GROWTH PERFORMANCE OF RABBITS FED SWEET POTATO VINEBASED DIETS SUPPLEMENTED WITH METHIONINE AND LYSINE

Authors

  • Uchegbu E. C.
  • Iyeghe-Erakpotobor G. T

Keywords:

Forage meal, sweet potato vine, lysine, methionine, growth, rabbits

Abstract

In a ten week feeding trial, seventy-two (72) weaned mixed breed rabbits aged six to seven
weeks old, with initial live weight ranging from 600g to 1130g, were randomly allocated to
twelve treatment diets in a 3 x 2 x 2 factorial experiment in a completely randomized design.
The factors were: (1) Sweet potato vine at levels of 0, 15 and 30%, (2) methionine at low (0.07
kg) and high (0.10 kg) supplementary levels and (3) lysine at low (0.12 kg) and high (0.15 kg)
supplementary levels. Results obtained showed that sweet potato levels gave similar final
weight, weight gain, average daily gain and feed conversion efficiency.15% sweet potato vine
gave the least feed cost, while 30% sweet potato vine gave the least feed cost kg-1
gain. Final
weight, weight gain, average daily weight gain, feed conversion efficiency, feed cost and feed
cost kg-1
gain were not affected by methionine or lysine levels. Low lysine encouraged higher
daily feed intake than high lysine supplementation. There was no interaction between sweet
potato vine level and methionine supplementation on growth parameters except daily feed
intake and feed cost.Control (0%) and 15% sweet potato vine at both low and high methionine
levels encouraged higher daily feed intake, while levels of sweet potato vine at high lysine
supplementation encouraged only daily feed intake. There was no interaction between
methionine and lysine supplementation level on final weight, weight gain, average daily weight
gain, daily feed intake, feed conversion efficiency, feed cost and feed cost kg-1
gain.Feed cost
was affected by the interaction between sweet potato vine and methionine and, between sweet
potato vine and lysine.Feed cost was highest for rabbits on 0% sweet potato vine at high lysine
supplementation while rabbits on 15% sweet potato vine at low lysine supplementation level
had the lowest feed cost. Feed cost kg-1
gain was also lower on 15 and 30% sweet potato vine
meal than 0% sweet potato vine meal diet at low methionine,low lysine; high methionine, low
lysine; and high methionine,high lysine supplementation levels. It is therefore recommended
that 30% sweet potato vine could be fed to rabbits while for supplementation, 15% sweet potato
vine mealsupplemented with high methionine, low lysine;or low methionine, high lysine would
enhance profitability for the farmer.

Published

2015-12-30