Effect of phytase supplement on the efficiency of diet in finishing pigs
1996
Mateescu, M. | Sarchizian, D. | Solcan, E. (S.C. ROMSUINTEST S.A., Peris (Romania))
The trial tested a solid preparation of phytase, obtained by I.C.A. Bucharest, by biosynthesis with Aspergillus ficuum. The preparation, with an enzymatic activity of 45.3 UF per g was added to the diet in a quantity of 700 UF per Kg mixed feed. The diet had as main components maize, barley, soybean and sunflower meals; it had a relative high content of phytate as phytic acid; a high percentage of Ca and P, a relative low intrinsic phytasic activity. Taking into consideration that the enzymatic preparation is characterised by two optimal levels of pH (2.5-3.5 and 4.5-6.0) the environmental conditions in the gastrointestinal tract are favourable to the action of this enzyme on the feed intake. The experiment was carried out on 12 groups of finishing pigs, fed ad. lib for 23 days. The goal of the experiment was to establish the effect of phytase supplement on the production performances: the rate growth was with 25 per cent higher and the conversion with 7.3 per cent better than control group. It was also studied the effect of phytase on digestive assimilation of Ca and P. A reduction of excreted quantities of Ca and P (38 per cent and respective 19 per cent) was found at experimental group compared to control group. The results allowed to conclude that the phytase had a positive effect on the digestive utilisation of some minerals (Ca, P) on production performances and on the reduction of environmental pollution by decreased quantity of P in pig slurry.
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