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On-farm characterization and present status of North Bengal Grey (NBG) cattle in Bangladesh

Published online by Cambridge University Press:  01 August 2011

M. Al-Amin ,
A. Nahar ,
A.K.F.H. Bhuiyan  and
M.O. Faruque
M. Al-Amin
Affiliation:
Department of Animal Breeding and Genetics, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh
A. Nahar
Affiliation:
Department of Dairy Science, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh
A.K.F.H. Bhuiyan
Affiliation:
Department of Animal Breeding and Genetics, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh
M.O. Faruque
Affiliation:
Department of Animal Breeding and Genetics, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh
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Summary

North Bengal Grey (NBG) cattle are an important indigenous cattle genetic resource found mainly in the northern part of Bangladesh. The study was undertaken at Bogra Sadar, Shibgonj and Kahalu Upazila (sub-district) in the Bogra district. The physical and morphological characteristics, and the productive and reproductive performances of NBG cattle were studied. The coat colour of these animals is deep grey to white. The coat colour of the neck region in adult bulls was found to be generally ashy with a range of shades.

The body is small, compact and less fleshy. Ear length and ear width were 18.0±0.17 and 11.0±0.21 cm, respectively. The head length average was 38.0±0.56 cm, the head width 16.0±0.17 cm, the foreleg length average 65.0±0.64 cm, the hind leg length 71.0±0.64 cm, the tail length average 71.0±0.67 cm, the horn length average 9.0±0.39 cm, the horn diameter 10.0±0.37 cm, the average teat length 5.0±0.18 cm, the teat diameter 6.0±0.22 cm, the distance betweenthe front teats 7.0±0.13 cm and the distance between the rear teats 7.0±0.13 cm. Body length, height at wither and heart girth in adult cows were 105.0il.20, 94.0+1.12 and 127.0±1.52 cm, respectively.

The recorded highest peak milk production per day was 3.5±0.18 kg, lactation length was 219±6.1 days, and the dry period was 180±6.8 days. The average birth weight of calves was 18.4±0.52 kg and mature live weight of cows 241.0±4.0 kg. The age at first heat was 869±29.6 days, age at first calving 1191±19.7 days, gestation length 281±1.3 days, calving interval 442±7.4 days, postpartum heat period 110±4.2 days and the number of services per conception 1.4±0.6. About 54% of total cattle population was NBG cattle in the surveyed area of Bangladesh. The results indicated that the productive and reproductive performance of NBG cattle was better than other non-descript indigenous cattle of Bangladesh. The study further revealed an obvious need for more in-depth and objective information on wider samples of this type of indigenous cattle in order to assess the future need for conservation and improvement programs to be undertaken.

Resumen

La raza bovina North Bengal Grey (NBG) es una raza indígena de importante recurso genético que se encuentra en la zona norte de Bangladesh. El estudio se inició en Bogra Sadar, Shibgonj y Kahalu Upažila (Sub-distrito) en la región de Bogra. Se estudiaron las características físicas y morfológicas y los rendimientos productivos y reproductivos de la NBG.El color del manto de estos animales va del gris oscuro al blanco. El color en la zona del cuello en los machos adultos suelen presentar variaciones de gris.

Es un animal de cuerpo pequeño, compacto y poco carnoso. El tamaño de las orejas y circunferencia es de 18,0±0,17 y 11,0±0,21 cm, respectivamente. La medida de la cabeza es de una media de 38,0±0,56 cm, la circunferencia de 16,0±0,17 cm, la largura de las patas delanteras de 65,0±0,64 cm, la parte trasera 71,0±0,64 cm, la cola tiene una longitud de 71,0±0,67 cm, los cuernos 9,0±0,39 cm, diámetro de los cuernos 10,0±0,37 cm, las tetillas 5,0±0,18 cm, circunferencia de las tetillas 6,0±0,22 cm, distancia entre tetillas 7,0±0,13 cm, y distancia entre tetillas traseras 7,0±0,13 cm. La longitud corporal, altura a la cruz y circunferencia torácica en los adultos fue de 105,0±1,20; 94,0±1,12; y 127,0±1,52 cm, respectivamente.

El pico máximo de producción de leche por día fue de 3,5±0,1 kg, la duración de la lactación fue de 210±6,1 días, y el período seco fue de 180±6,8 días. La media de peso al nacimiento fue de18,4±0,52 kg y el peso a la edad madura de las vacas de 241,0±4,0 kg. La edad al primer celo fue de 869±29,6 días, edad al primer parto 1.191±19,7 días, duración de la gestación 281,0±1,3 días, intervalo entre partos 442,0±7,4 días, periodo de celo post-parto 110,0±4,2 días y nùmero de servicios por concepción 1,4±0,5. Alrededor del 54% del total de la población de NBG en el cuestionario provenía de la zona de Bengladesh. El estudio reveló posteriormente la necesidad obvia de una mayor información sobre amplias muestras de este tipo de raza indígena para poder establecer un programa futuro de conservación y mejora de la raza.

Keywords

Genetic resourcePhysical characteristicsNorth Bengal Grey cattleProductionReproductionMeasurements
Type
Research Articles
Information
Animal Genetic Resources/Resources génétiques animales/Recursos genéticos animales , Volume 40 , April 2007 , pp. 55 - 64
Copyright
Copyright © Food and Agriculture Organization of the United Nations 0000

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