Presenter Information

Raymond Jones, AFRC

Publication Date

1993

Description

Unwilled ryegrass crops (151 kg DM) were enslled in 70-t bunker silos. Crop analysis (g/kg/DM) was water-soluble carbohydrates 153, nitrogen 24.1 and predicted digestibility (DOMD) 0.67. Molassed sugar beet feed pellets were incorporated at a rate of 25 kg/t in the harvested crop with or without inoculant treatment ("Live Systems", MMB, UK), and compared with a control silage with no additive. Absorbent addition with or without inoculant significantly reduced silage pH and ammonia-N compared with the control. Inoculant treatment further increased lactic acid content. Silage effluent production was reduced by up to 33% by absorbent inclusion with effluent DM losses reduced by up to 57%. The non-inoculated silages were fed ad lib. for 57 days to Charolais steers. Significal)t increases in silage DM intakes were observed as a result of absorbent inclusion and live-weight gains of the group fed absorbent silage were significantly higher from those fed untreated silage with a daily supplement of molassed sugar beet.

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Effect of Inoculants and Absorbents Incorporated in Grass Silage on Silage Quality, Effluent Production and Animal Performance

Unwilled ryegrass crops (151 kg DM) were enslled in 70-t bunker silos. Crop analysis (g/kg/DM) was water-soluble carbohydrates 153, nitrogen 24.1 and predicted digestibility (DOMD) 0.67. Molassed sugar beet feed pellets were incorporated at a rate of 25 kg/t in the harvested crop with or without inoculant treatment ("Live Systems", MMB, UK), and compared with a control silage with no additive. Absorbent addition with or without inoculant significantly reduced silage pH and ammonia-N compared with the control. Inoculant treatment further increased lactic acid content. Silage effluent production was reduced by up to 33% by absorbent inclusion with effluent DM losses reduced by up to 57%. The non-inoculated silages were fed ad lib. for 57 days to Charolais steers. Significal)t increases in silage DM intakes were observed as a result of absorbent inclusion and live-weight gains of the group fed absorbent silage were significantly higher from those fed untreated silage with a daily supplement of molassed sugar beet.