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    • Irish Journal of Agricultural & Food Research
    • IJAFR, volume 45, 2006
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    Changes in yield and composition of barley, wheat and triticale grains harvested during advancing stages of ripening

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    Author
    Stacey, Pamela
    O'Kiely, Padraig
    Hackett, Richard
    Rice, B.
    O'Mara, Frank P.
    Keyword
    Cereal grain
    ensilability
    nutritive value
    ripening
    Date
    2006
    
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    URI
    http://hdl.handle.net/11019/596
    Citation
    P. Stacey, P. O’Kiely, R. Hackett, B. Rice and F.P. O’Mara. Changes in yield and composition of barley, wheat and triticale grains harvested during advancing stages of ripening. Irish Journal of Agricultural and Food Research 45: 197–209, 2006
    Abstract
    This study involved an evaluation of the changes in grain yield, nutritive value, ensilability and harvesting losses of intensively managed winter cereals harvested during the advancing stages of ripening. Five cereal crops (barley cv. Regina and wheat cv. Madrigal in 2001; barley cv. Regina, wheat cv. Falstaff and triticale cv. Fidelio in 2002) were assessed. Twenty plots per crop were arranged in a randomised complete block design, with five times of harvest (four for barley in 2002) and four replicate blocks per harvest. Dry matter (DM) yields changed relatively little between harvest dates, but fresh yields declined (P < 0.001) over time due to the moisture loss associated with ripening. Time-course changes in indices of nutritive value, such as concentrations of crude protein, starch and ash, and organic matter digestibility, were relatively small and did not follow a consistent pattern. Ensilability indices, such as DM and watersoluble carbohydrate concentrations and buffering capacity, indicated that satisfactory fermentations were likely if such crops were ensiled; buffering capacity, generally declining with advancing maturity. Harvesting losses were not clearly related to growth stage at harvest. It is concluded that winter cereal grain (barley, wheat and triticale) DM yields and quality were relatively constant as ripening progressed from DM concentrations of around 550 to >800 g/kg.
    Funder
    Teagasc Walsh Fellowship Programme
    Collections
    Crop Science
    Grassland Science
    IJAFR, volume 45, 2006
    IJAFR, volume 45, 2006
    IJAFR, volume 45, 2006

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