Técnicas de avaliação dos valores energéticos e dos coeficientes de digestibilidade de alguns alimentos para emas (Rhea americana) em crescimento

Abstract

RESUMO -Avaliaram-se os valores de energia metabolizável aparente e aparente corrigida (EMA e EMAn, respectivamente), os coeficientes de metabolização da energia bruta (CMEB e CMEBn) e da digestibilidade da MS e MO (CDAMS e CDAMO) de alguns alimentos para emas (Rhea americana) de sete meses de idade, utilizando-se as técnicas de coleta total de excretas e do óxido de cromo como indicador. Utilizou-se o delineamento experimental inteiramente ao acaso, em esquema de parcelas subdivididas, com seis tratamentos, cada um com três repetições. O experimento foi realizado três vezes, seqüencialmente.Os valores dos CDAMS, CDAMO, EMA, EMAn, CMEB e CMEBn dos alimentos, determinados por meio da técnica de coleta total de excretas, foram, de modo geral, superiores aos determinados pela técnica do óxido de cromo. A técnica do óxido de cromo mostrou-se inadequada para determinar os CDAMS, CDAMO, EMA, EMAn, CMEB e CMEBn dos alimentos para emas em comparação à técnica de coleta total de excretas. Recomenda-se a realização de ensaios similares envolvendo outras técnicas indiretas para estimar parâmetros de digestibilidade nesta espécie.Palavras-chave: animais silvestres, coleta total, energia metabolizável, nutrição, óxido de cromo, Rhea americana Techniques of evaluation of the energy values and the coefficients of digestibility of some feedstuffs for growing greater rhea (Rhea Americana)ABSTRACT -It was evaluated the values of apparent metabolizable and apparent corrected energy (AME and AMEn, respectively), the coefficients of metabolization of gross energy (MCEC and MCECn) and the digestibility of DM and OM (ADDMC and ADOMC) of some feedstuffs for greater rhea averaging seven months old, by the techniques of total feces collection and chromium oxide as external marker. The experiment was analyzed as a complete randomized design with six treatments and three replications per experiment. The experiment was carried out three times senquentially. The values of ADDMC, ADOMC, AME, AMEn, MCEC and MCECn of feedstuffs determined by total feces collection were greater than those determined with chromium oxide. The use of marker was not efficient to determine ADDMC, ADOMC, AME, AMEn, MCEC and MCECn of the feedstuffs for greater rhea when compared to total feces collection method. It is recommended more studies of indirect techniques to estimate the digestibility parameters in similar assays.Key Words: chromium oxide, metabolizable energy, nutrition, Rhea Americana, total collection, wild animal IntroduçãoApesar da riqueza de espécies da fauna silvestre nativa, o Brasil sempre subutilizou sua diversidade bioló-gica, embora tenha se destacado nas últimas décadas como um dos principais exportadores de alimentos. A maior parte dos sistemas produtivos do agronegócio do país baseia-se em espécies exóticas.Face às políticas e aos instrumentos governamentais de conservação da biodiversidade, surgiu a exploração racional e sustentável de espécies de animais silvestres com potencial zootécnico, entre as quais se destacam as

Effect of glycerin on digestibility of diets for pigs determined with different methodologies

“…Morata et al (2006), however, observed that the digestibility coefficients and metabolizable energy of the feed as determined by the total collection technique were frequently higher than that that determined by the chromic oxide procedure. Sakomura and Rostagno (2007) stated that the main limitation of the total collection method is the control upon the collection of feces and urine samples to collect them without contaminations like skin flakes, hair and feed, which may interfere with the determination of the feed energy.…”

Effect of glycerin on digestibility of diets for pigs determined with different methodologies

“…Morata et al (2006), however, observed that the digestibility coefficients and metabolizable energy of the feed as determined by the total collection technique were frequently higher than that that determined by the chromic oxide procedure. Sakomura and Rostagno (2007) stated that the main limitation of the total collection method is the control upon the collection of feces and urine samples to collect them without contaminations like skin flakes, hair and feed, which may interfere with the determination of the feed energy.…”

Apparent metabolizable energy concentration and ileal amino acid digestibility in cereal grains fed to broiler chickens

“…The reduced recovery rate of the index can lead to an increase in the indigestibility factor (ratio of chromium concentrations in the diet to chromium concentrations in excreta). The recovery rates of chromium were reported to be 78.9% and 70.5% in growing pigs and Greater rheas [ 31 , 32 ]. In the present study, the recovery of chromium was 69.9%, and this low chromium recovery might primarily stem from issues associated with the index compound.…”

Comparative Study of Foreign and Domestic Feeds and Their Effects on Eggs Production in Golden Breed in Baghlan Province of Afghanistan

“…In the background, the poultry industry is growing over the past few years and we can see all these developments recently. Feed companies continuously working in this area are trying to use formulas that increase egg and meat production and market themselves accordingly [3]. On the other hand, to be able to compete with its competitors, which is a positive competition, means that the companies do not compete with each other unless to improve the quality and quantity of feed.…”

“…On the other hand, to be able to compete with its competitors, which is a positive competition, means that the companies do not compete with each other unless to improve the quality and quantity of feed. Animals have different needs, they must be present in the feed, whether it is chemical or nutritional, to provide a high quality product to the community [3,4]. Therefore, it is necessary to know the necessary knowledge about the composition of feed, the sources of feed and the preparation of chicken feed.…”

Effect of glycerin on digestibility of diets for pigs determined with different methodologies

“…Morata et al (2006), however, observed that the digestibility coefficients and metabolizable energy of the feed as determined by the total collection technique were frequently higher than that that determined by the chromic oxide procedure. Sakomura and Rostagno (2007) stated that the main limitation of the total collection method is the control upon the collection of feces and urine samples to collect them without contaminations like skin flakes, hair and feed, which may interfere with the determination of the feed energy.…”

Apparent metabolizable energy concentration and ileal amino acid digestibility in cereal grains fed to broiler chickens

“…The reduced recovery rate of the index can lead to an increase in the indigestibility factor (ratio of chromium concentrations in the diet to chromium concentrations in excreta). The recovery rates of chromium were reported to be 78.9% and 70.5% in growing pigs and Greater rheas [ 31 , 32 ]. In the present study, the recovery of chromium was 69.9%, and this low chromium recovery might primarily stem from issues associated with the index compound.…”

Comparative Study of Foreign and Domestic Feeds and Their Effects on Eggs Production in Golden Breed in Baghlan Province of Afghanistan

“…In the background, the poultry industry is growing over the past few years and we can see all these developments recently. Feed companies continuously working in this area are trying to use formulas that increase egg and meat production and market themselves accordingly [3]. On the other hand, to be able to compete with its competitors, which is a positive competition, means that the companies do not compete with each other unless to improve the quality and quantity of feed.…”

“…On the other hand, to be able to compete with its competitors, which is a positive competition, means that the companies do not compete with each other unless to improve the quality and quantity of feed. Animals have different needs, they must be present in the feed, whether it is chemical or nutritional, to provide a high quality product to the community [3,4]. Therefore, it is necessary to know the necessary knowledge about the composition of feed, the sources of feed and the preparation of chicken feed.…”

Effect of glycerin on digestibility of diets for pigs determined with different methodologies

“…Morata et al (2006), however, observed that the digestibility coefficients and metabolizable energy of the feed as determined by the total collection technique were frequently higher than that that determined by the chromic oxide procedure. Sakomura and Rostagno (2007) stated that the main limitation of the total collection method is the control upon the collection of feces and urine samples to collect them without contaminations like skin flakes, hair and feed, which may interfere with the determination of the feed energy.…”

Apparent metabolizable energy concentration and ileal amino acid digestibility in cereal grains fed to broiler chickens

“…The reduced recovery rate of the index can lead to an increase in the indigestibility factor (ratio of chromium concentrations in the diet to chromium concentrations in excreta). The recovery rates of chromium were reported to be 78.9% and 70.5% in growing pigs and Greater rheas [ 31 , 32 ]. In the present study, the recovery of chromium was 69.9%, and this low chromium recovery might primarily stem from issues associated with the index compound.…”

Comparative Study of Foreign and Domestic Feeds and Their Effects on Eggs Production in Golden Breed in Baghlan Province of Afghanistan

“…In the background, the poultry industry is growing over the past few years and we can see all these developments recently. Feed companies continuously working in this area are trying to use formulas that increase egg and meat production and market themselves accordingly [3]. On the other hand, to be able to compete with its competitors, which is a positive competition, means that the companies do not compete with each other unless to improve the quality and quantity of feed.…”

“…On the other hand, to be able to compete with its competitors, which is a positive competition, means that the companies do not compete with each other unless to improve the quality and quantity of feed. Animals have different needs, they must be present in the feed, whether it is chemical or nutritional, to provide a high quality product to the community [3,4]. Therefore, it is necessary to know the necessary knowledge about the composition of feed, the sources of feed and the preparation of chicken feed.…”