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Ruminant Nutrition and Forage Utilization
Asian-Australasian Journal of Animal Sciences 2011;24(12): 1706-1710.
https://doi.org/10.5713/ajas.2011.11101    Published online October 24, 2011.
Effects of Calcium Fertilization on Oxalate of Napiergrass and on Mineral Concentrations in Blood of Sheep
M. M. Rahman, T. Nakagawa, M. Niimi, K. Fukuyama, O. Kawamura
An experiment was conducted to investigate the effects of calcium (Ca) fertilization on oxalate content in napiergrass (Pennisetum purpureum) and on some blood parameters of sheep. Re-growth napiergrass was grown with or without Ca fertilizer and offered to sheep. Eight sheep, divided into two groups of 4 animals each were used. Calcium-fertilized napiergrass was offered daily to the animals as experimental treatment, whereas without Ca-fertilized napiergrass was given to the animals as control. Results showed that there was a trend to lower soluble and total oxalate concentrations in Ca-fertilized grass than control. The Ca-fertilized grass contained (p<0.05) lower concentrations of K and Mg than control, though Ca fertilization had no affect (p>0.05) on Ca and Na concentrations in plants. Feeding of Ca-fertilized grass had no affect on the feed consumption, blood Mg level and daily gain of sheep. However, sheep fed control grass had lower (p<0.05) blood Ca level than sheep fed Ca-fertilized grass. Our findings suggest that Ca fertilization might minimize the negative effects of oxalate.
Keywords: Blood; Calcium Fertilizer; Mineral Status; Napiergrass; Oxalate; Sheep

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