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Effects of Feeding Oxalate Containing Grass on Intake and the Concentrations of Some Minerals and Parathyroid Hormone in Blood of Sheep
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 Title & Authors
Effects of Feeding Oxalate Containing Grass on Intake and the Concentrations of Some Minerals and Parathyroid Hormone in Blood of Sheep
Rahman, M.M.; Nakagawa, T.; Niimi, M.; Fukuyama, K.; Kawamura, O.;
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 Abstract
In order to determine whether oxalate from grasses affects feed intake, blood calcium (Ca) and other blood parameters of adult sheep, two feeding trials were conducted. In Trial 1, one group of sheep received guineagrass (0.47% soluble oxalate) and another group received setaria (1.34% soluble oxalate) for 28 d. In Trial 2, one group of sheep received guineagrass while another group received the same grass treated with an oxalic acid solution (at a rate of 30 g oxalic acid/kg dry matter of hay) for 72 d. All sheep received concentrate mixtures (0.5% of body weight) throughout the experiment. In both trials, it was observed that plasma Ca concentration (11.0-11.7 mg/dl) was significantly (p<0.05) lower in sheep fed high oxalate-containing grasses than in sheep fed low oxalate-containing grasses (12.4-13.7 mg/dl). No differences (p>0.05) were observed in concentrations of magnesium, phosphorus and parathyroid hormone in plasma between the feeding of low and high oxalate-containing grasses. In addition, no differences (p>0.05) were observed in roughage dry mater (DM) intake, total DM intake or body weight of sheep. This study suggests that sheep may consume oxalate-rich forage, but Ca bioavailability may decrease with increasing oxalate levels in the ration.
 Keywords
Oxalate;Forage;Feed Intake;Calcium;Phosphorus;Parathyroid Hormone;
 Language
English
 Cited by
1.
Effects of Calcium Fertilization on Oxalate of Napiergrass and on Mineral Concentrations in Blood of Sheep,;;;;;

Asian-Australasian Journal of Animal Sciences, 2011. vol.24. 12, pp.1706-1710 crossref(new window)
1.
Effects of Calcium Fertilization on Oxalate of Napiergrass and on Mineral Concentrations in Blood of Sheep, Asian-Australasian Journal of Animal Sciences, 2011, 24, 12, 1706  crossref(new windwow)
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A review of oxalate poisoning in domestic animals: tolerance and performance aspects, Journal of Animal Physiology and Animal Nutrition, 2013, 97, 4, 605  crossref(new windwow)
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