Abstract
The objective of this study was to evaluate the nutrients intake and water balance of horses in maintenance, fed with conventional hay. Six male horses with an average age of nine years and live weight of 361.16 ± 12 kg were used, in a latin square design (6x6), housed in metabolism cages. The treatments were FTT: 100% Hay of Tifton, FTO: 80% Hay of Tifton + 20% Hay of Alfalfa, FTS: 60% Hay of Tifton + 40% Hay of Alfalfa, FTQ: 40% Hay of Tifton + 60% Hay of Alfalfa, FTV: 20% Hay of Tifton + 80% Hay of Alfalfa, FAT: 100% Hay of Alfalfa. The quantities of food provided were 2.25% of BW in order to obtain surplus. To determine the water intake, drinkers with water supply ad libitum were used. The intakes of DM, CP, EE and MM increased (P ? 0.05) as alfalfa hay amount was increased in the diets, indicating that these elements are related to the diets chemical composition. Similarly, NDF and ADF intake decreased (P ? 0.05) as alfalfa hay was increased in the diets. The values of water intake and excretion were influenced by the chemical composition of the diet, influencing water intake in function of the dry matter (liters/ kg of DM) and the water balance. Regarding water intake and excretion, the animals were in positive water balance in all treatments. The FTT treatment had a lower urinary and fecal excretion of water compared to the other treatments. KEYWORDS: Feeding; horse; hydration; nutrition
Highlights
MATERIAL E MÉTODOS as marchas, nas quais o animal percorre longas distâncias, o aporte de nutrientes e de eletrólitos manti
FTO: 80% Feno de Tifton + 20% de Feno de Dentre os nutrientes requeridos, a água, mui- Alfafa, FTS: 60% Feno de Tifton + 40% de Feno de tas vezes por ser “abundante e barata”, é negligenci- Alfafa, FTQ: 40% Feno de Tifton + 60% de Feno de ada e, segundo NYMAN & DAHLBORN (2000), os Alfafa, FTV: 20% Feno de Tifton + 80% de Feno de equinos submetidos ao esforço físico têm grande au- Alfafa, FAT: 100% de Feno de Alfafa
Com relação ao consumo e excreção de água, observou-se que em todos os tratamentos os animais apresentaram-se em balanço hídrico positivo
Summary
LEONIR BUENO RIBEIRO1 , CARLOS EDUARDO FURTADO2, ROBERTA ARIBONI BRANDI3, ANDRÉA CRISTINA SOUZA PAULA4, CLEITON LUIZ TONELLO5, DANIEL AUGUSTO AFONSO6. 3 - Professora Doutora do Departamento de Zootecnia - FZEA/USP 4 - Zootecnista, Universidade Estadual de Maringá - UEM. 5 - Zootecnista, Escola Superior de Agronomia de Paraguaçu Paulista - ESAPP 6 - Aluno do curso de Zootecnia da Escola Superior de Agronomia de Paraguaçu Paulista - ESAPP. Objetivou-se avaliar o consumo de nutrientes e o balanço hídrico em equinos em mantença, alimentados com fenos convencionais. Para o consumo de água, utilizaram-se bebedouros com fornecimento de água à vontade. Os valores de consumo e de excreção de água foram influenciados pela composição química da dieta, influenciando diretamente no consumo de água em relação à matéria seca (litros/kg de MSI) e no balanço hídrico. Com relação ao consumo e excreção de água, observou-se que em todos os tratamentos os animais apresentaram-se em balanço hídrico positivo.
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