Phytate hydrolysis in pigs fed a barley-rapeseed meal diet treated with Aspergillus niger phytase or steeped with whey.

  title={Phytate hydrolysis in pigs fed a barley-rapeseed meal diet treated with Aspergillus niger phytase or steeped with whey.},
  author={Erika Skoglund and Matti N{\"a}si and Ann-Sofie Sandberg},
  journal={Canadian Journal of Animal Science},
The degradation of phytate (myo-inositol hexaphosphate) in a barley-rapeseed meal (80:20) diet due to supplemented Aspergillus niger phytase and steeping (soaking at 40 °C for 3 h with feed to water ratio 1 kg:1 L) with whey was studied in eight growing pigs (initial weight 27.8 kg). Phytate and its hydrolysis products (inositol penta-, tetra- and triphosphates, abbreviated IP5, IP4 and IP3) in diets and feces were determined using ion-pair high-performance liquid chromatography (HPLC… 
Hydrolysis of phytate and formation of inositol phosphate isomers without or with supplemented phytases in different segments of the digestive tract of broilers
The hydrolytic cleavage of the first phosphate group is not the only limiting step in phytate degradation in broilers and their gut microbiota to hydrolyse InsP6 in low-P diets.
The objective was to characterise degradation of myo-inositol 1,2,3,4,5,6-hexakis (dihydrogen phosphate) (InsP6) and formation of inositol phosphate (InsP) isomers in different segments of the
Phytase studies in pigs and poultry: effect on protein digestion and energy utilization
Dietary phytase improved digestibility of amino acids, both in poultry and pigs, and it also improved energy metabolizability in poultry.
Different sensitivity of recombinant Aspergillus niger phytase (r-PhyA) and Escherichia coli pH 2.5 acid phosphatase (r-AppA) to trypsin and pepsin in vitro.
Different sensitivities of r-AppA and r-PhyA to trypsin and pepsin are demonstrated, suggesting active trypsIn resistant r- PhyA and pepin resistant r -AppA polypeptides.
Distribution of inositol phosphates in animal feed grains and excreta: distinctions among isomers and phosphate oxygen isotope compositions
Background and AimsPhytate (myo-IP6) is a common form of organic phosphorus in the environment. Little information is available, however, about the distribution of phytate and its degradation
Reevaluation of Phytase Action Mechanism in Animal Nutrition
Analysis of the transformations in the inositol hexakisphosphate (IP 6 )→inositol (I) reaction chain shows that IP 6 dephosphorylation as a whole limits the phosphate group removal from I(1,2,5,6)P 4 (third reaction from the beginning of hydrolysis of phosphate bonds in PA).
Inositol phosphates in the environment.
Recent advances in technology, such as the development of suitable chromatographic and capillary electrophoresis separation techniques, should help to elucidate some of the more pertinent questions regarding inositol phosphates in the natural environment.
Phytases for Feed Applications


The effect of supplementary Aspergillus niger phytase in diets for pigs on concentration and apparent digestibility of dry matter, total phosphorus, and phytic acid in different sections of the alimentary tract.
The apparent duodenal, ileal, and total tract (overall) digestibilities of DM, total P, and phytate P were calculated using both Cr-NDR (neutral detergent residue mordanted with Cr) and Co-EDTA as dual-phase markers.
Importance of cereal phytase activity for phytate phosphorus utilization by growing pigs fed diets containing triticale or corn.
The higher the phytase activity of the diet, the greater the phytic phosphorus availability and the lower the bone-mineral disorders.
Effects of Microbial Phytase Supplementation and Soaking of Barley-Soybean Meal on Availability of Plant Phosphorus for Growing Pigs
Abstract The efficacy of phytase supplement, 1200 U/kg, produced by Aspergillus niger on phytin phosphorus (P) availability was assayed in a 6 × 6 Latin square designed digestibility and balance
Improvement of phosphorus availability by microbial phytase in broilers and pigs
When microbial phytase was added to low-P diets for broilers the availability of P increased to over 60% and the amount of P in the droppings decreased by 50%, and the growth rate and feed conversion ratio were comparable to or even better than those obtained on control diets.
Addition of microbial phytase to diets of young pigs.
The addition of the microbial enzyme resulted in increased rate and efficiency of gain, increased digestibility of dietary phosphorus, increased serum phosphorus, decreased serum alkaline phosphatase, and increased meetatarsal ash and weight of metatarsal phosphorus.
Effect of supplementary Aspergillus niger phytase in diets for piglets on their performance and apparent digestibility of phosphorus
A total of 384 piglets from a three-way cross Yorkshire ♂ × (Finnish Landrace ♂ × Dutch Landrace♀) ♀ in the live-weight range of 11 to 25 kg were used in a feeding trial. The effect of supplementary
Supplemental microbial phytase improves bioavailability of dietary zinc to weanling pigs.
Two experiments were conducted to determine the effects of supplemental microbial phytase on utilization of dietary zinc by weanling pigs. Experiment 1 was a 2 x 3 factorial arrangement of treatments