This study evaluated the effects of adding an acidifying agent based on phosphoric acid (A), a yeast extract from a specific strain (Saccharomyces cerevisiae) (Y) and the combination of these two additives in food for adult cats. A test was conducted with 24 animals (mean 3.5 years old), mixed breed, weighing 3.72 ± 0.74 kg, kept in individual metabolic cages and distributed in a completely randomized design with a 2 × 2 factorial design (with or without A 0.6% of dry matter, with or without Y 1.5% of dry matter) totalling four treatments and six replicates of each condition. The experimental period was 15 days. The A or the Y reduced (P< 0.01) the dry matter intake, but the effect was not observed when they were associated. The association improved (P<0.05) the digestibility of dry matter and ashes. The A reduced urine pH (P=0.05) regardless of the presence of the Y. There was no effect (P>0.09) on other parameters evaluated. Results of this study show that the isolated use of 0.6% A or 1.5% Y in diets for cats is not recommended. However, the association of these two additives was beneficial in increasing nutrient digestibility.
RESUMOAvaliou-se efeito da inclusão de Yucca schidigera e zeólita (Clinoptilolita) em alimento comercial úmido para gatos sobre a aceitabilidade da dieta, produção fecal diária e porcentagem de águas nas fezes, e sobre o coeficiente de indigestibilidade aparente de cálcio, fósforo, magnésio, sódio, potásso, ferro e manganês. Foram utilizados 21 gatos adultos, sem raça definida, com quatro anos e meio de idade e peso médio de 3,56kg, distribuídos em sete tratamentos − dieta úmida denominada controle, e dietas controle com adição de 125, 250 e 375ppm de Yucca schidigera e 0,5%, 0,75% e 1,0% de zeólita − em delineamento inteiramente ao acaso. Não foram observadas diferenças significativas na aceitabilidade das dietas, na produção fecal diária, na porcentagem de água nas fezes e no coeficiente de indigestibilidade aparente nos minerais avaliados (P>0,05). A inclusão dos aditivos que apresentam como função principal a redução de odor fecal pode ser realizada sem interferências sobre a saúde dos animais, do ponto de vista da nutrição mineral.Palavras-chave: gato, aditivos, adsorção, odor fecal inclusão dos mais diversos aditivos, dentre eles a Yucca schidigera e a zeólita, cuja principal função é a redução do odor fecal (Lowe e Kershaw, 1997;Maia, 2008), de grande valia pela relação cada vez mais próxima entre os animais de companhia e os proprietários. ABSTRACT
This study aimed to evaluate the effects of adding Yucca schidigera and zeolite (Clinoptilolite) to feed (super premium and standard) for adult dogs on the apparent indigestibility coefficient of minerals. In the first assessment, 21 dogs were used, with average weight of 12.5kg±1.46 in seven treatments in two periods (super premium diet referred to as control and control with the addition of 125, 250, 375ppm Yucca schidigera and 0.5%, 0.75% and 1.0% zeolite). The second assessment was conducted with standard feed, using 21 experimental plots distributed in three treatments (standard diet referred to as control and control with the addition of 375ppm of Yucca schidigera and 1.0% zeolite). The additives did not affect the acceptability of feed and fecal characteristics in both assessments (P>0.05). With the exception of calcium, no minerals were affected by the inclusion of additives (P>0.05) in the experiment with super premium feed. In the assessment with standard feed, calcium as phosphorus and magnesium presented decreased excretion (P<0.05) with the inclusion of additives. It is possible to conclude that the inclusion of additives in the tested concentrations may interfere with the excretion of some minerals in the diet.Keywords: adsorption, pets, clinoptilolite RESUMO Este trabalho teve como objetivo avaliar os efeitos da inclusão de
Maintaining the pH of urine in the ideal range (6.2 -6.4) is of great importance for health promotion in the lower urinary tract of cats. In the economic and standard feed sector this is a major concern, given that the animal urine tends to be alkaline after food consumption of those commercial segments, which predispose to the formation of struvite urolith. Therefore, this study aimed to study the effects of increasing levels of urinary acidifiers (0.0%, 0.3%, 0.6% and 0.9%, on a dry matter base) in feed with high excess base over the acid-basic balance in the organism, apparent digestibility coefficients of nutrients, urinary pH, hydro-electrolyte balance in cats, as well as the adequacy of equations proposed in the literature to estimate the urinary pH. Twenty-four adult cats, males and females were distributed in a completely randomized design, consisting of six animals per treatment. The dry matter content of urine presented a quadratic behavior (p<0,05; y = 9.5863 + 3.2299x + 0.7871x 2 R 2 = 99,91%), HCO 3 -, total CO 2 and excess blood base during the period in which the animals were fed were high when including 0.9% acidifier compared to 0.6% (p<0.05). In contrast, the use of the additive did not change the urinary pH, blood electrolyte concentration, nutrient digestibility, fecal score, food and water intake (p>0.05). The equations proposed in the literature, which use excess of base in feed to estimate urinary pH, overestimated the pH values found in this study. Index terms:Feline, blood gas, pH. RESUMOA manutenção do pH da urina na faixa ideal (6,2 -6,4) é de grande importância para a promoção da saúde do trato urinário inferior de felinos. Em alimentos do segmento econômico e standard essa é uma grande preocupação, já que a urina dos animais tende a ser alcalina, após o consumo de alimentos desses segmentos comerciais, predispondo à formação de urólito de estruvita. Nesse sentido, neste trabalho, objetivou-se estudar os efeitos de níveis crescentes de acidificante urinário (0,0%; 0,3%; 0,6%; e 0,9%, em base de matéria seca) em alimento com elevado excesso de bases sobre o balanço ácido-básico do organismo, coeficientes de digestibilidade aparente dos nutrientes, pH urinário, equilíbrio hidro-eletrolítico de gatos, bem como a adequação de equações propostas na literatura para estimar o pH urinário. Foram utilizados vinte e quatro gatos adultos, machos e fêmeas, distribuídos em delineamento inteiramente casualizado, constituído de seis animais por tratamento. A matéria seca da urina apresentou comportamento quadrático (p<0,05; y = 9.5863 + 3.2299x + 0.7871x 2 R 2 = 99,91%), o HCO 3 -, CO 2 total e excesso de bases sanguíneos, no período em que os animais estavam alimentados, apresentaram-se elevados, na inclusão de 0,9% de acidificante em comparação a 0,6% (p<0,05). Em contrapartida, a utilização do aditivo não alterou o pH urinário, a concentração de eletrólitos sanguíneos, digestibilidade dos nutrientes, escore fecal, consumo de alimento e de água (p>0,05). As equações propostas na literatura...
Inclusion of Yucca schidigera extract and zeolite in the diet and its relationship to the apparent digestibility of nutrients... Ciência Rural, v.46, n.8, ago, 2016.
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