The determination of energy levels in some grains used in ruminant diets by Nylon Bag Technique
2003
Denek, N.(Harran Univ., Faculty of Veterinary Medicine, Sanliurfa (Turkey)) Deniz, S.(Yuzuncu Yil Univ., Faculty of Veterinary Medicine, Van (Turkey))
The aim of this study was to determine dry matter (DM) degradabilities and energy contents of some cereal grains commonly used in ruminant nutrition by Nylon Bag Technique. Thereby, six samples (collected from different regions) of corn, barley, wheat, rye, oat and triticale were used in study. Each samples in dublicate were incubated in the rumen of three fistulated rams for 2,4,16,24 and 48 hours. Majority of DM was degraded in barley, wheat, rye, oat and triticale (73.16%, 80.70%, 81.66%, 65.17% and 75.87% respectively), but DM degradability of corn was slower and 35.00% after 2h incubation. Dry matter degradability of corn consistently continued until 48-h incubation time and was 86.62% after 48 h incubation. Dry matter degradabilities of barley, oat and triticalealso continued until 48 h incubation time and were 87.78, 72.58 and 93.76% respectively after 48 h incubation. Dry matter degradabilities of wheat (90.73%) and rye (91.04%) reached the peak level after 16 h incubation.Digestible and metabolizable energy values of samples were correlated with DM and OM degradabilities. Energy values reached the peak level in which DM degradabilities reached the peak levels, and energy values did not differ afterwards. Metabolizable energy values were 13.90 MJ/kg DM for corn, 13.55 MJ/kg DM for barley, 11.25 MJ/kg DM for oat and 14.47 MJ/kg DM for triticale based on 48 h incubation; 13.68 MJ/kg DM for rye based on 24 h incubation; and 13.55 MJ/kg DM for wheat based on 16 h incubation
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