A comparison of nutrient intake and digestibility in beef cows grazed on nezasa dwarf bamboo (Pleioblastus chino var. viridis)-dominated pasture and improved grass pasture
2003
Yayota, M. (Gifu Univ. (Japan). Faculty of Agriculture) | Kobayashi, M. | Ohtani, S.
Synopsis YAYOTA, M., M, KOBAYASHI and S. OHTANI (2003) : A comparison of nutrient intake and digestibility in beef cows grazed on Nezasa dwarf bamboo (Pleioblastus chino var. viridis)-dominated pasture and improved grass pasture. Grassland Science 49, 430-437. Nutrient intake and digestibility of Japanese Black cows on a native pasture and an improved grass pasture were compared. The native pasture was dominated by Nezasa dwarf bamboo and the improved grass pasture was a monoculture of Italian ryegrass (Lolium multiflorum Lam.). NDF content in the native pasture was higher than in the improved grass pasture. CP content was similar in the both pastures, while degradability of protein was lower in the native pasture than in the improved grass pasture. Cows grazed on the native pasture had lower DM, CP and ME intakes than the cows grazed on the improved grass pasture (P<0.05). There was no significant difference in NDF intake between the pastures (P =0.097). DM, CP and NDF digestibility were lower for cows grazed on the native pasture than for the cows grazed on the improved grass pasture (P<0.001). Compared with the estimated nutrient requirement for maintenance (AFFRCS 2000, NRC 1996), ME intake was not sufficient on the native pasture at the low pasture allowance. This result suggested that supplementary energy is needed for beef cows grazing on the native pasture. On the improved grass pasture, CP or DIP intake considerably exceeded the requirement of the cows and this may lead to depressed fertility in beef cows.
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