O objetivo do presente estudo foi de avaliar o efeito da suplementação mineral vitamínica injetável de fósforo e vitamina B12 no desempenho reprodutivo de fêmeas bovinas da raça Nelore criadas no estado do Pará, submetidas ao protocolo de IATF. Foram utilizadas 170 vacas distribuídas em 2 tratamentos, sendo T1 (n=93) que recebeu 10 ml da suplementação injetável e T2 (n=77) que recebeu 10 ml de placebo, todos no D0 do protocolo de IATF. Todas as vacas receberam o mesmo protocolo de IATF no qual: D0 (implante intravaginal de P4 + 2 mg BE por via IM), D8 (0,5 mg PGF2α + 300 UI eCG + 1 mg CE todos por via IM e remoção do implante de P4), D10 (IATF) e D40 (Diagnóstico gestacional com ultrassom). Os dados foram tabulados em planilhas do programa Microsoft Excel e analisados no programa Statistical Analysis System [SAS] (2009) e submetidos análise de variância pelo 7 Proc GLMMIX. A taxa de prenhez no T1 foi 61,29% (57/93) e T2 com 45,45% (35/77) com diferença significativa (P<0,05). Dessa forma, a suplementação injetável supriu algumas carências de minerais dos animais e promoveu incremento na fertilidade de vacas submetidas a protocolo de IATF.
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The dairy industry diversifies products with organoleptic, dietary, functional, and nutritional properties according to consumer demands and welfare. This study aimed to examine the profile of consumers, data on milk consumption, knowledge, and familiarity with A2A2 milk in the Tocantins State, Brazil. A qualitative survey was carried out through a questionnaire applied to 389 people, distributed in 34 municipalities. Regarding the consumption of dairy products, 21.31% of participants described having some type of discomfort when consuming them. Among participants, 46.27% consumed one to two liters, 28.28% two to four liters, and 25.45% more than four liters per week. Milk was the main dairy product consumed, according to 59.13% of participants. Of all respondents, 76.10% pay little or no attention to the information on the label, versus 23.90% who did not. Regarding A2A2 milk, 40.36% possessed some knowledge about it, while 59.64% did not. 42.93% and 30.59% of participants stated they would be willing to pay over 10% or 50% more, respectively, whereas 24.94% would not pay any additional amount on the price of A2A2 milk. Willingness to pay a low additional amount was related to consumers who heard of, but knew little about this product, whereas the likelihood of paying higher additional amounts was associated with respondents who heard and know about the product.
This study examined the effect of administering an additional dose of prostaglandin F2 alpha (PGF2?), in a fixed-time artificial insemination protocol (FTAI), on the fertility of female Nellore cattle. Two experiments were carried out: the first (Experiment I) took place in the state of Tocantins and the second (Experiment II) in the state of Pará, Brazil. In Experiment I (E1), 80 cows were used in three treatments (T1, T2 and T3) in which all received the same FTAI protocol. In T1 (n = 29), the cows received 12.5 mg of Dinoprost on day 9; in T2 (n = 28), they received the additional dose on day 10; and in T3 (n = 23; control group), the animals did not receive the additional PGF2? dose. Experiment II consisted of 147 bovine females distributed into two treatment groups, namely, T1 - 72 animals receiving the same protocol as T1 of E1; and T2 - 75 animals receiving the same protocol as T3 of E1. Statistical analysis was performed using SAS software, applying the PROC NPARWAY procedure for E1, and means were compared by the Wilcoxon test at the 5% significance level. In Experiment II, the data were subjected to analysis of variance by PROC GLIMMIX and means were compared by the T test at the 5% significance level. The following pregnancy rates were obtained in Experiment I: T1 - 62.06% (18/29); T2 - 57.14% (16/28); and T3 - 52.17% (12/23), with no significant difference observed between treatments. In Experiment II, pregnancy rate in T1 was 66.67% (48/72), whereas in T2 it was 41.33% (31/75), with a significant difference detected (P < 0.05). An additional dose of PGF2? provides an increase in pregnancy rate in Nellore females.
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