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Three phytase preparations were added to broiler rations with considerably reduced levels of phosphorus. Birds were allocated to a positive control group (I), a negative control group (II) and three phytase-supplemented groups (III – Aspergillus niger phytase, IV – Penicillium canescens phytase, V – Pichia phytase). Major components of starter and grower diets were wheat, corn and soybean meals. Starter...
The aim of the present study was to assess the physiological response of growing turkeys’ duodenal surface to dietary replacement of a common dietary component – soybean meal (SBM) with a soy protein isolate (SPI), as this treatment was associated with almost complete removal of α-galactosides from the diet (from 2.44 to 0.15%). Additionally, the utilization of selected dietary ingredients upon dietary...
A feeding trial with brown laying hens was carried out in order to examine the effects of chemical and hydrothermal treatment of rapeseeds on the performance and thyroid parameters of birds during a long-term experiment. Untreated and treated rapeseeds were included in layer diets at a level of 7.5, 15.0, 22.5 and 30.0%, and the results obtained were compared with a control group fed a diet containing...
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