Ensiling grass with straw. I. Effect of straw, cellulase enzyme and urea on chemical composition of grass and grass/legume silages

R. C. Jakhmola*, J. R. Weddell, J. F.D. Greenhalgh

*Corresponding author for this work

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In Experiment A, perennial ryegrass (Lolium perenne) and a mixture of perennial ryegrass and white clover (Trifolium repens) (GL), were ensiled in laboratory silos after mixing with shredded barley straw in various proportions (straw, 0, 20 and 40% of dry matter) with or without a cellulase enzyme preparation. In Experiment B, chopped perennial ryegrass was mixed with straw [60:40 on a dry-matter (DM) basis], with or without fertilizer grade urea (2% of straw DM) and enzyme. The GL silages were lower in lactic acid content and higher in pH and ammonia nitrogen than the grass silages. Straw decreased the contents of crude protein, soluble carbohydrate and in vitro digestible organic matter and increased modified acid detergent fibre (MADF) content of silages. Straw also changed the composition of fermentation products by decreasing the ratio between lactic acid and acetic acid in the silage. Urea treatment increased lactic acid production and decreased MADF and hemicellulose. Enzyme treatment had no significant effect on the quality characteristics of either type of silage.

Original languageEnglish
Pages (from-to)39-50
Number of pages12
JournalAnimal Feed Science and Technology
Volume28
Issue number1-2
DOIs
Publication statusPrint publication - Feb 1990

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