scholarly journals Standardized Ileal Amino Acid Digestibility of Plant Feedstuffs in Broiler Chickens and Turkey Poults Using a Nitrogen-Free or Casein Diet

2008 ◽  
Vol 87 (12) ◽  
pp. 2535-2548 ◽  
Author(s):  
S.A. Adedokun ◽  
O. Adeola ◽  
C.M. Parsons ◽  
M.S. Lilburn ◽  
T.J. Applegate
2016 ◽  
Vol 6 (1) ◽  
pp. 846-852
Author(s):  
Olugbenga Adeniran Ogunwole ◽  
B. C Majekodunmi ◽  
R. A Faboyede ◽  
D. Ogunsiji

Effects of supplemental dietary lysine and methionine in a Groundnut Cake (GNC) based diets on meat and bone characteristics of broiler chickens were investigated. In a completely randomized design, a total of 168 one - day – old Arbor acre broiler chicks were randomly allocated to seven dietary treatments each in triplicate of eight birds per replicate. The Seven starter and finishers’ diets were: GNC based diets without any amino acid (lysine or methionine) supplementation (T1); GNC diet + 0.2% lysine (T2); GNC diet + 0.4% lysine (T3); GNC diet + 0.2% methionine (T4); GNC diet + 0.4% methionine (T5); GNC diet + 0.2 lysine and 0.2% methionine (T6) and GNC diet + 0.4% lysine and 0.4% methionine (T7). Experimental diets and water were offered to birds ad libitum in an experiment lasting six-week. At day 42, two birds per replicate were slaughtered, meat and bone characteristics determined. There were significant variations (P<0.05) in the crude protein (%) and ether extract (%), pH1 and pH2 of meat. Thiobarbituric acid reactive substances composition of meat at days 0, 5, and 10 were similar (P<0.05) and were not affected by dietary amino acid supplementation. Tibiotarsal index (mg/mm) of bone (22.10, 27.25, 33.35, 31.40, 28.70, 31.45 and 29.75 for broilers on T1, T2, T3, T4, T5, T6 and T7, respectively) were increased significantly (P<0.05) by amino acid supplementation. Significantly differences (P<0.05) were observed in the calcium, phosphorus and potassium (%) contents of broilers’ bone across treatments. Supplemental lysine and both lysine and methionine improved meat quality and bone development of broiler chickens in this study.


2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Sonia Yun Liu ◽  
Shemil P. Macelline ◽  
Peter V. Chrystal ◽  
Peter H. Selle

AbstractThe prime purpose of this review is to explore the pathways whereby progress towards reduced-crude protein (CP) diets and sustainable chicken-meat production may be best achieved. Reduced-CP broiler diets have the potential to attenuate environmental pollution from nitrogen and ammonia emissions; moreover, they have the capacity to diminish the global chicken-meat industry’s dependence on soybean meal to tangible extents. The variable impacts of reduced-CP broiler diets on apparent amino acid digestibility coefficients are addressed. The more accurate identification of amino acid requirements for broiler chickens offered reduced-CP diets is essential as this would diminish amino acid imbalances and the deamination of surplus amino acids. Deamination of amino acids increases the synthesis and excretion of uric acid for which there is a requirement for glycine, this emphasises the value of so-called “non-essential” amino acids. Starch digestive dynamics and their possible impact of glucose on pancreatic secretions of insulin are discussed, although the functions of insulin in avian species require clarification. Maize is probably a superior feed grain to wheat as the basis of reduced-CP diets; if so, the identification of the underlying reasons for this difference should be instructive. Moderating increases in starch concentrations and condensing dietary starch:protein ratios in reduced-CP diets may prove to be advantageous as expanding ratios appear to be aligned to inferior broiler performance. Threonine is specifically examined because elevated free threonine plasma concentrations in birds offered reduced-CP diets may be indicative of compromised performance. If progress in these directions can be realised, then the prospects of reduced-CP diets contributing to sustainable chicken-meat production are promising.


Author(s):  
Xingbo Liu ◽  
Kun Xing ◽  
Ran Ning ◽  
Sergi Carné ◽  
Xingqiang Wu ◽  
...  

Abstract Two experiments were conducted to investigate the effects of a combined α-galactosidase and xylanase preparation on nutrients digestibility and growth performance in broiler chickens. Experiment 1 had 240 broilers allocated to 3 treatments with the dietary supplementation of 0, 300 and 500 g/t of the enzyme combination. Diet and amino acid (AA) digestibility were assessed. Experiment 2 was a 2 × 3 (enzyme × diet) factorial arrangement with 10 replicates of 12 male broilers per replicate. Diets were based on corn-Soybean meal (SBM) diet and had 3 nutritional levels (normal, 2% apparent metabolizable energy (AME) and crude protein (CP) reduction, and 4% AME and CP reduction). Each of these diets was fed with or without enzyme supplementation. Growth performance, chyme viscosity, nutrients digestibility, and endogenous enzymes activity were assessed. In experiment 1, enzyme supplementation improved the digestibility of Ca (P = 0.025) and ileal digestibility of total AA, Pro, Alu, Ile, Lys, His, Thr, Glu, Val, Leu, Tyr and Phe (P &lt; 0.05), and also tended to increase the AME of diets (P &lt; 0.10). In experiment 2, broilers fed the corn-SBM diet with 4% nutrient reduction had better growth performance (P &lt; 0.05), jejunal digesta viscosity at 42 days (P &lt; 0.01), and lower digestibility of gross energy (GE) (P &lt; 0.05) when compared to those fed the normal nutrient diet. Enzyme inclusion increased digestibility of CP (P = 0.044), GE (P = 0.009), raffinose (P &lt; 0.001) and stachyose (P &lt; 0.001), improved average daily gain (P = 0.031), and reduced jejunal digesta viscosity at 42 days (P = 0.011). Besides, similar improvements trend in amylase, trypsin, sucrase, and maltase activity with enzyme inclusion were observed as with energy. These data support that the enzyme supplementation increased nutrients and ileal amino acid digestibility, improved performance and endogenous enzymes activity.


1993 ◽  
Vol 264 (6) ◽  
pp. G1057-G1065 ◽  
Author(s):  
C. Moundras ◽  
C. Remesy ◽  
C. Demigne

The aim of the present study was to evaluate the effect of changes in dietary protein level on overall availability of amino acids for tissues. For this purpose, rats were adapted to diets containing various concentrations of casein (7.5, 15, 30, and 60%) and were sampled either during the postprandial or postabsorptive period. In rats fed the protein-deficient diet, glucogenic amino acids (except threonine) tended to accumulate in plasma, liver, and muscles. In rats fed high-protein diets, the hepatic balance of glucogenic amino acids was markedly enhanced and their liver concentrations were consistently depressed. This response was the result of a marked induction of amino acid catabolism (a 45-fold increase of liver threonine-serine dehydratase activity was observed with the 60% casein diet). The muscle concentrations of threonine, serine, and glycine underwent changes parallel to plasma and liver concentrations, and a significant reduction of glutamine was observed. During the postabsorptive period, adaptation to high-protein diets resulted in a sustained catabolism of most glucogenic amino acids, which accentuated the drop in their concentrations (especially threonine) in all the compartments studied. The time course of metabolic adaptation from a 60 to a 15% casein diet has also been investigated. Adaptation of alanine and glutamine metabolism was rapid, whereas that of threonine, serine, and glycine was delayed and required 7-11 days. This was paralleled by a relatively slow decay of liver threonine-serine dehydratase (T-SDH) activity in contrast to the rapid adaptation of pyruvate kinase activity after refeeding a high-carbohydrate diet.(ABSTRACT TRUNCATED AT 250 WORDS)


1977 ◽  
Vol 37 (1) ◽  
pp. 93-105 ◽  
Author(s):  
Anne U. Gjøen ◽  
L. R. Njaa

1. Young male rats were used in five experiments to study the utilization for growth of methionine sulphoxide, and the relationship between the sulphoxide content in the diet and the level of microbiologically determined methionine activity in blood or blood plasma. In one nitrogen-balance experiment methionine and methionine sulphoxide were compared as supplements to a casein diet and a fish-meal diet.2. Methionine sulphoxide was poorly utilized for growth when tested as the sole sulphur amino acid in an amino acid diet. Substitution of one-third of the sulphoxide with cystine improved utilization so that it approached that of methionine.3. Methionine alone and in combination with methionine sulphoxide were added to a soya-bean-meal diet. The sulphoxide showed no adverse effect on growth.4. Fish meal in which methionine had been oxidized to methionine sulphoxide was tested alone and in combinations with unoxidized fish meal. Only when the oxidized meal was given alone was there an appreciable effect on growth. The fish meals used were low in cystine.5. Whereas both methionine and methionine sulphoxide improved the N balance when a casein diet was given, there was no effect when a fish-meal diet was given.6. There was a linear relationship between methionine sulphoxide content in the amino acid diets and the methionine activity in the blood plasma. Methionine sulphoxide added to a soya-bean-meal diet or present in oxidized fish meal gave a curvilinear relationship, and the observed activities were lower than with the amino acid diets. Methionine activity in blood could not be used as an indicator of moderate amounts of methionine sulphoxide in protein-containing diets.


2016 ◽  
Vol 55 (4) ◽  
pp. 324-334 ◽  
Author(s):  
Peter Haščík ◽  
Lenka Trembecká ◽  
Marek Bobko ◽  
Juraj Čuboň ◽  
Miroslava Kačániová ◽  
...  

Author(s):  
F.I. Vasilevich ◽  
V.M. Bachinskaya ◽  
Yu.V. Petrova

Экспериментальные исследования кормовых добавок Абиотоник и Чиктоник проводили на базе вивария кафедры эпизоотологии и организации ветеринарного дела, а ветеринарносанитарную экспертизу продуктов убоя цыплятбройлеров проводили на кафедре паразитологии и ветеринарносанитарной экспертизы ФГБОУ ВО МГАВМиБ МВА имени К.И. Скрябина и ФГБНУ ФНЦ ВИЭВ РАН, аминокислотный состав мяса перепелов в Государственном бюджетном учреждении Краснодарского края Кропоткинская краевая ветеринарная лаборатория . Из цыплят в суточном возрасте кросса Кобб500 было сформировано три группы по 10 голов в каждой две опытные и контрольная опытным группам выпаивали кормовые добавки из расчета 1 мл/кг живой массы птицы до 50 суток выращивания, убой птицы проводили на 56 сутки. Тушки птицы после 24х часов созревания в холодильной камере при температуре 4 С подвергали исследованиям по общепринятым методикам: ГОСТ Р 519442002. Мясо птицы. Методы органолептических показателей, температуры и массы ГОСТ 314702012. Мясо птицы, субпродукты и полуфабрикаты из мяса птицы. Методы органолептических и физикохимических исследований аминокислотный состав мяса исследовали согласно М 0438 2009. Корма, комбикорма и сырье для их производства. Методика измерений массовой доли аминокислот методом капиллярного электрофореза с использованием системы капиллярного электрофореза Капель. Применение кормовых добавок в дозе 1 мл/кг живой массы способствовало увеличению живой массы птицы при применении Абиотоника на 54,23, а при применении Чиктоника на 37,70 по отношению к контролю. Во всех исследуемых пробах количество ЛЖК находится в пределах нормы и составило: в 1й опытной 1,390,03 мг КОН, во 2й опытной 1,420,04 мг КОН и в контрольной группе 1,810,06 мг КОН, что говорит о свежести и доброкачественности мяса. Значение рН мяса цыплятбройлеров находилось в трех группах в пределах нормы и не превышало 6,0. По результатам проведенных исследований аминокислотного состава красной и белой мышечной ткани цыплятбройлеров было установлено, что применение кормовой добавки Абиотоник способствовало увеличению незаменимых аминокислот на 12,14 и на 22,84 соответственно, а заменимых на 8,11 и на 22,51 по отношению к контрольной группеExperimental studies of feed additives Abiotonik and Chiktonik were conducted on the basis of the vivarium of the Department of Epizootology and Organization of Veterinary, and the veterinarysanitary examination of the products of slaughter broiler chickens was carried out at the Department of Parasitology and VeterinarySanitary Expertise of FSBEI HE MGAVMiB MBA named after KI Scriabin and the FSBI of the Federal Research Center of the VIEW RAS, the amino acid composition of quail meat in the State budget institution of the Krasnodar Territory Kropotkinskaya regional veterinary laboratory. Three groups of 10 animals each were formed from chickens at the daily age of the Cobb500 crosscountry, the experimental groups were fed feed additives at the rate of 1 ml / kg of live weight of poultry for up to 50 days of cultivation, and poultry were slaughtered for 56 days. Poultry carcasses after 24 hours of maturation in a refrigerating chamber at a temperature of 4 C were subjected to research according to generally accepted methods: GOST R 519442002. Poultry meat Methods of organoleptic characteristics, temperature and mass GOST 314702012 Poultry meat, offal and semifinished products from poultry meat. Methods of organoleptic and physicochemical studies) Amino acid composition of meat was carried out according to M 04382009. Feed, feed and raw materials for their production. Methods of measuring the mass fraction of amino acids by capillary electrophoresis using the Cappel capillary electrophoresis system. The use of feed additives in a dose of 1 ml / kg of live weight contributed to an increase in live weight of the bird when using Abiotonics by 54.23, and when using Chictonics by 37.70 relative to the control. In all studied samples, the number of VFAs is within the normal range and amounted to 1.39 0.03 mg KOH in 1 experimental group, 1.42 0.04 mg KOH in 2 experimental groups and 1.81 0.06 in the control group. mg KOH, which speaks of the freshness and goodness of meat. The pH of broiler chicken meat was in three groups within the normal range and did not exceed 6.0. According to the results of studies of the amino acid composition of red and white muscle tissue of broiler chickens, it was found that the use of the feed additive Abiotonik contributed to an increase in essential amino acids by 12.14 and by 22.84, and by replaceable ones by 8.11 and by 22.51 relative to the control group.Экспериментальные исследования кормовых добавок Абиотоник и Чиктоник проводили на базе вивария кафедры эпизоотологии и организации ветеринарного дела, а ветеринарносанитарную экспертизу продуктов убоя цыплятбройлеров проводили на кафедре паразитологии и ветеринарносанитарной экспертизы ФГБОУ ВО МГАВМиБ МВА имени К.И. Скрябина и ФГБНУ ФНЦ ВИЭВ РАН, аминокислотный состав мяса перепелов в Государственном бюджетном учреждении Краснодарского края Кропоткинская краевая ветеринарная лаборатория . Из цыплят в суточном возрасте кросса Кобб500 было сформировано три группы по 10 голов в каждой две опытные и контрольная опытным группам выпаивали кормовые добавки из расчета 1 мл/кг живой массы птицы до 50 суток выращивания, убой птицы проводили на 56 сутки. Тушки птицы после 24х часов созревания в холодильной камере при температуре 4 С подвергали исследованиям по общепринятым методикам: ГОСТ Р 519442002. Мясо птицы. Методы органолептических показателей, температуры и массы ГОСТ 314702012. Мясо птицы, субпродукты и полуфабрикаты из мяса птицы. Методы органолептических и физикохимических исследований аминокислотный состав мяса исследовали согласно М 0438 2009. Корма, комбикорма и сырье для их производства. Методика измерений массовой доли аминокислот методом капиллярного электрофореза с использованием системы капиллярного электрофореза Капель. Применение кормовых добавок в дозе 1 мл/кг живой массы способствовало увеличению живой массы птицы при применении Абиотоника на 54,23, а при применении Чиктоника на 37,70 по отношению к контролю. Во всех исследуемых пробах количество ЛЖК находится в пределах нормы и составило: в 1й опытной 1,390,03 мг КОН, во 2й опытной 1,420,04 мг КОН и в контрольной группе 1,810,06 мг КОН, что говорит о свежести и доброкачественности мяса. Значение рН мяса цыплятбройлеров находилось в трех группах в пределах нормы и не превышало 6,0. По результатам проведенных исследований аминокислотного состава красной и белой мышечной ткани цыплятбройлеров было установлено, что применение кормовой добавки Абиотоник способствовало увеличению незаменимых


Sign in / Sign up

Export Citation Format

Share Document