Abstract
The Pabna is one of the potential local cattle breeds in Bangladesh regarding milk production and its nutritive quality. The aim of the study was to know the effect of lactation length, parity and management on production performance and nutritional/physiochemical composition of the milk of local Pabna cows. Besides the regular milking, 15 days’ interval test day milking was recorded from 12 local Pabna cows with different lactation period (up to fifth month of calving) from BLRI Regional Station, Baghabari during January-September, 2018. In addition, 12 and 16 milk samples (200 ml/sample) were collected from the cows raised at BLRI Regional Station and the community of Dairy Development Research Project at Bera, Pabna district during June, 2018, respectively. Data were analyzed in an ANOVA of Completely Randomized Design and independent sample t-test, respectively, using SAS version 9.1.3 (SAS Institute Inc., Cary, NC, USA) including Tukey’s HSD post hoc test to separate means. The average daily milk yield was significantly (p<0.05) higher during the first month (4.62 L) of lactation and the lowest value recorded at 5th month (3.50 L). Among the test days milking better yield observed at 15 days (4.79 L) of experimental lactation period (p<0.05). The effect of lactation stages and parity number had no significant variations (p>0.05) on nutrient compositions of local Pabna cows’ milk in both on-station and community. However, the overall characteristics of milk between on-station and community had significant differences on the composition of total solids (p<0.001), SNF (p<0.001), fat (p<0.01), and protein (p<0.05) where the highest values found as 14.81, 8.65, 6.17 and 3.53% at on-station, respectively. The first month of lactation observed as best milk producing period among the five months and the management system had positive association with milk composition of local Pabna cows.
 Asian J. Med. Biol. Res. March 2019, 5(1): 48-51
Highlights
Milk is an ideal food which contains all the essential nutrients for physiological functions including carbohydrates, proteins, fats, vitamins, minerals in significant amount than any other food items of human being
Several studies (Udo et al, 1990; Hoque et al, 1999; Yeasmin et al, 2017; Rahman et al, 2014) have conducted on milk yield and its compositions in Pabna cattle or their crosses but indepth study based on lactation period, parity number and a comparative management system has not conducted
Daily milk yield of Pabna cows raised at BLRI Research Station did not vary significantly (p>0.05) during 3rd and 4th months of lactation period (Table 1)
Summary
Milk is an ideal food which contains all the essential nutrients for physiological functions including carbohydrates, proteins, fats, vitamins, minerals in significant amount than any other food items of human being. Among the native cattle varieties local Pabna cows are more promising in milk production in Bangladesh (Bhuiyan et al, 2007). The study of Czerniewicz et al (2006) revealed that physiochemical analysis is an important tool to scrutinize the quality of milk encompassing chemical composition, physical properties, microbiological and nutritive values. Several studies (Udo et al, 1990; Hoque et al, 1999; Yeasmin et al, 2017; Rahman et al, 2014) have conducted on milk yield and its compositions in Pabna cattle or their crosses but indepth study based on lactation period, parity number and a comparative management system has not conducted.
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