Digestibilidade do cálcio de ingredientes para suínos, avaliada por meio de dois métodos

Abstract

 RESUMODeterminaram-se os coeficientes de digestibilidade aparente e verdadeira do cálcio (Ca) de ingredientes para suínos por meio de dois métodos. Foram utilizados 60 suínos machos castrados, alojados em gaiolas de metabolismo e distribuídos em delineamento experimental inteiramente ao acaso, em arranjo fatorial 2 x 10 (métodos x tratamentos) e seis repetições por tratamento. Os tratamentos consistiram em oito alimentos, uma ração basal (0,072% de Ca total) e uma ração com baixo teor de Ca (0,018%). Os coeficientes de digestibilidade aparente e verdadeira do Ca foram avaliados utilizando-se simultaneamente dois métodos: coleta total de fezes e coleta de fezes com indicador fecal (cinza ácida insolúvel  CAI). 84.80 and 87.33%; Limestone 2, 84.19% and 86.32; Dicalcium Phosphate, 79.36 and 84.55%; Monodicalcium Phosphate, 83.83 and 85.81%, Dolomitic Limestone, 87.39% and 85.65; Meat and Bone Meal (40% CP), 70.00 and 68,64%; Meat and Bone Meal (50% CP), 66.92% and 68.03; Poultry by Product Meal, 73.40 and 73.95%, Calcium Lactate, 95.10

Digestibility of calcium and digestible calcium from inorganic sources evaluated in swine by two methods

“…Salguero Cruz et al (2014), working with diets containing 0.37% of total calcium, found no difference between calcium sources nor interference of fecal collection methods in the calcium digestibility.…”

“…However, the content of AIA in grains is low and the amount supplied in the diets is not enough to act as an indicator. Thus, eventually, external sources of AIA (Celite ™, sand and silica) can be added to diets to improve the accuracy of estimates, being also considered as external indicator, as assessed by Salguero Cruz et al (2014), Rocha Junior et al (2015 and Santana et al (2017). Carvalho et al (2013) compared different methods of analysis of acidinsoluble ash with the total collection method to the determination of metabolizable energy of corn to birds.…”

“…The true digestible calcium values of the sources (Table 7) were calculated from the true digestibility coefficients estimated in this study for castrated pigs in the growth phase. Salguero Cruz et al (2014) calculated the values of digestible calcium for growing pigs and reported 31.58% for calcitic limestone. This value is a very similar data to that obtained in present study, which is 31.31%.…”