Phytase and sodium diformate supplementation in a plantbased diet improves protein and mineral utilization in rainbow trout (Oncorhynchus mykiss)

A basal isonitrogenous and isoenergetic plant-based diet (Control) was supplemented with either 10 g kg ¹ sodium diformate (NaDF), 4000 FTU kg ¹ phytase (Phy) or a combination of both additives (NaDF + Phy). Three hundred juvenile rainbow trout with an average weight of 120 g were randomly distributed into 12 fibreglass tanks (300 L). After 65 days of trial, fish fed diets containing phytase, NaDF or the combination of both additives showed a higher growth rate (P minor to 0.05) compared to fish fed Control diet. NaDF increased feed intake (P = 0.032), while phytase inclusion resulted in a better feed conversion ratio (P minor to 0.0001) and a higher N retention efficiency (P = 0.02) compared with the Control. Apparent digestibility of P, Ca, Mg and Zn was improved by the use of phytase (P minor to 0.005) as well as P, Ca and Mg retention efficiency in fish (P minor to 0.0001). Using 4000 FTU kg ¹ phytase in plant-based diets resulted in a 13% and 50% reduction in N and P loadings, respectively. The use of NaDF in combination with phytase in a plant-based diet for rainbow trout resulted in a higher weight gain than that when NaDF was used alone.

Bibliographic Details

Main Authors:	Morales, Gabriel A., Denstadli, V., Collins, S. A., Mydland, L. T., Moyano, Francisco J., Øverland, M.
Format:	Texto biblioteca
Language:	eng
Subjects:	DIGESTIBILITY, NUTRIENT WASTE OUTPUT, ORGANIC ACID SALT, PHYTASE, PHYTATE, RAINBOW TROUT,
Online Access:	http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=47677 http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber= http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber= http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber= http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=
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