A possible effect of cyanogenic glucoside in sorghum on animal requirements for sulphur

Wheeler, J.L. and Hedges, D.A. and Tillman, A.R. (1975) A possible effect of cyanogenic glucoside in sorghum on animal requirements for sulphur. Journal of Agricultural Science, 84 (2). pp. 377-379.

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Young merino sheep grazing Sorghum bicolor X S. sudanense got saltlicks with under 0.1% S for controls and 18% S for test sheep. In 28 days the test sheep gained 18% more bodyweight than controls for mean S intake 1.1 g daily; in another trial, in 35 days the difference was 13% for intake of S 0.6 g daily from licks with S 8.5%. Neither difference was significant. For sheep grazing fodder fertilized with N 84 kg/ha, licks with 18% S giving intake 1.27 g/day increased gain significantly by 32% in 6 weeks, but gypsum fertiliser providing S 21 kg/ha made no difference. For sheep grazing fodder fertilised with N 84 or 168 kg/ha, licks with 8.5% S providing 0.82 g daily increased gain by 88% with the higher rate of N or by 58% overall, in 3 weeks, but the difference was not significant with the lower rate alone of N, and gypsum made no difference. Induced S deficiency may be suspected when sheep do not gain on young Sorghum spp. of high HCN content. HCN in the study was lower than is frequently reported. S supplements might reduce susceptibility of stock to cyanide poisoning.ADDITIONAL ABSTRACT:A significant proportion of the S ingested by animals grazing Sorghum spp. may be utilized to detoxify HCN liberated after the forage has been ingested. In 1973, young sheep grazing a sorghum X Sudan grass hybrid were given access to salt licks containing <0.1% (control) or 18% S; in 2 experiments the liveweight responses to S were 32% and 18%. In 1974 sheep grazing herbage given 84 kg N/ha and with access to licks containing 8.5% S gained 32% more liveweight than controls with 0.1% licks. Those given S on herbage receiving 168 kg N/ha gained 88% more. Gypsum applied as a fertilizer (0 or 21 kg S/ha) did not affect the response

Item Type: Article
Author Affiliation: CSIRO Division of Animal Physiology, Pastoral Research Laboratory, Armidale, NSW 2350, Australia
Subjects: Animal Husbandary
Divisions: Sorghum
Depositing User: Ms K Syamalamba
Date Deposited: 01 Aug 2012 05:54
Last Modified: 01 Aug 2012 05:55
URI: http://eprints.icrisat.ac.in/id/eprint/7092

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