Biodisponibilidade de diferentes fontes de zinco para coelhos

Ferreira, Walter Motta; Cavalcante, S.G.; Naranjo, A.P.; Santiago, G.S.

doi:10.1590/s0102-09352002000600013

Cited by 5 publications

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“…Zinc in both organic and non-organic forms is generally considered to be allowable for use in the diets of animals for improvement of growth parameters. However, use of high levels of zinc has caused some ecological problems due to low bioavailability of nonorganic zinc in the organism (Ferreira et al, 2002;Alikwe et al, 2011). Moreover, previous studies revealed that non-organic zinc differs by better bioavailability and efficiency in the organism of rabbits.…”

Section: Introductionmentioning

confidence: 99%

Influence of zinc nanoaquacitrate on the immuno-physiological reactivity and productivity of the organism of rabbits

Бойко¹,

Honchar²,

Lesyk³

et al. 2020

Regul. Mech. Biosyst.

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Zinc is necessary for maintaining the immune status, and its deficiency in the organisms of animals is usually accompanied by the condition of immune deficiency. The objective of the study was determining the effect of different amounts of zinc on the immune-biological reactivity and productivity of the organism of rabbits after their weaning on the 50th and 86th days of life. For the study, rabbits with the weight of 1.2–1.4 kg were selected and divided into four groups (control and three experimental). The rabbits of the control group were fed with unlimited balanced granulated compound feed, and had free access to water. The animals of the I, II and III experimental groups were watered with zinc nanoaquacitrate in the amounts of 0.25, 0.50 and 0.75 mg of Zn/kg of body weight. Compared with the control group, watering of the animals of the experimental groups with zinc nanoaquacitrate to a greater extent affected the content of phagocytic activity, lysozymic and bactericidal activities of the blood serum as integral factors of non-specific cellular and humoral resistance of the organism, which manifested in the increase in their content in blood on the 12th, 24th and 36th days of the experiment. Use of organic supplement in the diet of rabbits had a stimulating effect on the functioning of the immune system of their organism, which was seen in the higher content of total immunoglobulins, sialic acids and ceruloplasmin in the blood of animals watered with zinc nanoaquacitrate in the quantities of 0.50 and 0.75 mg of Zn/kg of body weight on the 24th and 36th days of the experiment. Use of organic compound of zinc in the diet caused high parameters of growth of the organism of rabbits during the period of 36 days, which manifested in the highest parameters of average-day increments and body weight on the 86th day of the life of the rabbits from the III experimental group, which received zinc nanoaquacitrate in the amounts of 0.75 mg of Zn/kg of body weight compared with the control group. Watering rabbits with zinc nanoaquacitrate during the study was accompanied by probable changes in the number of erythrocytes, concentration of hemoglobin and erythrocyte indices, which could indicate a positive effect of the employed additives on the hematopoietic function of the rabbits’ organism. The data of the performed experiment suggest that watering with larger amounts of organic compound of zinc has a positive effect on the processes of formation of immuno-physiological reactivity of the rabbits’ organism and increase in their productivity. The practical purpose is the study of the impact of watering with zinc nanoaquacitrate on the immuno-biological reactivity of the organism of rabbit dams during the period of lactation.

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Section: Introductionmentioning

confidence: 99%

Influence of zinc nanoaquacitrate on the immuno-physiological reactivity and productivity of the organism of rabbits

Бойко¹,

Honchar²,

Lesyk³

et al. 2020

Regul. Mech. Biosyst.

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“…Um dos mais precisos é o método do "slope ratio" (relação dos coeficientes de regressão) que consiste na oferta de teores crescentes da fonte padrão e da fonte teste aos animais e uma (ou mais) medição do índice de status nutricional (FERREIRA et al, 2002;ZANETTI e CUNHA, 1997). Deve-se traçar a curva de resposta e analisar a porção reta, sendo que a biodisponibilidade será calculada através da relação entre as retas (teste e padrão).…”

Section: Biodisponibilidade E Balanço Metabólicounclassified

Avaliação de fontes de cobre para ovinos com ensaio de biodisponibilidade

Yoshikawa¹

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The study was conducted to estimate the relative bioavailability of two sources of supplemental copper: organic (copper methionine) and inorganic (copper sulfate) in the diet of lambs, by analyzing the concentration of copper and enzymes in the liver and metabolic balance calculation, using 40 lambs breed Merino X Texel, which was fed three concentrations of copper (basal + two additions) in two sources, which were randomly allotted to five groups, and subjected to five treatments: treatment 0: control (diet without addition of Cu); treatment 1: (diet with 10 mg Cu/Kg DM of CuSO 4) ; Treatment 2: (diet with 30 g Cu/Kg DM of CuSO 4); Treatment 3: (diet with 10 mg Cu/kg DM of copper methionine; Treatment 4: (diet with 30 mg cu/kg DM of copper methionine). Liver biopsies were made on 0 d. Blood samples were taken via the jugular vein on 0, 28, 56 and 84 d to determine serum Cu and serum ceruloplasmin and liver transaminases (AST, ALT) concentrations. The animals were slaughtered and samples of liver, kidney and muscle were taken for the determination of the levels of Cu and superoxide dismutase activity. In the last ten days of the experiment a metabolic balance of copper was conducted. The bioavailability was calculated by the "slope ratio" technique, using the concentration of copper in the liver as parameter. There was no difference (P >0.05) on animal performance (live weight and weight gain) among treatments. The serum AST and ALT levels remained below poisoning in all treatments during the period. The ceruloplasmin activity did not differ between treatments (P>0.05). The copper content in biopsy, serum and muscle was not different (P>0.05) between treatments. However, the mineral concentration in the liver of animals fed (284.28 mg/kg) was higher (P <0.05) when compared to the control group (168.01 mg/kg) and 30 Cumet mg/kg (341.29 mg/kg) was higher (P <0.05) at 10mg/kg MS (263.02 mg/kg). The SOD activity in the supplemented animals (mmol/mg prot) was superior to the control group. Copper in Kidneys was higher in animals that received 30mg/kg MS meth-Cu (6.65mg/kg) compared those receiving 10 mg/kg DM from the same source (3.86 mg/kg). Apparent absorption and retention of copper were higher for inorganic source, compared with the organic. The bioavailability determined by the concentration of copper in the copper liver, using the technique of "slope ratio", considering CuSO4 as standard (100%) presented availability of 150.64 % for Cumet.

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Lisina digestível e zinco quelado para frangos de corte machos: desempenho e retenção de nitrogênio na fase pré-inicial

et al. 2008

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RESUMO -Em dois ensaios experimentais, avaliaram-se níveis de lisina digestível (0,90; 1,00; 1,10; 1,20 e 1,40%) combinados a zinco quelado (43 e 253 ppm) para frangos de corte machos. Os períodos considerados foram: 1 a 11 dias de idade (desempenho) e 1 a 7 dias de idade (balanço de nitrogênio). O delineamento experimental utilizado foi de blocos ao acaso, em esquema fatorial 5 × 2. No ensaio de desempenho, utilizaram-se 7 repetições e 15 aves por unidade experimental e, no ensaio de digestibilidade, 6 repetições e 6 aves por unidade experimental. As dietas continham 2.960 de EM/kg e 21% de proteína bruta. Na fase de 1 a 11 dias de idade, não houve efeito de interação lisina digestível × zinco quelado no desempenho, mas verificou-se efeito quadrático dos níveis de lisina digestível sobre o peso final, o ganho de peso e o ganho de peso relativo e efeito linear crescente no consumo de ração. A conversão alimentar não diferiu com as variações dos níveis de lisina digestível e zinco na dieta. Nas condições de avaliação do desempenho, o nível ótimo de lisina digestível para frangos de corte machos mantidos em piso de concreto é de 1,19%. Na fase de 1 a 7 dias de idade, não houve influência da relação entre níveis de lisina digestível e zinco quelado no balanço de nitrogênio. A retenção de nitrogênio aumentou de forma linear crescente com o aumento da concentração de lisina digestível na dieta, o que está de acordo com o aumento linear do ganho de peso e da eficiência alimentar. A exigência de lisina digestível para frangos de corte machos de 1 a 7 dias de idade é igual ou superior a 1,40%.Palavras-chave: aminoácidos, deposição de nutrientes, micronutrientes, nutrição Digestible lysine and zinc chelate to male broiler: Performance in the preinitial phase and nitrogen retention ABSTRACT -Two experiments were carried out to evaluate different levels of digestible lysine (0.90; 1.00; 1.10; 1.20; e 1.40%) combined with zinc chelate (43 and 253 ppm) to male broiler. The considered periods were: initial phase -performance(1 to 11 days old) and nitrogen retention (1 to 7 days old). A randomized block experimental design in a 5 × 2 factorial arrangement was used. In performance assay, 7 replications and 15 birds per experimental unit was used. In the digestibility essay, 6 replications 6 birds for experimental unit were used. The diets contained 2.960 kcal/kg ME and 21.0% crude protein.In the initial phase, there was no digestible lysine × zinc chelate interaction on performance study, however a quadratic effect of digestible lysine on final weight, weight gain, relative weight gain and crescent linear effect in feed intake was observed.In feed: gain ratio did not differ with digestible lysine level and zinc chelate in the diet. In the performance, the better digestible lysine level for broiler raised in concrete floor is 1.19%. From 1 at 7 days old, there was no influence of the combinations of digestible lysine and zinc chelate on nitrogen balance. The nitrogen retention linearly increased as digestible lysine increased in...

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Biodisponibilidade de diferentes fontes de zinco para coelhos

Cited by 5 publications

References 0 publications

Influence of zinc nanoaquacitrate on the immuno-physiological reactivity and productivity of the organism of rabbits

Influence of zinc nanoaquacitrate on the immuno-physiological reactivity and productivity of the organism of rabbits

Avaliação de fontes de cobre para ovinos com ensaio de biodisponibilidade

Lisina digestível e zinco quelado para frangos de corte machos: desempenho e retenção de nitrogênio na fase pré-inicial

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