16-Title: Growth performance, nutrient digestibility, feed conversion ratio and cost of feeding in Mehsana heifers fed cotton seed cake and rumen-protected methionine and lysine supplement
Authors: GV Patel, SR Bhagwat, MM Pawar, KB Prajapati, BK Ashwar and AS Sheikh
Source: Ruminant Science (2015)-4(1):65-70.
How to cite this manuscript: Patel GV, Bhagwat SR, Pawar MM, Prajapati KB, Ashwar BK and Sheikh AS (2015). Growth performance, nutrient digestibility, feed conversion ratio and cost of feeding in Mehsana heifers fed cotton seed cake and rumen-protected methionine and lysine supplement. Ruminant Science 4(1):65-70.
The experiment was conducted to study the growth performance, nutrient digestibility, feed conversion ratio and cost of feeding in Mehsana heifers fed cotton seed cake and rumen-protected methionine and lysine supplement. Eighteen growing Mehsana heifers were fed experimental diets in three groups of six animals each for a period of 90-d. The diets were T1: concentrate mixture + maize fodder + bajra grass hay; T2: concentrate mixture and cotton seed cake (CSC) [50:50] + maize fodder + bajra grass hay and T3: Treatment-1 + Supplementation of rumen-protected methionine (MetiPEARL: containing 45% methionine) and lysine (LysiPEARL: containing 50% lysine) in concentrate mixture at the rate of 5 and 10 g/h/d, respectively. The fortnightly body weight changes and average daily body weight gain did not differ (P>0.05) among the treatment groups. However, overall changes in body weight and average daily gain were significantly (P<0.05) higher in T3 group than the T1 group and comparable to both in T2 group. The overall DM intake was significantly (P<0.05) higher in T3 group than T2 and T1 groups; but, the intakes digestible crude protein and total digestible nutrients were similar among the treatment groups. The apparent total tract digestibility of DM, CP, EE, NDF and ADF did not differ among the treatment groups. The feed conversion ratio was significantly (P<0.05) better in T3 group followed by T2 and T1 groups. The average cost of feeding (Rs./animal/day) was without any significant difference in T1, T2 and T3 groups. Results revealed that supplementation of cotton seed cake and rumen-protected methionine and lysine in Mehsana heifers resulted in better growth rate, feed intake and feed conversion ratio, but nutrient digestibility and cost of feeding were unaffected.
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