ABSTRACT This study examined the effect of different supplementation strategies for ewes in the last third of gestation, kept on a deferred Brachiaria brizantha cv. Marandu pasture, on their performance and the growth curve of their lambs. A total of 54 ewes, of no defined breed, with an average weight of 41.10±3.10 kg, were used in a completely randomized design, divided into three groups (18 ewes per treatmen...
ABSTRACT The objective was to evaluate the inclusion of chitosan (CHI) and technical cashew nut shell liquid (CNSLt) as natural feed additives in cattle diets on nutrient digestibility, ruminal fermentation, and in vitro gas production kinetics. We conducted a completely randomized design with 5×4 factorial arrangement, with 20, 35, 50, 65, and 100% Tifton 85 hay and four additives, monensin (200 mg/kg DM), CNS...
ABSTRACT: This study examined the use of the Gompertz, Groot, monomolecular, Richards and two-compartment-logistic mathematical models to investigate the kinetics of in vitro gas production of diets composed of combinations of Gliricidia hay or silage. In addition, the effects of Gliricidia hay or silage inclusion on the in vitro cumulative gas production of these diets were evaluated. Rumen fermentation kineti...
Resumo: Tradicionalmente, a contabilidade faz o rateio dos custos indiretos na atividade pecuária bovina de ciclo completo com base no custo unitário por animal (cabeça). Por esse critério, o valor de custo atribuído a um bezerro é o mesmo para um animal adulto (vaca), o que sugere não ser o critério mais adequado. O uso de insumos agropecuários, o consumo de alimentos e a compra e venda de animais ocorrem em f...
The objective of this experiment was to evaluate the effects of replacing eCG with FSH or FSH/LH on the diameter of ovulatory follicles (DOF) and the pregnancy rates (PR) of lactating Bos indicus cows subjected to a synchronization of ovulation protocol and fixed-time artificial insemination (FTAI) based on progesterone, estradiol benzoate (EB), PGF2α, and estradiol cypionate (EC). On day 0, primiparous and mul...
The present study tested brown propolis in crude or extract form as a feed supplement for feedlot lambs to identify the type that most improves in vivo nutrient digestibility. Digestibility was assessed by both total fecal collection and internal markers and the results obtained by these techniques were compared. The completely randomized design was used to compare feed intake and nutrient digestibility of 24 m...
The objective was to evaluate the effect of weight, age and production efficiency of cows from genetic groups based on the calf weight at calving and at weaning. For a period of five years, data of 120 cows (60 Angus-Nellore (AN) and 60 Simmental-Nellore (SN)) at four to nine-years of age were evaluated. All cows were maintained on Brachiaria decumbens pastures, with two forage availability levels (high and low...
O objeto de estudo foi o Arranjo Produtivo "Terra Cozida do Pantanal" assim como os vínculos entre os integrantes, possibilitando a governança e o desempenho coletivo, revertendo em desenvolvimento local. Verificaram-se as relações dos atores, destacando-se o papel das redes sociais e órgãos de apoio. O arranjo articulou e mobilizou os atores integrantes, possibilitando o surgimento do capital social, vislumbra...
Objetivou-se avaliar a fermentação e a composição química de silagens da parte aérea e da espiga de milho, submetidas ou não à geada. Avaliou-se a inoculação microbiana, no experimento 1, da silagem de parte aérea de milho, e no experimento 2, da silagem de espiga de milho, submetidas ou não à geada, em delineamento inteiramente casualizado, em esquema fatorial 2 x 2. Em silagens de parte aérea de milho, a inoc...
Objetivou-se avaliar os parâmetros fermentativos, a composição química e a digestibilidade in vitro da matéria seca (DIVMS) de silagens de grãos úmidos de milho, confeccionados com ou sem o uso de inoculante microbiano, em diferentes processamentos. No experimento 1, avaliou-se a inoculação de silagens de grãos úmidos de milho triturados, em delineamento inteiramente casualizado. No experimento 2, avaliou-se a ...