Nutritional Articles

Apparent digestibilities of diets based on timothy and Italian ryegrass hay harvested in different regions in Japan fed to exercising Thoroughbreds

Published: 2006-02-20

Brief content of the article
These authors compared the apparent digestibility of diets based on timothy hay harvested in Hidaka in Hokkaido (HT) and Italian ryegrass hay harvested in Miyazaki in Kyushu (MI) in Thoroughbreds undergoing exercise. The authors studied also the nitrogen retention and plasma-free amino acid (AA) concentrations to evaluate the quality of the protein contained in the two types of hay. The apparent digestibilities of dry matter, energy, neutral detergent fiber and ether extract were all higher in the MI group than in the HT group (P<0.05). The net nitrogen balance and plasma AA concentrations did not differ significantly between the two forage groups. The authors concluded that the nutritive value of MI is adequate for exercising horses, even though the timothy and Italian ryegrass used in this study were second cuttings, and their nutrient values were not easily comparable.
Keywords: digestibility; hay; region.

Reference
Matsui, A., Inoue, Y. and Asai, Y. 2005.Apparent digestibilities of diets based on timothy and Italian ryegrass hay harvested in different regions in Japan fed to exercising Thoroughbreds. Animal Science Journal. 76: 359-365

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