Effect of heat and formaldehyde treatment alone and in combination on in situ dry matter and nitrogen disappearance of some protein sources

Abstract

The effect of formaldehyde and heat treatment alone or in combination on nitrogen and dry matter disappearance was studied using 3 fistulated adult male goats maintained on basal diet of moth chara. The experimental feeds used were guar-meal (GM), soybean-meal (SBM), sunflower-cake (SFC) and fish-meal (FM); control consisted of untreated feeds (T₁), while to protect the protein from microbial degradation, feeds were treated with formaldehyde @ 1.5 g/100 g CP (T₂). heated at 150°C for 2 hr (T₃) and treated by combination of above (T₄) The extent of dry matter and nitrogen disappearance was determined by in situ polyester bag technique. The individual feeds were incubated in rumen for 2. 4, 6, 8, 10, 12, and 24 hr. T₄ groups showed maximum reduction in nitrogen, disappearance followed by T₂, T₃ and T₁ respectively.