Utilization of Feed Enzymes in Laying Hen Rations

Wyatt, C. L.; Goodman, T.

doi:10.1093/japr/2.1.68

Cited by 15 publications

(6 citation statements)

References 9 publications

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“…Many of the earlier studies, with maize as the major energy source in broilers22–24 as well as in layers,25 did not show any significant effect of enzyme supplementation. Mixed‐enzyme preparations in maize–soy‐based broiler diets gave beneficial effects only in one out of three experiments conducted with broilers 26.…”

Section: Discussionmentioning

confidence: 77%

Effects of enzymes in diets with varying energy levels on growth and egg production performance of Japanese quail

et al. 2004

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The present study was conducted to evaluate the effect of feed-grade enzyme supplementation in diets with varying levels of energy on the performance of growing and laying Japanese quails. Day-old Japanese quails, 504 in number, were subjected to six dietary treatments with six replicates at each treatment. Each replicate had 14 chicks. The dietary treatments consisted of three energy levels ie 12.15 MJ (2900 kcal), 11.30 MJ (2700 kcal) and 10.48 MJ (2500 kcal) ME kg −1 diet and two enzyme levels (0 and 0.5 g kg −1 diet). A metabolism trial was conducted at the fourth week of age. At the end of week 5, 10 quails (five of each sex) per treatment were sacrificed for carcass characteristics and 20 female quails from each of the six dietary groups were housed in individual laying cages and fed respective layer diet to study the laying performance and egg quality up to 20 weeks of age. Body weight gains of quails fed 12.15 MJ or 11.30 MJ ME kg −1 diets were significantly higher (p < 0.01) than those fed diets with 10.46 MJ ME kg −1 diet. Feed intake was significantly lower (p < 0.01) in birds that received diet with 12.15 MJ ME kg −1 than in birds that diets containing either 11.30 or 10.46 MJ ME kg −1 diet. Feed conversion ratio (p < 0.01) was best at 12.15, followed by 11.30 and 10.46 MJ ME kg −1 diet. Enzyme supplementation did not improve the growth performance, feed intake or feed conversion efficiency of quails. Enzyme addition also did not influence nitrogen retention or energy or dry matter metabolizability. The carcass characteristics did not differ because of energy or enzyme supplementation. Feed intake increased significantly (p < 0.01) as the dietary energy level decreased. The egg production and quality characteristics remained almost similar in all the dietary treatments. It was concluded that the optimum dietary energy level for quail was 12.15 MJ (2900 kcal) ME kg −1 during the growing phase and 11.30 MJ (2700 kcal) ME kg −1 during the laying phase. Addition of feed enzymes to conventional diets containing varying levels of maize, soyabean meal, fish meal and deoiled rice bran was not beneficial to improve growth, carcass traits, egg production performance or nutrient utilization.

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Section: Discussionmentioning

confidence: 77%

Effects of enzymes in diets with varying energy levels on growth and egg production performance of Japanese quail

et al. 2004

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“…The month of egg production is another factor that affects the response of layers to enzyme supplementation (Jeroch et al 1995). Wyatt and Goodman (1993) reported that enzyme supplementation might be beneficial during peak production because laying hens require higher levels of nutrients to maintain body growth and high egg production.…”

Section: Discussionmentioning

confidence: 99%

Performance of laying hens fed wheat, wheat-barley or wheat-barley-wheat bran based diets supplemented with xylanase

Mathlouthi¹,

Larbier²,

Marrakchi³

et al. 2002

Can. J. Anim. Sci.

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Abbreviations: AME, apparent metabolizable energy; CF, crude fat; CP, crude protein; DM, dry matter; IU, international unit; ME, metabolizable energy; NSPs, non-starch polysaccharides; TME, true metabolizable energy; W, wheat-based diet; WB, wheat and barley-based diet; WBB, wheat, barley and wheat bran-based diet [193][194][195][196][197][198][199]. Two experiments were conducted to study the response of laying hens to a commercial enzyme preparation (Safizyme XP20) containing 70 000 IU g -1 xylanase. In the first experiment, 270 laying hens (ISA Brown), aged 28 wk, were fed basal diets of wheat (W), wheat-barley (WB) or wheat-barley and wheat bran (WBB) without xylanase, or supplemented with 1400 IU xylanase kg -1 in 3 × 2 factorial arrangement. In the second experiment, 180 ISA Brown laying hens, aged 28 wk, were assigned to 2 × 2 factorial arrangement and fed wheat-based diets containing 2753 or 2653 kcal metabolizable energy (ME) kg -1 without xylanase, or supplemented with 1400 IU xylanase kg -1 . Egg production (% hen-day), egg weight, egg mass, feed conversion ratio and changes in body weight were recorded for 12 wk. The effects of xylanase on true metabolizable energy (TME) values of wheat, barley and wheat bran were determined using roosters. Layers fed W-, WB-or WBB-based diets had similar egg mass. The feed conversion ratio of layers fed the WBB-based diet was better (P ≤ 0.05) than that of the other groups. Xylanase improved (P ≤ 0.05) egg mass of layers fed W-or WB-based diets, but it did not affect the performance of hens fed the WBB-based diet.Low dietary ME significantly (P ≤ 0.05) reduced the performance of laying hens. Xylanase supplementation improved (P ≤ 0.05) egg production, egg mass and feed conversion ratio of layers fed the low energy diet. It did improve the feed conversion ratio of layers fed the high-energy diet. Addition of 1400 IU xylanase kg -1 to the low-energy diet was equivalent to an increase of at least 100 kcal ME kg -1 . Xylanase increased (P ≤ 0.05) the TME values by 5.2 and 2.44% for wheat and barley, respectively, and did not affect the TME value of wheat bran.

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“…There was no significant effect of the experimental treatments on DMI (g/d) and CP digestibility, while digestibility coefficients of DM, OM, CF, EE, NFE, NDF, ADF and hemicellulos were increased (P≤0.05) with feeding on the treatments designated as T8 and T9 than the other rations as shown in Table )2(. Wyatt and Goodman (1993) reported that YC-based diet exhibited better feed efficiency than those fed enzyme supplemented barley-based diets. Microbes also have the ability to metabolize xylan and pectin (De Blas and Gidenne, 1998).…”

Section: Effect Of Dietary Yc Level By Feed Supplements Interactionmentioning

confidence: 99%

Replacement of Dietary Yellow Corn by Wheat Bran With or Without Multi-Enzymes or Prebiotic Supplementation on Nutrient Digestibility and Blood Parameters in Growing Rabbits

El-Maaty

Aziz

Dorra

et al. 2019

Egyptian Journal of Nutrition and Feeds

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he present study was performed to investigate the influence of feeding diets contained three levels of yellow corn (YC) without or with enzymes and/or prebiotics on the nutrient digestibility and blood parameters of growing New Zealand White (NZW) rabbits. A feeding trial (3x4) with factorial arrangement of treatment was carried out. The chemical analyses for experimental diets and faces and blood constituents were run. One hundred and eight, 6 weeks old weaning NZW rabbits were used in this study. Rabbits were randomly distributed into 12 equal experimental groups; each contained three equal replicates. The digestibility coefficients of dry matter (DM), organic matter (OM), crude fiber (CF), ether extract (EE), nitrogen free extract (NFE), non-ditrgant fiber (NDF), ADF and hemicellulose were increased with feeding on 15 % YC diets than those of rabbits fed on 5 % or 10 % YC rations, but there was no significant effect of dietary treatments on DMI and CP digestibility. Rabbits fed enzyme-supplemented diets displayed significantly lower DM, OM, CF, EE, NFE, NDF, ADF and hemicellulose than those of other dietary treatments. There was no significant effect of these supplements on DMI (g/d) and CP digestibility, compared with the control diet (without supplements). The digestible DCP (%), TDN% and DEI (kcal/d) were significantly higher (P≤0.05) for animals fed diets containing 15 % YC than feeding on 5 or 10 % YC diets, while there were no significant effect on TDNI (g/d), CPI (g/d) and DEI (kcal/d). Rabbits fed the enzyme-supplemented diets exhibited significantly lower TDN (%) and DE (kcal/kg) than did those fed other experimental diets. Similarly, significantly lower means of DEI (kcal/d) were recorded by rabbits fed enzyme-or enzyme plus prebiotics-supplemented diets compared with other experimental groups of rabbits, but DCP % and CPI (g/d) were not affected. The plasma levels of triglycerides and total cholesterol were significantly lower for rabbits fed diets with 10 % or 15 % YC than those of rabbits fed the lowest level of YC,, while there was no significant effect on ALT, AST, total protein or urea concentration. Rabbits fed the diets fortified with enzymes plus prebiotics exhibited significantly lower (P≤0.05) levels of plasma urea and triglycerides and significantly higher cholesterol concentration than did the control group. In conclusion, using YC to partially replace wheat bran in growing rabbits diets had no negative effect on the nutritive value of diets. The nutritive value of the experimental diets for growing rabbits could increase by supplementing enzymes plus prebiotics. The present study showed that feeding growing rabbits on diets contained 10 % YC without supplements or feeding on diets contained 15 % YC with enzymes and prebiotics are effective for nutrient digestibility, nutritive value and health status of rabbits.

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Utilization of Feed Enzymes in Laying Hen Rations

Cited by 15 publications

References 9 publications

Effects of enzymes in diets with varying energy levels on growth and egg production performance of Japanese quail

Effects of enzymes in diets with varying energy levels on growth and egg production performance of Japanese quail

Performance of laying hens fed wheat, wheat-barley or wheat-barley-wheat bran based diets supplemented with xylanase

Replacement of Dietary Yellow Corn by Wheat Bran With or Without Multi-Enzymes or Prebiotic Supplementation on Nutrient Digestibility and Blood Parameters in Growing Rabbits

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