Effect of body condition at calving and postpartum plane of feeding on the feed intake and conversion efficiency of crossbred dairy cows

Prasad, S.; Tomer, O.S.

Indian Journal of Dairy Science 50(4): 294-301

1997


ISSN/ISBN: 0019-5146
Accession: 003105243

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Abstract
24 first- and second-lactation crossbred cows (Karan Swiss and Karan Fries) were randomly assigned to 3 groups and fed rations providing 100% (M), 130% (H) and 80% (L) of NRC 1989 standard in terms of energy level during the 2 months prepartum. For 126 days post partum, 4 cows each from the H and L groups were fed L and the others H, to give feeding combinations of MM (control), HH, HL, LL and LH. Measurements of DM, crude protein and total digestible nutrient intakes respectively, obtained fortnightly, showed overall average values ranging from 151.1+or-3.13, 19.7+or-0.51 and 99.8+or-3.13 kg/fortnight in the LL group to 197.1+or-3.13, 30.1+or-0.51 and 136.8+or-2.32 kg/fortnight in the HH group; these were significantly lower and higher respectively than control values. The FCM yield/kg metabolic body size ranged from 2.22+or-0.06 kg in the LL to 2.71+or-0.06 in the LH group. The gross efficiency of energy conversion, which declined throughout lactation in all groups, averaged 36.49+or-0.72, 36.46+or-0.96, 33.31+or-0.96, 32.44+or-0.96 and 35.05+or-0.96 in groups MM, HL, HH, LH and LL respectively, and was significantly lower in the LH than MM and HL groups.