Study on the dry matter digestibility of domestic herbage by pepsin-cellulase technique, 1; cell wall constituents and dry matter digestibility of wild grasses
1989
Kim, D.J. | Kim, Y.K. (Donga Univ., Pusan (Korea R.). Coll. of Agriculture) | Maeng, W.J. (Konkuk Univ., Seoul (Korea R.). Coll. of Animal Husbandry)
The change of the chemical components and dry matter digestibilities of wild grasses (Agropyron tsukushicense, Digitaria sanguinalis, Arundinella hirta, Miscanthus sinensis, Spodiopogon sibiricus, Setaria viridis and Carex) grown in the mountainous area, Kyunsangnamdo province was determined by advanced stage of maturity. Samples were dried at 70deg C for 24hrs and ground to pass a 1-mm screen. Samples were subjected to the determination of the crude protein (Nx6.25), crude ash, neutral detergent fiber (NDF), acid detergent fiber (ADF), acid detergent lignin (ADL), and dry matter digestibility (DMD) by pepsin-cellulase technique. The energy values (total digestible nutrients, TDN; digestible energy, DE; metabolizable energy, ME) were calculated by DMD of pepsin-cellulase technique. The crude protein of wild grasses were below 10 % with the exception of Digitaria sanguinalis and the crude protein had a tendency to decrease by advanced stage of maturity. The crude ash of wild grasses ranged 5.20 %-12.13 % and the crude ash was not significantly different by advanced stage of maturity. The NDF of wild grasses ranged 58.66 %-79.55 % and the NDF increased by advanced stage of maturity (p0.05). The ADF of wild grasses ranged 33.04 %-45.74 % and the ADF increased by advanced stage of maturity (p0.05). The ADL of wild grasses ranged 3.35 %-8.33 % and the ADL increased by advanced stage of maturity (p0.05). The DMD of wild grases ranged 36.15 %-64.14 % and the DMD decreased by advanced stage of maturity (p0.05). The calculated energy (TDN, DE, and ME) values of wild grasses decreased by advanced stage of maturity. Regression equation and correlation coefficients of wild grasses between DMD (Y) and crude protein content (X) were Y
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