| Autor: |
Kennedy, L. G., Mitchell, G. E., Little, C. O. |
| Zdroj: |
Journal of Animal Science; February 1971, Vol. 32 Issue: 2 p359-363, 5p |
| Abstrakt: |
A series of experiments was conducted to study the influence of different sources and levels of supplemental sulfur on in vitrostarch digestion by washed rumen microorganisms. Results of studies conducted at a sulfur level (10 µg/ml) previously reported to be near the lower limit of the requirement for cellulose digestion suggested little difference in availabilities of inorganic sources but a lower availability for methionine. In subsequent studies, the sulfur requirement for starch digestion appeared to be substantially lower than reported requirements for cellulose digestion. In simplified medium the added sulfur requirement appeared to be 2 to 2.5 µg/ml from Na2S2O3, 1 to 2 µg/ml from Na2SO4and 1.5 to 1.75 µg/ml from methionine. In complex medium the added sulfur requirement from Na2SO4appeared to be 3 to 5 µg/ml, suggesting mineral interrelationships which increase the requirements. Levels of sulfur as high as 11,000 µg/ml failed to cause significant toxicity in either medium. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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