-Production and quality of milk from dairy cows grazing exclusively on Mombasa grass pasture, during the spring-summer period and fed roughage supplementations, during the autumn-winter, were evaluated in two consecutive years.The pasture of 11.4 ha was divided into 57 paddocks of 2,000 m 2 each, including three replications with 19 paddocks each.The pasture was managed with two occupation days and 36 resting days. During the spring-summer period, cows received only grass pasture. In the autumn-winter period, they had access to Mombasa grass pasture and received roughage supplementations (black oat pasture; sorghum silage or sugarcane + urea) and pasture every 28 days, alternately. The animals had access to mineral mix and water and received 500 g of concentrated in each of the two milking times. The experimental design used was for response to continuous flow in rotational trial, similar to the Latin square model. In the spring-summer period, the average milk production was 12.2±2.2 and 14.0±3.8 kg/cow per day; for the autumn-winter period, the milk production was 13.5±2.9 and 12.1±2.5 kg/cow per day in the black oat pasture; 11.8±2.5 and 10.9±2.3 kg/cow per day in the sorghum silage and 11.3±1.8 and 8.4±1.5 kg/cow per day in the sugarcane + urea, for 1 st and 2 nd years evaluated, respectively. The black oat was the roughage supplementation that yielded the highest average daily milk production. There were no differences in the milk chemical composition between roughage supplementations.
Estimação por aproximação química dos teores de proteína indegradável insolúvel em detergente neutro em forragens tropicais [Estimation of undegradable neutral detergent insoluble protein in tropical forages by chemical approaching]
Avaliação de métodos de amostragem em pastagens de capim-elefante (Pennisetum purpureum, Schum) e capim-mombaça (Panicum maximum, Jacq) sob pastejo rotacionado [
RESUMOAvaliaram-se pastagens de capim-elefante e capim-mombaça, por intermédio de amostras de extrusa esofágica e simulação manual de pastejo, estimando-se a composição químico-bromatológica, o fracionamento dos compostos nitrogenados e carboidratos, e a digestibilidade in vitro da matéria seca. Foram utilizados 15 e 13 piquetes de capim-elefante e capim-mombaça, respectivamente, com período de ocupação de três dias. As coletas foram realizadas de forma que se obtivessem amostras relativas ao terceiro, segundo e primeiro dias de ocupação. As metodologias de amostragem foram comparadas dentro de espécie forrageira pelo teste t de Student, com arranjo em pares. Foram observados maiores teores de carboidratos totais, fibra em detergente neutro, fibra em detergente ácido, celulose, lignina e frações de lenta degradação e não degradável dos carboidratos, quando se usou a extrusa esofágica, para ambas as gramíneas. Os teores de carboidratos não-fibrosos foram superiores (P<0,05) em amostras obtidas por simulação manual. Valores superiores foram encontrados para as frações de proteínas citoplasmáticas e proteína insolúvel em detergente ácido (fração C) dos compostos nitrogenados na extrusa esofágica da pastagem de capim-elefante. Para o capim-mombaça, foram maiores apenas na fração C. Para a maioria dos parâmetros avaliados, maiores valores foram observados nas amostras de extrusa esofágica.Palavras-chave: extrusa esofágica, pastejo seletivo, simulação manual
This study evaluated the effectiveness of pink pepper meal supplementation (PPM) in the dairy goats diet as an antiparasitic agent compared with ionophore, the monensin sodium. A total of 18 female Saanen goats, were distributed in a completely randomized in groups of three treatments and six replications, consisting of the experimental groups: negative control (did not receive anticoccidial agent or PPS), group 1 (supplemented with 30% of PPM) and group 2 (supplemented with anticoccidial agent -monensin sodium). There was a significant effect of treatments on voluntary feed intake on growing phases (P ≤ 0.05). Furthermore, the animals treated with PPM had the lowest food consumption compared with the other treatments (P ≤ 0.05), but without negative effect on live body weight. In general, at both phases of rearing, it was not detected significant difference between the voluntary feed intake of control group and with monensin sodium supplementation (P > 0.05), but the food consumption in the control group did not result on increase of live body weight probably due to sanitary challenges such as gastrointestinal parasites. The opposite was observed in animals treated with monensin sodium that had the highest body weight (P ≤ 0.05) that did not differ from animals fed with pink pepper (P > 0.05). By the way, in the growth phase our results revealed significantly effect of treatments on live body weight (P ≤ 0.05). Animals fed with pink pepper supplementation had a greater live body weight compared with the control (P ≤ 0.05) and similar to those supplemented with the monensin sodium (P > 0.05). The number of oocysts per gram of faeces was lower in animals treated with PPS that differed significantly from control (P ≤ 0.05). Regarding the count number of eggs per gram of faeces OPG, it was not detected significant effect of treatments (P> 0.05). It was found that the pink pepper supplementation was effective in the control of gastrointestinal parasites of goats, mainly on protozoa family Eimeriidae, revealing potential for use in alternative parasite control programs. Concomitantly also it was showed maximizing animal performance by high live body weight even with the reduction of voluntary feed intake.
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