-482
Author(s):  
Tuguyoshi SUGANO ◽  
Kinichi WATANABE ◽  
Yasuhiro MINESAKI ◽  
Tokukazu IZUMI ◽  
Hisashi SAITO ◽  
...  
Keyword(s):  
Dairy Cattle ◽  
Genetic Characteristics ◽  
Lactation Curve

scholarly journals Associations between the time of conception and the shape of the lactation curve in early lactation in Norwegian dairy cattle

2011 ◽  
Vol 53 (1) ◽  
Author(s):  
Fredrik Andersen ◽  
Olav Østerås ◽  
Olav Reksen ◽  
Nils Toft ◽  
Yrjo T Gröhn
Keyword(s):  
Dairy Cattle ◽  
Early Lactation ◽  
Lactation Curve ◽  
Norwegian Dairy

Effect of concentrate escalation postpartum on the shape of the lactation curve and health parameters of Norwegian dairy cattle

2012 ◽  
Vol 143 (2-3) ◽  
pp. 249-258 ◽  
Author(s):  
Fredrik Andersen ◽  
Olav Østerås ◽  
Geir Henning Eid Fjuk ◽  
Harald Volden
Keyword(s):  
Dairy Cattle ◽  
Lactation Curve ◽  
Norwegian Dairy ◽  
Health Parameters

scholarly journals Study of the Lactation Curve in Dairy Cattle on Farms in Central Mexico

2004 ◽  
Vol 87 (11) ◽  
pp. 3789-3799 ◽  
Author(s):  
D. Val-Arreola ◽  
E. Kebreab ◽  
J. Dijkstra ◽  
J. France
Keyword(s):  
Dairy Cattle ◽  
Central Mexico ◽  
Lactation Curve

Genetic characteristics of dairy cattle bred in the Kabardino-Balkar Republic

2011 ◽  
Vol 37 (3) ◽  
pp. 244-248
Author(s):  
N. S. Marzanov ◽  
N. A. Popov ◽  
L. K. Marzanova ◽  
A. N. Popov ◽  
S. N. Petrov ◽  
...  
Keyword(s):  
Dairy Cattle ◽  
Genetic Characteristics

scholarly journals Laktasyon Eğrisinin Tahmininde Kullanılan Üç Farklı Modelin Karşılaştırılması

2019 ◽  
Vol 7 (3) ◽  
pp. 487
Author(s):  
Melis Çelik Güney ◽  
Gökhan Tamer Kayaalp ◽  
Gökhan Gökçe ◽  
Serap Göncü
Keyword(s):  
Dairy Cattle ◽  
Milk Yield ◽  
Exponential Function ◽  
Gamma Function ◽  
Mean Squared Error ◽  
Significance Test ◽  
Microsoft Excel ◽  
Function Model ◽  
Squared Error ◽  
Lactation Curve

In this study, the lactation curve of the milk yield datas of 45 Holstein which were taken from Cukurova University, Faculty of Agriculture, Research and Application Farm, Dairy Cattle Unit were estimated. Three different models, gamma function, exponential function and parabolic exponential function, were used in the estimation of the lactation curve. When compared models, R-squared and mean squared error (MSE) were used as criteria. The analyses were made with Minitab 13.0 V. The graph was drawn with Microsoft Excel 2007. As a result of the study, the model giving the lowest mean squared error and the highest R-squared value was determined as Gama function model. This model is the best among the models used. When the significance test of the parameters, all the parameters were found statistically significant.

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