Enzyme Complex Added to Broiler Diets: Effects on Performance, Metabolizable Energy Content, and Nitrogen and Phosphorus Balance (original) (raw)
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The use of enzymes as additives in broiler chicks diets
Veterinaria Mexico, 2002
SE REALIZARON DOS EXPERIMENTOS CON LA FINALIDAD DE EVALUAR EL USO DE ENZIMAS (ALFA-AMILASAS, XILANASAS Y PROTEASAS) COMO ADITIVOS EN DIETAS PARA POLLOS DE ENGORDA SOBRE EL COMPORTAMIENTO PRODUCTIVO. EN EL PRIMER EXPERIMENTO SE EMPLEARON 1000 POLLOS MIXTOS DE UN DIA DE EDAD DE LA ESTIRPE PETERSON. EL ESTUDIO CONSTO DE CUATRO TRATAMIENTOS: A) DIETA TESTIGO(MAIZ); B) DIETA TESTIGO; C) DIETA DE MENOR CONTENIDO (3%) DE PROTEINA CRUDA (PC) Y ENERGIA METABOLIZABLE (EM); Y D) DIETA CON MENOR CONTENIDO (3%) DE PC Y EM ENZIMAS. CADA TRATAMIENTO CONTO CON CINCO REPETICIONES DE 50 POLLOS CADA UNA. EL SEGUNDO EXPERIMENTO FUE SIMILAR AL PRIMERO, PERO LAS DIETAS SE APLICARON CON BASE EN SORGO. SE EMPLEARON 840 POLLOS DE UN DIA DE EDAD DE LA ESTIRPE ARBOR ACRES. CADA TRATAMIENTO CONTO CON SIETE REPETICIONES DE 30 POLLOS CADA UNA. EN AMBOS EXPERIMENTOS SE UTILIZO UN DISENO AL AZAR, CON ARREGLO FACTORIAL 2X2; UN FACTOR FUE EL CONTENIDO DE PC Y EM DE LAS DIETAS Y EL OTRO FACTOR, LA ADICION O NO DE ENZ...
Dietary Enzyme Supplementation on Broiler Performance from 1 Up to 42 Days of Age
2012
Poultry feed industry has been searching for efficient enzymes to improve feed utilization. A performance trial was conducted to evaluate the effect of an endo-1,4-sarabinoxylanase and endo-1,4-s-glucanase containing enzyme formulation (NSPE) in combination with various dosages of a fungal 3- phytase (Phy) in order to show in male Cobb broiler a nutritional value of the enzyme combination. Broiler were housed in floor pens from day 1 up to 42 of age and submitted to four treatments: T1 = Control diet; T2 = Negative Control (reduced by 130 kcal of AMEn; 0,10% Ca and 0,13% P avail); T3 = T2 with 50 g/T of NSPE and 500 FTU/kg Phy; T4 = T2 with 100 g/T of NSPE and 1000 FTU/kg Phy. Corn/soybean meal based mash feed was offered ad libitum by four phase feeding regime. After 42 days no difference was observed for feed intake (P> 0,12). T3 and T4 were not significantly different from T1 for body weight and body weight gain, but were significantly superior to T2. Feed conversion ratio of ...
Semina: Ciências Agrárias, 2021
Three experiments were carried out to verify the effects of the enzyme phytase, alone or combined with an enzyme complex, in diets deficient in available phosphorus (AP), calcium (Ca), and metabolizable energy (ME) on broiler performance, ME, and dietary amino acid digestibility. A total of 1,538 male Cobb 500 broilers were allocated to the three experiments, each of which consisted of five treatments: positive control (PC; basal ration); negative control 1 (NC1; PC minus 0.15% of AP, 0.16% of Ca, and 68 kcal kg-1 ME); negative control 2 (NC2; PC minus 0.15% of AP, 0.16% of Ca, and 101 kcal kg-1 of ME); NC1 plus phytase; and NC2 plus phytase plus enzymatic complex. Body weight gain (WG) and feed intake were measured from 1-21 days and from 1-42 days, and the corrected feed conversion rate (FCR) for mortality was calculated. In the second and third experiments, the apparent ME corrected for nitrogen balance (AMEn) and standardized digestibility of amino acids, respectively, were dete...
Pakistan Journal of Botany, 2009
An experiment was conducted to evaluate the efficacy of multi enzyme in broiler diets containing varying levels of sunflower meal and crude fiber. Sixteen isonitrogenous experimental diets were prepared using 0, 5, 10 and 15% SFM and 4, 5, 6 and 7% CF, respectively with and without enzyme supplementation and fed to 480 day old broiler chicks. Data on feed consumption, weight gain, feed conversion ratio and dressing percentage was collected. Results showed significant differences (p<0.05) among different experimental diets for weight gain and feed conversion. The highest weight gain was observed in chicks fed on diet containing 10% SFM and 6% CF with Grindazym while the lowest weight gain was obtained on diet having 10% SFM and 6% CF without enzyme supplementation. Diet containing 15% SFM and 7% CF with NIBGE enzyme @1% of 2.5 Fold was found best on the other hand diet containing 5% SFM and 5% CF without enzyme supplementation had poorest feed conversion among all the experimental diets. Feed intake during the experimental period was not influenced (p>0.05) either by dietary SFM and CF level or enzyme supplementation. However, maximum feed was consumed by birds fed diet containing 5% SFM and 5% CF without enzyme supplementation. While the minimum feed intake was observed on diet formulated with 15% SFM and 7% CF without addition of any enzyme. Dressing percentage was calculated as carcass weight excluding skin including internal organs viz., heart, liver, gizzard and kidneys of the birds. No differences (p>0.05) were observed for dressing percentages on different experimental diets. Results from this experiment suggest that enzyme supplementation can improve nutritive value of high fiber broiler diets. Broiler chicks can grow faster and more efficiently on a diet containing fiber degrading enzymes than on a diet without enzymes.
Enzymatic programs for broilers
Brazilian Archives of Biology and Technology, 2009
Two trials were conducted on floor pens to evaluate the performance of broilers fed with diets contained different carbohydrases enzyme programs at different ages. Trial 1- The body weight gain (BWG) was affected by the Negative Control (NC) treatment (P<0.05). However, when the birds were fed with the NC diet + Amilase (AMY)+Xilanase (XYL), the BWG improved and reached the same level as the Positive Control (PC). Trial 2- The birds received enzymes supplementation in the total phase and others only in the grower phase.The ME reduction by 120 kcal/kg increased the feed conversion ratio (FCR) (P<0.05) when compared to PC and none of the enzyme programs was able to recover the performance. It can be concluded that it is possible to supplement with AMY during the role period of broiler chicken life or use an enzymatic program with AMY or AMY+XYL only in the grower phase.
Effect of enzymes on performances of broiler chickens
Biotehnologija u stocarstvu, 2008
Objective of this research was to investigate the effect of addition of enzyme complex to diets of different nutritive value on performance of broiler chickens. In this trial 1200 chickens of Cobb 500 hybrid divided into 4 treatments with 8 repetitions were used: 1. Positive control; 2. Positive control with addition of 0,02% of enzyme complex; 3. Negative control (contains 0,3 MJ of energy, 0,1% of accessible P and 0,1% Ca less compared to group 1); 4. Negative control with addition of 0,02% of enzyme complex. Application of enzyme preparation resulted in positive effects on gain and feed conversion, regardless if it was added to standard mixtures or mixtures of diminished nutritive value. Economical analysis of obtained results showed that improvement realized by application of enzyme preparation exceeds costs of its application.
Effect of Multi-Enzymes Supplementation on Growth Performance of Broiler
2014
Non-starch polysaccharides (NSPs) are not fully digested by broiler's endogenous enzymes and consequently the soluble NSPs in feed results in high digesta viscosity and poor retention of nutrients. Supplementation of NSPs digesting enzymes may release the nutrients from feed and reduce the anti-nutritional effects of NSPs. The present study was conducted to determine the effects of NSPs digesting enzymes (Zympex) in broiler chicks. A total of 120 day old broiler chicks (Hubbard) were categorized into 3 treatments and each treatment was having four replicates comprised of 10 chicks in each. Dietary treatments comprised of Basal diet (2740 KCal/kg) as control-1 (T1), low energy diet (2630 KCal/kg) control-2 (T2) and low energy diet with 0.5 gm/kg enzyme as T3. Multi-enzymes supplementation showed significant (P 0.05), feed consumption was significantly lower (P<0.05) in 5 th week and results showed poor FCR (P<0.05) in 2 nd , 3 rd and 4 th week but non-significant effect in ...
Using Enzymes and Organic Acids in Broiler Diets
The Journal of Poultry Science, 2010
Broiler industry has been bridging the gap between the supply and demand of high quality protein foods such as meat for the ever increasing human population worldwide. However, the overall expenditure on broiler diets remains between percent of the total cost of broiler production. Therefore, the broiler industry has been striving to reduce the cost of production through improved feed utilisation by the broilers. For this purpose, exogenous enzymes have been claimed to improve the utilization of feeds by maximising the conversion of dietary nutrients into broiler meat, for example. Enzymes not only help in formulating more balanced diets for broilers by increasing the choice of ingredients such as cereals and other agro-industrial by-products but also by increasing their e ciency of utilisation by enhancing the digestibility of fibrous materials. The enzymes can also be beneficial as growth promoters instead of antibiotics which are banned in the European Union. Enzymes have been tried alone and in combinations with other additives such as organic acids to maintain health and production of broilers. Although the role of enzymes in improving feed utilisation, growth, meat quality and economics has been well reported, their quality, consistency and reproducibility have been questioned by many researchers. This article reviews the role of enzymes alongside organic acids in broiler diets and their future potential to maintain bird health and e cient broiler production which has desirable impacts on the environment.