Efecto de la restricción proteica en vacas multíparas durante la gestación media y tardía en el crecimiento y fertilidad de la progenie femenina
| Autor: | LÓPEZ VALIENTE, S., MARESCA, S., RODRÍGUEZ, A.M., LONG, N.M., QUINTANS, G., PALLADINO, R.A. |
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| Jazyk: | Spanish; Castilian |
| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Ainfo Instituto Nacional de Investigación Agropecuaria instacron:Instituto Nacional de Investigación Agropecuaria |
| Popis: | The objective of the present work was to investigate the effects of two levels of crude protein (CP) provided to mature dams during late gestation on subsequent heifer’s growth postweaning and reproductive performance. At 121 d prepartum, 68 multiparous Angus cows were blocked by BW and expected calving date andrandomly assigned to low protein (LP, 6% CP) or high protein (HP, 12% CP) at 12 pens per treatment. Following calving, all cow/calf pairs were housed together until weaning, then female progeny were removed and maintained on pasture as a single group. At puberty (P = 0.01) and pregnancy determination (P = 0.05) the HP heifers were heavier than LP heifers. The LM area was greater at 20 mo of age in HP compared to LP heifers (P = 0.01). Serum IGF-1 concentration was greater in HP heifers compared to LP heifers (P = 0.05). No dam nutrition effects were found on offspring age at puberty (P = 0.98), final pregnancy rate (P = 0.28). Protein supplementation during late gestation does not affect reproductive performance of the offspring heifers but did impact their BW evolution. The use of diet with low amount of protein which the female fetus is exposed in utero can affect her subsequent development. |
| Databáze: | OpenAIRE |
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