Effects of phytase on bioavailability of phosphorus in soybean meal-based diets for Japanese flounder Paralichthys olivaceus

Abstract

Two experiments were conducted with flounder to examine phytase pretreatment or dietary phytase supplement for improving phosphorus (P) utilization of soybean meal (SBM) or soy protein concentrate (SPC). In experiment I, three SBM based‐diets, SBM (basal), phytase‐supplemented SBM (supplement), and phytase‐pretreated SBM (pretreatment), were fed to flounder, and digestibilities of P, gross energy (GE) and crude protein (CP) were measured by an indirect method. In experiment II, three SPC based‐diets including P‐supplemented mineral mixture (control), P‐free mineral mixture (unsupplemented), or P‐free mineral mixture supplemented with phytase (supplement) were fed to flounder for 50 days, and growth, whole‐body P composition, and plasma mineral concentration were determined. In experiment I, a significantly higher absorption of P was found in fish fed the pretreatment or supplement diet compared to the fish fed the basal diet. In experiment II, the growth of fish fed the supplement diet was comparable to that of the control and better than that of fish fed the unsupplemented diet. Whole‐body P retention and plasma P concentrations of supplement‐fed fish were significantly higher than those of fish fed the unsupplemented diet. These results suggest that phytase supplementation to the SBM‐ or SPC‐based diets improves phytase‐bound P availability for Japanese flounder.

Growth Performance of Nile Tilapia (<i>Oreochromis niloticus</i>) Fed Processed Soybean Meal Based Diets Supplemented With Phytase

“…Vielma et al (2004), in rainbow trout and Debnath et The positive effect of phytase on the growth performance of the fingerlings in the present study is consistent with the results obtained by various authors (Forster et al, 1999, Cheng and Hardy, 2002, Zongjia et al, 2003. However, some authors (Vielma et al, 2000, Masumoto et al, 2001, Yan and Reigh 2002, Sajjadi and Carter 2004, Yoo et al, 2005 have reported no effect of dietary phytase on weight gain of various fish species fed plant-based diets. This discrepancy in their results may be associated with differences in their diet composition and also to different rearing conditions.…”

Effects of phytase pretreatment of soybean meal and phytase-sprayed in diets on growth, apparent digestibility coefficient and nutrient excretion of rainbow trout (Oncorhynchus mykiss Walbaum)

“…When ADC of P was increased, the ADC of Mg, Mn, Fe, Cu and Zn were also increased. The function of dietary phytase to release P and other minerals for rainbow trout and other fish has been reported by other studies (Cain and Garling 1995;Rodehutscord and Pfeffer 1995;Schaefer et al 1995;Jackson et al 1996;Lanari et al 1998;Oliva-Teles et al 1998;Powers Hughes and Soaves 1998;Storebakken et al 1998;Vielma et al 1998Vielma et al , 2000Forster et al 1999;Papatryphon et al 1999;Masumoto et al 2001;Papariyphon and Soaves 2001;Sugiura et al 2001).…”

Efeito da suplementação de fitase na alimentação de juvenis de tambaqui (Colossoma macropomum)

“…Segundo Denstadli et al (2007), a fitase aumenta a disponibilidade do fósforo na matéria prima utilizada para formulação de rações e conseqüentemente a digestibilidade da proteína. A fitase ainda aumenta a digestibilidade dos aminoácidos (Sugiura et al, 2001), e alguns minerais como zinco, magnésio, cobre e ferro (Masumoto et al, 2001). Observa-se valores próximos entre a resposta da TEP para o tratamento sem suplementação e os tratamentos acima de 1400 UFA/kg de ração.…”