000			02690nam a2200193Ia 4500
005			20150917142617.0
008			150525s1996 xx 000 0 und d
041			_aeng
082			_a0457,T
100			_aHussain, M _95553
110			_cProf.Dr.Talat Naseer Pasha _95470
245			_aEffect Of Different Dietary Energy Levels On Growth And Onset Of Sexual Maturity In Sahiwal Heifers
260			_c1996
502			_aThe study was conducted to determine the influence of different dietary energy levels on growth rate, feed efliciency, feed intake, nutrient digestibility and sexual maturity in Sahiwal heifers. Eighteen Sahiwal heifers of 15-20 months age were andomly divided into three groups. Three experimental rations providing dietary energy levels 100, 80 and 120 percent of NRC (1989) were used and designated as A, B and C. During a period of 90 days, the heifers gained 54.1, 52.5 and 55.5 Kg. weight under plan A, B and C, respectively. The differences in gain in weight of heifers plans A, B and C were non significant. Average daily dry matter intake were 4.84, 4.90 and 4.93 Kg. under groups A, B and C, respectively. The statistical analysis showed non significant differences among dry matter intakes under different plans of nutrition Daily intakes of crude protein under plans A, B and C were almost similar. Feed efficiency was 8.86, 8,91 and 8.83 for group A, B and C, respectively. The difference in feed efficiency was non significant among different groups. The digestibility coefficient of dry matter, crude protein, ether extract and crude fibre ranged from 54.76 to 59.8, 59.5 to 61.0, 66.1 to 72.5 and 64.1 to 67.1 for all groups, respectively. The statistical analysis of data did not indicate any significant differences with respect to digestibility of various nutrients of the rations among different plans of nutrition. Physiologica1 studies were also performed on experimental heifers to ascertain the effect of different dietary energy levels on serum protein, serum glucose and serum progesterone. Average serum concentration of protein, glucose and progesterone were 7.06 to 7.79 gm/dl 103.09 to 134.4lmg/di and 1.08 to 1.20/dl, respectively in all groups. Concentration of serum protein and serum progesterone were statistically non significant among all groups. The concentration of serum glucose was statistically significant among three groups. Effect of different dietary energy levels on age of puberty of heifers was also studied but none of heifers of all groups showed sign of oestrus.
650			_aDepartment of Animal Nutrition _94437
700			_aDr. Muhammad Aleem Bhatti _95554
700			_aMr. Anjum _95555
942			_cTH
999			_c2211 _d2211