[Download] ~ Effects of Calcium Fertilization on Oxalate of Napiergrass and on Mineral Concentrations in Blood of Sheep (Report) # by Asian - Australasian Journal of Animal Sciences ~ eBook PDF Kindle ePub Free

eBook details

• Title: Effects of Calcium Fertilization on Oxalate of Napiergrass and on Mineral Concentrations in Blood of Sheep (Report)
• Author : Asian - Australasian Journal of Animal Sciences
• Release Date : January 01, 2011
• Genre: Industries & Professions,Books,Business & Personal Finance,
• Pages : * pages
• Size : 296 KB

Description

INTRODUCTION Oxalic acid is synthesized by a wide range of plants and its concentration in animal feed is of great concern because of health-related hazard. Oxalic acid occurs in plants as soluble and/or insoluble salts. Previous studies suggest that insoluble oxalate, which presents mostly as a calcium (Ca) complex, is not thought to have a harmful effect on the body's metabolism as it seems to pass through the digestive tract (Ward et al., 1979), whereas soluble oxalate is likely to be absorbed in the intestine and cause chronic Ca deficiency (Blaney et al., 1982). McKenzie et al. (1988) reported that levels of 2.0% or more soluble oxalate can lead to acute toxicosis in ruminants. In a previous study, we observed that sheep fed high oxalate-containing grass had lower blood Ca levels than sheep fed low oxalate-containing grass (Rahman et al., 2011). Although soluble oxalate is degraded by rumen microflora (Allison et al., 1977) to some extent, there has been no attempt to assess the potential of using Ca fertilizer in grass to reduce the toxicity of soluble oxalate in ruminants.

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