Retirada de antibióticos da dieta para suínos em fase de creche: desempenho, saúde e impacto econômico.

The growth of livestock has led to an increase in research related to animal nutrition using
alternative feeds. Among the existing co-products, there is castor bean meal, with potential use
in ruminant nutrition due to its high crude protein content, however it contains antinutritional
factors that limit its use. Thus, the present study aimed to evaluate the intake, performance,
carcass yield and blood parameters of feedlot heifers, using desolventized castor bean meal, in
partial replacement of soybean meal. The experiment was conducted at the Nossa Senhora
Aparecida farm, with 25 heifers weighing approximately 263±21.5 kg. The animals were
distributed in a completely randomized design with five treatments and five replications, and
the treatments had inclusion levels of desolventized castor bean meal of 0%, 12.5%, 25%,
37.5% and 50%, in substitute for soy bran protein. The experimental period lasted 78 days and
all treatments had corn silage as a roughage source, with a roughage:concentrate ratio of 50:50
and 37:63 for the adaptation and finishing phases, respectively. At the beginning of the finishing
diet, the desolventized castor bean meal was chemically detoxified by mixing it with 6%
calcium hydroxide diluted in water. The animals were weighed at the beginning and end of the
experiment, as well as blood collection to assess kidney and liver function. There was no
significant difference (p>0.05) for the consumption of ether extract, but there was a decreasing
linear difference (p<0.05) for the consumption of dry matter, mineral matter, crude protein and
neutral detergent fiber. There was no influence of the use of detoxified castor bean meal in the
treatments for the evaluated performance and carcass parameters, but in the evaluation of the
liver function, high levels of aspartate-aminotransferase were observed for the 25% treatment.
In this way, the use of castor bean meal detoxified with calcium hydroxide linearly influenced
the reduction of dry matter intake, however it did not influence the performance and carcass
characteristics in relation to the replacement of up to 50% of the soybean meal protein in the
diet of confined Nellore heifers. This fact demonstrates that this co-product is a potential source
of food in the diet of ruminants, however, to be considered a safe food for animal consumption,
it is necessary to improve detoxification methods, either by chemical or thermal processes.

The mastitis control is still a bottleneck for milk producers due to several linked factors such as microbial load, comfort and envinronment of animals permanence. Measures as the ten points program were developed to combat the several factors that cause the disease. However, the failure of some farms is still observed even with implementing such programs. In view of this, some studies point to the human factor as decisive in obtaining quality milk. The work objective was investigated the influence of human factor in the quality milk from midwest region of Minas Gerais farms. The work was developed in Pará de Minas and in adjacent cities, on farms that supply milk to the CCPR (Cooperativa Central dos Produtores Rurais). Was adopted the method of convenience sampling by selecting an acessible sample population. Were analyzed 45 farms separated into three groups: farms with somatic cell counts (SCCs) below 250,000 cells/mL, between 250,000 and 700,000 cells/mL and above 700,000 cells/mL in the last year. The data of SCCs values were provided by CCPR which carriers out monthly control of the quality of milk of all its producers. To evaluating the human factor a questionnaire was applied to the farm owners and another to milkers. A third questionnaire provided by Clínica do Leite researches was applied for both. The questionnaire applying was realized by visit in loco on the farms and individually. The difference on the frequency of responses in the producer and milker questionnaires to each classification was evaluated by chi-square test with maximum error rate of 5 % probability. For the questionnaire provided by Clínica do Leite, a dynamic table was used to compare the responses of milkers and producers. There was no statistical difference between the milker’s responses to the quistionnaires, however, there were differences in some specific questions among the producer’s responses. The Clínica do Leite questionnaire also showed no statistical difference, but it was possible to compare the expectations of producers and milkers on the farms of different groups. We concluded that the human factor, specifically, the attitudes and behaviors of milk producers, contributes to the results of milk quality in farms in the central-west region of Minas Gerais.

Inclusão de grão de milho inteiro na dieta de bezerras mestiças HZ em aleitamento.

LEILOCOMPRE IF: Application for purchases in beef cattle

Whole corn germ inclusion levels in silage of rehydrated corn grain

Procedimentos para registro, fiscalização e controle de estabelecimentos avícolas comerciais de corte

Uso de biofilme de fécula de batata na casca de ovos de galinha armazenados em diferentes ambientes

BOOKLET ON THE USE OF ORGANIC ACIDS AND ESSENTIAL OILS IN THE PERFORMANCE AND INTESTINAL HEALTH OF POULTRY AND SWINE

Prevalence and effect of lameness on dairy production of lactating cows in the Zona da Mata de Minas Gerais.

PLANTS EXTRACTS IN REPLACEMENT TO THE ANTIBIOTIC GROWTH PROMOTER IN DIETS FOR 21 TO 68 DAY AGED PIGS

Use of a mixture of microencapsulated organic acids in diet of piglets in the nursery phase.

Use of probiotic in antibiotic replacement in diets of commercial laying hens

Zootechnical performance and quality of Japanese quail eggs supplemented with organic selenium

Nitrogen Fertilization in Pasture of Brachiaria brizantha cv. Marandu via Organic Compounds

INCLUSÃO DE NUTRACÊUTICO NA DIETA DE VACAS EM LACTAÇÃO E SEUS EFEITOS SOBRE A PRODUÇÃO E A QUALIDADE DO LEITE

Development of a weight prediction tape for high genetic potential of 6 to 120 kg of body weight