Recent studies (2,3, 6) indicate that forage digestibility may be predicted from rapid, inexpensive laboratory determinations.Since most of the current laboratory methods for predicting digestibility are based on studies involving hay, it was decided to test the efficacy of various methods in predicting the digestible dry matter (DD~) of silages. EXPERI)~[ElqTAL PROCEDURESSix laboratory evaluation methods were chosen for study: I. Cellulose digestion in the artificial rumen was measured as previously described (2).II.Dry matter loss was measured, using the same artificial rumen system.After the 24-hr fermentation period, the contents of each flask were filtered through crude fiber cloth in a Biichner funnel.The residue on the cloth was transferred to a tared beaker, dried, and weighed.Per cent dry nmtter loss in vitro was calculated, using the following equation :
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Simkins et al. (1963) studied this question.
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