In situ Rumen Degradation Characteristics of Maize, Sorghum and Sorghum-Sudan Grass Hybrids Silages as Affected by Stage of Maturity
الموضوعات :ن. کیلیکالپ 1 , اچ. هیزلی 2 , م. سومرلی 3 , ن. آوسی 4
1 - Department of Animal Science, Faculty of Agriculture, Gaziosmanpaşa University, Tokat, Turkey
2 - Agricultural Research Institute of East Mediterranean, Adana, Turkey
3 - GAP International Agricultural Research and Training Center, Diyarbakır, Turkey
4 - Department of Crop Science, Faculty of Agricultural Science and Technologies, Ömer Halisdemir University, Nigde, Turkey
الکلمات المفتاحية: Maize, metabolizable energy, Sorghum, harvesting stage, rumen degradation characteristics, sorghum x Sudan grass hybrids,
ملخص المقالة :
This research was conducted to investigate in situ degradation characteristics of maize, sorghum and sorghum-Sudan grass hybrids. whole plant of maize (TTM-815, DK-711), sorghum (SS-506, FS-5) and sorghum × Sudan grass hybrids (P-988, Grazer N2) were grown under semi-arid conditions and harvested at different maturity stages (mid-flowering (MF), milk-line (ML) and hard-dough (HD)) and ensiled. Three replicate silage samples were incubated at 0, 12, 24, 36, 48, 72 and 96 h. in three rumen fistulated Holstein heifers. Effects of species had a large impact on rumen degradation characteristics values (a, b, (a+b), c), effective dry matter degradability (EDMD) and metabolizable energy (ME) MJ/kg for maize (M), sorghum (S) and sorghum × Sudan grass hybrids (SSH) silages. Effective dry matter degradability (EDMD2) of dry matter was found as 286.65, 259.37, 265.0 g/kgfor species silages, respectively (P<0.0001). Acid detergent fiber (ADF) was found to be the best single predictor of effective dry matter degradability of sorghum × Sudan grass hybrids silages (P<0.05, R=0.448).
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