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Comparison of Different Models for Estimation of Standardized 300 Day Milk Yield from 15 Day Test Interval Records of Red Chittagong Cattle in Bangladesh

Md. Ahsan Habib
Senior Scientific Officer (SSO)
Fodder Research and Development Project, Bangladesh Livestock Research Institute (BLRI), Savar, Dhaka 1341, Bangladesh

A K Fazlul Haque Bhuiyan
Bangladesh Agricultural University (BAU), Mymensingh 2202, Bangladesh

Md. Ruhul Amin
Bangladesh Agricultural University (BAU), Mymensingh 2202, Bangladesh

Md. Sajjad Khan
University Agriculture Faisalabad, Pakistan

Abstract/ Executive Summary:

The present study was carried out with retrospective data collected from the nucleus herd of the USDA-funded Red Chittagong Cattle (RCC) project at Bangladesh Agricultural University (BAU) and community herd at Char Jailkhana, Mymensingh during 2005 to 2011. The 15 days test interval daily milk yield records of 141 lactations taken from 52 cows from two different herds were collected to estimate multiplicative ratio factors (RF), simple regression from last test day milk yield record (SRLTD) and last test day along with average daily milk yield from known lactation part at any duration (SRLTAD) for prediction of standard 300 days milk yield. The correlations among 300 day milk yields estimated by three different extension models were also investigated and were found no statistically significant differences (P>0.05) with significantly (P<0.01) highly correlated with each other. The results revealed the accuracy of prediction of ratio factors and regression coefficients for three different models and may be adopted any of those models to extend standardized milk production (300 day) for RCC in Bangladesh.

Keywords: RCC, Ratio factors, Regression coefficients, Test interval records, Standardized milk yield

Location: Bangladesh Agricultural University (BAU) and community herd at Char Jailkhana, Mymensingh, Bangladesh

Start Date: 00-00-2005

End Date: 00-00-2011

Program Area: Comparative study

Commodity: Milk, Cattle

Objectives:

The main objective of this study was to estimate ratio factors and regression coefficients to extend milk yield for 300 days from any partial test interval records of RCC and to estimate correlations between three different methods.

Methodology:

Study location and climates: The study was carried out from two different sites; the on-station nucleus herd located about 4.5 km apart from Mymensingh city in Bangladesh lies between 24⁰30´ and 25⁰10´ North latitude and 90⁰15´ and 91⁰15´ East longitude and on-farm community herd located about 2.0 km apart in the Northside from Mymensingh city lies between 24⁰77´ and 24⁰78´ North latitude and 90⁰39´ and 90⁰41´ East longitudes. It has a pronounced tropical monsoon-type climate has warm temperatures throughout the year, with a hot and rainy summer and a dry winter with relatively little variation from month to month. January tends to be the coolest month with temperatures averaging near 26⁰C (780F) and April/May the warmest with temperatures from 33 to 36⁰C (91 to 96⁰F). The climate is one of the wettest in the world. Most places in the plain land receive more than 1,525 mm of rain a year. Most rains occur during the monsoon (June-September) and little in winter (November-February). There are three prominent seasons: the dry summer/pre-monsoon/hot season from March to June, monsoon/wet summer/rainy season from July to October and winter/dry season from November to February. Feeding and management of animals: The feeding and management of RCC on-station (nucleus herd) was solely intensive where animals were stall-fed throughout the year. The animals were provided three different kinds of feeds such as concentrate, green grass and straw where straw was the basal diet added with urea and/molasses. Animals were grazed at seldom due to lack of facility. Urea-molasses-straw (UMRS) or sometimes only molasses-straw (MRS) were provided twice a day ad libitum throughout the year. Green forages and roadside grasses were provided with a limited amount due to scarcity. Concentrate mixture (Corn, Wheat bran, Rice Police, Mustard Oil cake, Soybean meal) was supplied once a day in the morning at the rate of 600g/lactating cow, 500g/pregnant cow, 400g/dry cow and heifers. The feeding and management system of RCC on-farm (community farmer’s house) were not similar as in the nucleus herd. Farmers seldom used straw for their animals. Roadside, landside or fellow land green grasses were the main sources of feed. During dry and cropping seasons cut and carry green grasses were used to feed their animals. Farmers used to escape their animals for grazing in around 6 to 8 hrs a day. Farmers used to offer drink water for their animals with some bran (wheat or rice) and salt regularly according to their ability specially lactating cows. After freshening, cows were hand milked once a day except test days when morning and evening milking were allowed to count total daily milk yield for recording exclusively of that drawn by the calves until production declined below 250g per day. The calves were allowed to suckle their dam for few hours after milking and again few hours before evening and it continued up to 3-4 months. Afterward, calves were allowed to suckle once a day after milking until weaning. Due to low yields and short lactation duration, cows were actually milked until they spontaneously became dry; hence forced drying due to advanced pregnancy seldom occurred. In the farmer’s house, calves were allowed to present with their dam after milking up to evening. Heat detections were by the signs of estrous and observed daily for every cow. Breeding is usually commenced by artificial insemination (AI) technique at the first estrous both for lactating cows and heifers (subject to confirmation). Animals were dewormed and vaccinated at regular intervals by the close monitoring of the project personnel. Regular vaccination (against FMD and Anthrax disease), deworming (according to incidence on fecal sample examination) and medicare were performed in both herds.

Source of Information: Asian Australas. J. Biosci. Biotechnol. 2019, 4 (1), 67-73; ISSN 2414-1283 (Print) 2414-6293 (Online)

Article Link (Online Journal): www.ebupress.com/journal/aajbb

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

In the summing up of this study, it should however be concluded that both ratio factors and regression coefficients estimated in this study could be used more accurately to estimate 300 day milk yield for the indigenous cattle available in Bangladesh as indicated by their correlations study.

Knowledge Management: Journal