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Previous issue date: 2008-02-14 === Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior === This work aimed to evaluate intake in athletic horses fed diets with soybean oil inclusion and
the effects of apparent digestibility of nutrients, digestive kinetics, faeces characters and
physiologic, hematological and biochemical parameters and. In first essay, fifteen horses were
used in a completely randomized design with three diets and five repetitions. Diets used were:
diet without soybean oil inclusion (control); diet with inclusion of 8.5% soybean oil; diet with
inclusion of 19.5% soybean oil. Trial had 34 days of duration, 30 days to adaptation of diets
and four days to samples collection. Kinetics of liquid phase of digesta was estimated by
LIPE? (Isolated Lignin Purified Enriched) in liquid form. The LIPE? was given only one time
by oral infusion in 30th day of essay and faeces samples were collected at 2, 4, 8, 12, 16, 20,
24, 30, 36, 42, 48, 54, 60, 66, 72 and 78 hours after. Faeces characteristics were evaluate on
33th and 34th day of essay. Blood samples were taken before and at 34th day. Data were
submitted to variance analysis and means compared by Student Newman-Keuls test, at 5% of
significance. In secund essay, twelve horses were used in a completely randomized design
with two diets and six repetitions. Diets used were: diet without soybean oil inclusion
(control); diet with inclusion of 10% soybean oil. The trial had 82 days of duration, with three
physical effort tests before, at 60th and at 82th day of trial. Heart frequency and body
temperature were evaluation and blood samples for analyze of hematological and biochemical
parameters were taken in five moments in function of physical effort tests. The first data
collection, before the test, with horses at rest, and immediately after the test, and 10, 20 and
120 minutes after the physical effort tests. Data were submitted to non parametric analysis, at
5% of significance. There was a significant reduction of dry matter intake in horses fed high
fat diet. Apparent digestibility of fat increased in high fat diets (P<0.05) and apparent
digestibility of cellulose decrease (P>0.05) in diet with 19.5% soybean oil inclusion. Apparent
digestibility of others nutrients, except crude protein, digestive kinetics and faeces
characteristics were not affecting (P>0.05) in horses fed diets with soybean oil inclusion.
Horses fed high fat diet increased (P<0.05) in blood level of erythrocytes, hemoglobin and
triglycerides and reduction of mean corpuscular volume. Soybean oil in diets did not affect
physiological, hematological and biochemical parameters along the time intake time and in
function physical effort tests. High fat diets were palatable and safety without any colic or
diarrheas cases. The soybean oil can used in diet for horses, reducing dry matter intake and
increasing energy density of diets that is interesting to athletic horses === Objetivou-se avaliar o consumo de dietas com diferentes n?veis de inclus?o de ?leo de soja
por eq?inos atletas e os efeitos na digestibilidade aparente dos nutrientes, cin?tica digestiva,
caracter?sticas fecais, nos par?metros fisiol?gicos, hematol?gicos e bioqu?micos. No primeiro
ensaio foram utilizados quinze eq?inos em delineamento experimental inteiramente
casualizado com tr?s dietas e cinco repeti??es. As dietas utilizadas foram: dieta sem inclus?o
de ?leo de soja (controle); dieta com inclus?o de 8,5% de ?leo de soja; dieta com inclus?o de
19,5% de ?leo de soja. O ensaio teve dura??o de 34 dias, sendo 30 dias de adapta??o dos
eq?inos ?s dietas e quatro dias de coleta de amostras. A cin?tica da fase l?quida da digesta foi
estimada pelo LIPE? (Lignina Isolada, Purificada e Enriquecida) na forma l?quida, fornecido
no 30? dia de ensaio, em dose ?nica, e as amostras fecais foram coletadas nos tempos 0, 2, 4,
8, 12, 16, 20, 24, 30, 36, 42, 48, 54, 60, 66, 72 e 78 horas ap?s o fornecimento. As
caracter?sticas fecais foram avaliadas no 33? e 34? dia e, as coletas das amostras sang??neas no
in?cio e 34? dia do ensaio. Os resultados foram submetidos ? an?lise de vari?ncia e as m?dias
comparadas pelo teste Student Newman-Keuls, com n?vel de signific?ncia de 5%. No segundo
ensaio foram utilizados doze eq?inos em delineamento experimental inteiramente casualizado
com duas dietas e seis repeti??es. As dietas utilizadas foram: dieta sem inclus?o de ?leo de
soja (controle); dieta com inclus?o de 10% de ?leo de soja. O ensaio teve a dura??o de 82
dias, com a realiza??o de tr?s testes de esfor?o f?sico ao in?cio, 60? e 82? dia. Nesses testes
foram avaliadas freq??ncia card?aca e temperatura corporal e coletadas amostras de sangue
para an?lises hematol?gicas e bioqu?micas. A primeira coleta de dados ocorreu antes do teste,
com os eq?inos em repouso e, imediatamente, 10, 20 e 120 minutos ap?s o t?rmino dos testes
de esfor?o f?sico. Os valores m?dios dos par?metros fisiol?gicos, hematol?gicos e
bioqu?micos foram submetidos ? an?lise n?o param?trica, a 5% de signific?ncia. Houve
redu??o significativa no consumo de mat?ria seca das dietas com a inclus?o de ?leo de soja. O
coeficiente de digestibilidade aparente do extrato et?reo aumentou (P<0,05) nas dietas
hiperlipid?micas e o coeficiente de digestibilidade da celulose reduziu com a inclus?o de
19,5% de ?leo de soja. A digestibilidade dos demais nutrientes, exceto da prote?na bruta, a
cin?tica da digesta no trato gastrointestinal e as caracter?sticas fecais n?o foram alteradas
(P>0,05) pela inclus?o de ?leo nas dietas. Os eq?inos consumindo as dietas hiperlipid?micas
apresentaram aumento (P<0,05) nos n?veis sang??neos de eritr?citos, hemoglobina e
triglicer?dios e redu??o no volume corpuscular m?dio. N?o houve altera??o nos par?metros
fisiol?gicos, hematol?gicos e bioqu?micos dos eq?inos alimentados com a dieta
hiperlipid?mica ao longo do tempo de consumo das dietas e em fun??o dos testes de esfor?o
f?sico. As dietas mostraram-se palat?veis e seguras, sem ocorr?ncia de casos de c?licas ou
diarr?ias. O ?leo de soja pode ser utilizado nas dietas de eq?inos atletas visando suprir a
demanda energ?tica e reduzir o consumo de mat?ria seca, desej?vel em eq?inos da
modalidade esportiva Concurso Completo de Equita??o.
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