Effect of phytase supplementation on growing pigs performance
2012
Dietary concentrations of phytate are crucial for its anti-nutritive
properties and its negative impact on P availability. The increase of dietary
phytate level is shown to increase endogenous losses of amino acids and
minerals in pigs. The partial availability of the P component of phytate to
simple-stomached species attains importance as the world's rock phosphate
reserves are not renewable, which could lead to a P supply crisis in the
future. Supplementing phytase is becoming increasingly common as a method to
improve the availability of P in plant ingredients containing high levels of
phytate P. Fourty-eight pigs (Swedish Landrace boars × Dutch landrace sows)
weaned at day 35 with an initial BW of 8.72±0.28 kg were used for a 40-day
weaner performance study. The study was structured as a complete randomized
design to evaluate the response of weaner pigs to four concentrations of
microbial phytase produced by Aspergillus niger: (T1) basal diet; (T2) basal
diet + 1000 FTU/kg; (T3) diet with decreased dicalcium phosphate + 1000
FTU/kg; and (T4) diet with no dicalcium phosphate + 1000 FTU/kg. Control
group of piglets (T1) has achieved standard body mass while addition of
phytase in meal increased body mass by 6.59% in T2 and 7.52% in T3. Phytase
supplementation prevented decreased body weight gain diets where available
phosphorous level was reduced by 50. The amount of consumed feed per day was
not significantly different. Feed efficiency of T2 and T3 groups was by 3.23%
better and of T4 for 11.29% lower compared to the control group of piglets
(T1). Lower production results achieved by the use of low phosphorous diets
can be avoided to a certain level by the use of microbial phytase. The use of
phytase in pig diet significantly improved phosphorous availability, as well
as of other mineral substances from the phytate complex. [Projekat
Ministarstva nauke Republike Srbije, br. III46002]
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