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Importance of Teat Characteristics in Selecting Cross-bred Dairy Cows on Milk Yield

M.R. Islam1
Department of Dairy Science Bangladesh Agricultural University, Mymensingh-2202 Bangladesh

S.M.I. Husain
Department of Dairy Science Bangladesh Agricultural University, Mymensingh-2202 Bangladesh

M.N. Islam1
Department of Dairy Science Bangladesh Agricultural University, Mymensingh-2202 Bangladesh

M.A. Haque2
Department of Dairy Science Bangladesh Agricultural University, Mymensingh-2202 Bangladesh

Abstract/ Executive Summary:

This study was conducted to find out the importance of various characteristics of teat and to study their relationship with milk yield in crossbred dairy cow. By a previously prepared module, 100 crossbred dairy cows were selected to collection of data for the various measurements and shapes of teat from the Bangladesh Agricultural University (BAU) Dairy Farm and adjacent villages of University. The phenotypic correlation coefficients between teat measurements and test milk yield and between all possible combinations of teat measurements were significant (P<0.01), indicating that length and diameter of teat were related to each other and also to the milk production. A cylindrical shaped teat having middle teat length with highest milk production was found as an asset for a milch cow. It may be concluded that a well characteristics of teat is to be considered for selecting dairy cows on milk yield. Key words: Importance, Teat characteristics, Cross-bred dairy cows, Milk yield .

Keywords: Importance, Teat characteristics, Cross-bred dairy cows,Milk yield

Location: Bangladesh Agricultural University (BAU) Dairy Farm

Start Date: 00-08-1999

End Date: 00-09-1999

Program Area: Variety and Species

Commodity: Cow

Objectives:

1.To measure the shape and size of teat of cross-bred dairy cows

2.To find out the relationship of teat characteristics on milk yield of our cross-bred dairy cows.

Methodology:

The present research work was carried out during the period of August of September, 1999. In order to achieve the objectives of the study, a total of 100 cross-bred cows were selected from Bangladesh Agricultural University (BAU) Dairy Farm and surrounding villages of BAU campus. Milk yield (kg/day), length and diameter of teat (em), distance between teats (em) and shape of teat were measured from each cow during the study period. The above mentioned informations were collected by researcher himself. It was found that most of the cross-bred cows were milked twice a day, morning and evening. So,morning and evening milk yield was combined together to get the actual milk yield of a cow for that day.' Teat length' was measured with a compass from tip to the base of the teat. 'Teat diameter' was measured by using a vernier callipers on base of the teat. On the other hand, •distance between teats' was measured by lightly placing 15 x 11 em sheet coarse plastic paper in contact with tips of the teats immediately after milking with spraying colouring water on teats by a syringe. A visual appraisal was made to evaluate the shape of teat. The teats were classified into cylindrical, bottle and funnel shaped by adopting the description of Ovesen (1972). Statistical analysis such as per cent, mean, standard error, coefficient of variation, correlation coefficient were done to get clean picture from the collected data.

Source of Information: Bangladesh J. Agril. Sci. 30(1): 101-104, January, 2003

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The phenotypic correlation coefficients between teat measurements and test milk yield and between all possible combinations of teat measurements were significant (P<0.01), indicating that length and diameter of teat were related to each other and also to the milk production. A cylindrical shaped teat having middle teat length with highest milk production was found as an asset for a milch cow. It may be concluded that a well characteristics of teat is to be considered for selecting dairy cows on milk yield.

Knowledge Management: Journal