Effect of fibrolytic enzyme supplementation of urea-treated wheat straw on nutrient intake, digestion, growth performance, and blood parameters of growing lambs

Growth Performance and Serum Metabolites of Awassi Lambs Fed Wheat Straw Treated with Urea and Supplemented with Fibrolytic Enzymes

“…Numerical decreases on SUN in Awassi lambs fed combination of urea-treated wheat straw plus supplemented with fibrolytic enzyme as compared to other treatments, this may be to the better utilization of the diet by lambs. These results are in accordance with results reported by [10,20,28,29].…”

“…Regarding growth performance, Results revealed that total weight gain (TWG) and average daily gain (ADG) were significantly increased (P≤0.01) with lambs fed a combination of urea treatment and enzyme supplementation (T4) as compared to those fed urea treatment (T2) supplementation with fibrolytic enzymes(T3) and untreated wheat straw (T1). This result agreed with the results reported by [7] and [20]. In the current study, urea treatment (T2) alone and enzyme supplementation (T3) alone had numerical increase in TWG and ADG as compared with control (T1).…”

“…Results revealed there were no significant differences in dry matter intake expressed as g/day or g/kgW0.75 for lambs fed an experimental diet. Similar findings were also reported by [20] in lambs fed urea treated wheat straw and supplementing with exogenous fibrolytic enzymes (Dyadic international, 1:1 of Cellulase:Xylanase) and combination of urea treated wheat straw plus supplemented with fibrolytic enzymes, with 50:50 roughage to concentrate diet not improve feed intake when expressed as g/kgW0.75. [21] and [9] also reported that application different methods of applying fibrolytic enzymes (Farmazyme® direct fed enzyme or pre-ingestive of barley straw) did not improve feed intake in Awassi lambs and Shami goats.…”

Effect of Urea-Treated and Untreated Wheat Straw with or Without Fibrolytic Enzyme Addition on Nutrient Digestibility and Rumen Fermentation of Awassi Lambs

“…Regarding the no significant effect of urea treatment (T2) as compared to control (T1) on rumen fermentation, it may be because urea treatment of wheat straw alone does not affect dry matter digestibility or other nutrient digestibility (Table 2). Similar results were reported by [21,22] who found that urea treatment has no significant effect on ruminal pH or NH 3 -N. Regarding to the no significant difference on total volatile fatty acids (TVFAs) in lambs fed with fibrolytic enzymes (T2), it may be because the fibrolytic enzymes used in the current study did not change the diversity of the ruminal microbial community enough to affect TVFA concentration. The exogenous fibrolytic enzymes have limited activity [8].…”

Comparative production performance and rumen bacterial diversity of fattening beef cattle supplemented with different levels concentrated feed

“…In many feedlots, adding additives to the basal diet of ruminants is a practical way to increase production. To improve production performance, management and improvement of rumen fermentation have always been the goals of ruminant research (Dias et al 2021;Jihene et al 2022;Várhidi et al 2022). The addition of concentrate provides more energy for the growth of ruminants (Hill et al 2008).…”