Dietary microbial phytase supplementation and the utilization of phosphorus, trace minerals and protein by rainbow trout [Oncorhynchus mykiss (Walbaum)] fed soybean meal‐based diets

By S. Sugiura, J. Gabaudan, F. Dong, R. Hardy. 2001

230 citations recorded by the source corpus.

Effects of thermal and enzymatic treatments of soybean meal on apparent absorption of total phosphorus, phytate phosphorus, nitrogen (protein), ash, calcium, magnesium, copper, iron, manganese, strontium and zinc were examined using rainbow trout, Oncorhynchus mykiss (Walbaum), as the test species. Absorption of the test nutrients was estimated using yttrium as an inert non-absorbable indicator. Thermal treatments (microwaving, dry roasting, steam heating, cooking) had no measurable effect on the apparent absorption of phosphorus and other minerals. Phytase supplementation increased the apparent absorption of phosphorus, nitrogen (protein), ash, calcium, magnesium, copper, iron, strontium and zinc in low-ash diets containing soybean meal, but had little effect in high-ash diets containing both soybean and fish meal. In low-ash diets, the apparent absorption of phosphorus increased in accord with the level of phytase added to the diet, from 27% (no phytase added) up to 90% (phytase added, 4000 units kg−1 diet) or 93% (predigested with phytase, 200 units kg−1 soybean meal). In high-ash diets, dietary acidification with citric acid decreased the effect of phytase, whereas in low-ash diets, acidification markedly increased the effect of the enzyme. Excretion of phosphorus in the faeces of fish fed a low-ash diet containing phytase-treated soybean meal was 0.32 g per kg diet consumed, a 95%−98% reduction compared with phosphorus excretion by fish consuming commercial trout feeds.

Subfields: Animal Science and Zoology, Aquatic Science, Physiology

View Paper: https://www.semanticscholar.org/paper/527c49472b979868a5b7964e0f857fa7e7ca9f4b

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Animal Science and Zoology

1. Z. Cheng
2. R. Hardy
3. C. C. Kohler
4. M. Drew
5. C. Carter

In Aquatic Science

1. J. Trushenski
2. R. Hardy
3. Z. Cheng
4. J. Diana
5. M. Drew
6. C. C. Kohler
7. C. Kasper
8. M. Sajjadi

In Physiology

1. J. Trushenski
2. Z. Cheng
3. R. Hardy
4. C. C. Kohler
5. M. Drew
6. Rosamond L. Naylor
7. Dane H. Klinger

Citations in the corpus

• The use of acidifiers in fish nutrition. (2008, background): “[32] found that in high-ash diets for rainbow trout, feed acidification with citric acid decreased the effect of supplemental phytase, whereas in low-ash diets, it markedly increased the effect of the enzyme.”
• Effect of phytic acid and phytase on feed intake, growth, digestibility and trypsin activity in Atlantic salmon (Salmo salar, L.) (2004, background): “based diet was observed (Sugiura et al. 2001).”
• Nutritional Value of Diets Containing Distiller's Dried Grain with Solubles for Rainbow Trout, Oncorhynchus mykiss (2004, background): “One way of reducing phosphorus excretion is to supplement commercial phytase in plant protein-based fish diets (Cain and Garling 1995; Rodehutscord and Pfeffer 1995; Storebakken et al. 1998; Vielma et al. 1998, 2000; Papatryphon et al. 1999; Sugiura et al. 2001; Cheng and Hardy In press).”
• 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) (2009, background): “Phytase supplementation in diet increased P digestibility by rainbow trout, similar to other studies with Atlantic salmon (Storebakken et al. 1998) and other salmon (Brown 1993; Cain and Garling 1995; Rodehutscord and Pfeffer 1995; Teskeredzic et al. 1995; Riche and Brown 1996; Lanari et al. 1998; V”
• Challenges and Opportunities in Finfish Nutrition (2006, background): “Use of phytase supplements in fish feeds has significantly improved phosphorus availability and retention (Papatryphon et al. 1999; Vielma et al. 2000; Sugiura et al. 2001), as well as weight gain, growth rate, and nutrient digestibility (Debnath et al. 2005).”
• Effects of pretreatment with microbial phytase on phosphorous utilization and growth performance of Nile tilapia (Oreochromis niloticus) (2008, background): “Sugiura et al. (2001) also observed that the ADCp reached 93% in rainbow trout fed with a phytase pretreated diet containing 4.21 g kg)1 of total P.”
• A review of processing of feed ingredients to enhance diet digestibility in finfish (2007, background): “A number of studies have shown that supplementation of SBM containing diets with phytase increases digestibility of P, minerals and CP (Ramseyer et al., 1999; Vielma et al., 2000; Sugiura et al., 2001; Cheng et al., 2004; Riche and Garling, 2004).”