Lactanting primiparous cows submitted to different feeding systems during the autumm breeding season
Abstract
It was evaluated three feeding systems on the pregnancy rate (TP) and economic performance of primiparous nursing Hereford beef cows, calved with 30 months old and breeding in autumn. The feeding systems were: mowed native pasture supple- mented with a blend of mineral salt and protein (RSP; n=18); differed native pasture supplemented with a blend of mineral salt and protein (DSP; n= 41) and differed native pasture supplemented with mineral salt (DSM; n= 19). The average daily gain during the mating (GDM), TP and the body condiction score (ECC) were analyzed by entirely randomized design. The TP was not affected (P<0.05) by the feeding systems. The GDM was infl uenced (P<0.05) by the feeding systems, however it did not produce effect on the ECC (P>0,05) at the end of the mating season. The blend of mineral salt and protein supplementation and mowed native pasture showed the largest liveweight gain The pregnant cows showed higher values of the traits considered than the no-pregnant cows.. The feeding system with diferred native pasture with additon of the blend of mineral salt and protein showed better economic results.
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