Effects of Calcium Fertilization on Oxalate of Napiergrass and on Mineral Concentrations in Blood of Sheep

  • Rahman, M.M. (Faculty of Agriculture, University of Miyazaki) ;
  • Nakagawa, T. (Interdisciplinary Graduate School of Agriculture and Engineering, University of Miyazaki) ;
  • Niimi, M. (Faculty of Agriculture, University of Miyazaki) ;
  • Fukuyama, K. (Sumiyoshi Livestock Science Station, University of Miyazaki) ;
  • Kawamura, O. (Faculty of Agriculture, University of Miyazaki)
  • Received : 2011.04.11
  • Accepted : 2011.06.27
  • Published : 2011.12.01


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.


Blood;Calcium Fertilizer;Mineral Status;Napiergrass;Oxalate;Sheep


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