Department of Animal Husbandry and Dairying, Institute of Agricultural Science Banaras Hindu University, Varanasi- 221 005, India
*Correspondence author's e-mail: albialbhu@gmail.com
Online published on 1 March, 2014.
The objective of this study was to evaluate the effect some environmental factors on birth weight, weaning weight and daily gain weight in Nali lambs. Data from 77 records were analysed. Results showed that birth weight (BW), weaning weight (WW), average daily gain at pre-weaning (ADG1) and average daily gain at post-weaning (ADG2) were influenced by year and season of lambing, sex of lambs, and parity of dam. Birth weight of lambs born during the year 2008 was significantly heavier (2.49± 0.04 kg) than year 2007 (2.21± 0.05 kg). Also WW and ADG1 in 2008 were significantly (P< 0.05) heavier than lambs born in 2007. The W6 of lambs born in rainy season was higher than of those born in winter and summer ADG1 and ADG2 of lambs born in rainy season and winter were higher than those born in summer. BW, WW, ADG1 and ADG2 of males were higher than female. The significant influence of ewe parity on lamb growth performance up to weaning stage.
Birth weight, Environmental factors, Nali sheep growth
