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Ruminant Nutrition and Forage Utilization
Asian-Australasian Journal of Animal Sciences 1997;10(3): 265-273.
https://doi.org/10.5713/ajas.1997.265    Published online June 1, 1997.
Effect of low levels of leucaena foliage supplementation on intake, nutrient digestibility and microbial N yield in cattle fed rice straw alone
S. A. Chowdhury
The minimum amounts of leucaena (Leucaena leucocephala) required to improve the performance of cattle on a straw diet has been studied. Four levels of leucaens, namely 0 (0%), 2 kg (10%), 4 kg (18%) and 6 kg (27% of dietary dry matter intake) were supplied to 4 adult indigenous bulls (355 21.5 kg weight) fed rice straw alone, in a 4 횞 4 latin square design. Measurements were made on intake, digestibility, N balance and microbial N yield. Up to 10% level of leucaena supplementation, there were no significant improvement on intake, digestibility, microbial N yield and N balance. Both straw and total dry matter intake showed diminishing return to increasing levels of leucaena supplementation and the maximum intake was observed at around 20% level. However, dietary N and digestible organic matter intake, the microbial N yield and the N balance increased linearly to the increasing levels of leucaena supplementation. On a rice straw based diet, the minimum level of leucaena required to improve the animal performance would probably be at around 20% of the dietary intake.
Keywords: Leucaena Supplement; Straw Diet; N Balance; Microbial N Yield

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