F Corresponding author. Email: gbanchero inia. The objective of this study was to identify periods in the life foetal and postnatal of Corriedale ewe lambs where different nutrition levels can affect bodyweight at breeding and pregnancy rate in their first year of life. Phase 2 was between marking and weaning Day and phase 3 between weaning to the onset of breeding Day For phase 1, adult ewes had access to improved pastures phase 1, H or native pastures phase 1, L.
After lambing, all ewes and their lambs were offered native pastures. After marking only ewes bearing females lambs were kept. In phase 3, each of the lambs of the four treatments applied during phase 2 were sorted in two new treatments: access to improved pastures phase 3, H or native pastures supplemented with 0. Breeding period lasted 41 days and pregnancy diagnosis was performed 86 days after the onset of breeding. In conclusion, under the conditions of this experiment, the most important parameters to explain successful pregnancy of ewe lambs were the growth rate after weaning, and the liveweight at the onset of breeding.
Additional keywords: fertility, foetal-, pre- and post-weaning nutrition, sheep. Food, fibre and pharmaceuticals from animals. Shopping Cart: empty. Search our journals. Previous Next Contents Vol 55 8.
Abstract The objective of this study was to identify periods in the life foetal and postnatal of Corriedale ewe lambs where different nutrition levels can affect bodyweight at breeding and pregnancy rate in their first year of life.
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