NUTRIENT CONTENT AND ORGANIC MATTER DEGRADABILITY OF DIFFERENT MORPHOLOGICAL PARTS OF MAIZE HYBRIDS DENT AND DENT X FLINT
2016
Mlyneková, Z. | Čerešňáková, Z. | Rajský, M.
The aim of our study was to determine the nutrient content and organic matter degradability of different morphological parts (whole plants, stalks, leaves) of maize hybrids dent and dent x flint. Ruminal degradability was determined by in sacco method. Hybrids dent x flint - Mesnil, Chambord, Queen, and hybrids dent - Aude, Meridien, KX 1393, Omero were used.The content of ADF, NDF and lignin in the stalks was higher in the dent than in dent x flint hybrids. Concentration of crude protein (CP) in leaves was two times higher than in stalks (117.0 g.kg-1 DM and 53.0 g.kg-1 DM on average, respectively). The differences were also noted in CP among the hybrids in all plant parts. Large differences were found in starch content among the hybrids in whole plants: in Mesnil it was 329.0 g.kg-1 of DM, whereas in Meridien the starch content was 193.0 g.kg-1 of DM only.In sacco experiment was carried out on three rumen cannulated cows. Hybrids dent x flint had on average higher effective organic matter degradability in whole plants (56.1 %), stalks (38.8 %) and leaves (49.2 %) than hybrids dent (53.8 %, 35.2 % and 43.3 %). Also, the rate of degradation of organic matter (OM) was higher for hybrids dent x flint than for dent. Organic matter in the stalks was degraded more slowly than in leaves.
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