Digesta characteristics of dorsal,middle and ventral rumen of cows fed with different hay qualities and concentrate levels |
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| Authors: | M Tafaj B Junck Anja Maulbetsch H Steingass H-P Piepho |
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| Institution: | 1. Institute of Animal Nutrition , University of Hohenheim , Stuttgart , Germany;2. Unit of Bioinformatics , University of Hohenheim , Stuttgart , Germany |
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| Abstract: | The influence of fibre content of hay (H) and concentrate level (C) on local differences in the composition of ruminal digesta (ratio of solid to fluid digesta, DM, NDF, ADF and ADL content), particle size (MPL), specific gravity (SG) and fermentation (pH and concentrations of SCFA and bicarbonate) have been tested on two ruminally cannulated Friesian cows (520?kg BW) which were fed restricted, using individual cows as experimental units. Digesta samples were collected via cannula from three rumen layers: 5 to 10?cm (top) and 25?–?35?cm beneath the top of the particle mat (middle) and 5?–?10?cm above the rumen floor (bottom). For a main plot treatment (H·C), repeated samples were collected at four time intervals (1?h before and 2, 5 and 10?h after morning feeding) on each of two days. From top to bottom rumen the share of solid digesta mass (SM), DM and NDF contents of squeezed digesta fluid (SRF) and concentration of SCFA decreased (P?P?
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| Keywords: | Cows Digesta Stratification Rumen fermentation Hay Concentrate |
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