The objective of this study was to evaluate the effect of the animal category, the cyclicity, the CIDR reuse, the body condition score (BCS), the inseminator and the bull on the fertility rates of bovine submitted to a FTAI protocol. It was observed that pluriparous demonstrated a higher fertility. The group With Corpus Luteum obtained a higher conception rate. The CIDR of 4th use reduced (P <0.05) the chance of conception. The chances of conception in cows of the Low BCS group were lower (P <0.05), than the cows with intermediate and high BCS. The inseminator and the bull exerted influence on the fertility. Therefore, all factors are important in FTAI programs.

The objective of this study was to evaluate the effect of the inclusion of different levels of mango residue (0, 10, 20 and 30% natural matter) in the mixed silages of elephant grass and cassava peels. The material was ensiled for 60 days in polyvinyl chloride "PVC" experimental bags. There was a maximum loss (P<0.05) of the effluent of 48.5 kg/ton of natural matter with the inclusion of 24.3% of mango residue in the elephant grass silage and cassava peel. Maximum dry matter (DM) loss (P<0.05) of 22.1% and minimum DM recovery (P<0.05) of 78.9% were found with the inclusion of 21.1% and 21.4% of mango residue. Quadratic behavior (P<0.05) was observed for the chemical composition of the silages, with minimum DM content (29.2%) and non-fibrous carbohydrates (37.6% NFC), and maximum crude protein (9.64% CP) and neutral detergent fiber (41.6% NDF) contents, with the inclusion of 23.5%, 8.90%, 10.7%, and 9.11% of mango residue, respectively. In the sensory evaluation regarding the characteristics associated with the nutritional value, the classification "good to very good" was recorded for the silages where the elephant grass and the cassava peels were added with 10% and 20% of mango residue. The inclusion of 10.7% of natural mango residue in elephant grass and cassava peel silages is enough to improve crude protein content, with lower effluent loss.

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