Effect of parity on intake and utilization of a high forage low concentrate ration by Bunaji cows in early lactation

Adeneye, J.A.

Nigerian Journal of Animal Production 20(1/2): 71-80

1993


Accession: 002603493

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Abstract
Three groups of 4 Bunaji cows each in the 1st, 4th and 7th parities were fed on high-forage, low-concentrate rations during early lactation. Cattle were given a 3:1 mixture of Cynodon nlemfuensis variety robustus and Gliricidia sepium leaves ad libitum for 10 weeks from 2 weeks into lactation. Diets were supplemented with concentrate 1 kg/head daily, which provided 16% of the total DM intake. On a metabolic size basis, the actual and digestible DM, CP and energy intake declined with increasing parity, being lowest for those in their 7th parity (P<0.05). Cows in their 4th parity produced maximum fat-corrected milk (FCM), solids-corrected milk (SCM) and actual milk that contained the least total solids, fat and energy value, but the highest solids-not-fat and lactose (P<0.05). These cows also converted DM, digestible CP and DE most efficiently into actual milk, FCM and SCM, and the nitrogen intake absorbed into milk N. Weight gain was apparently unaltered in cows in their 4th parity, whilst primiparous cows gained 1.5 times as much weight as the older cows. Primiparous cows utilized more efficiently DM, digestible CP and DE consumed for weight gain, while the liveweight gain:milk yield was higher (P<0.05). Multiparous cows required 110% of the recommended CP but all cows required 70-85% of the recommended DE for maintenance and productive purposes.