z-logo
Premium
Phosphorus Fractions in Manure from Growing Pigs Receiving Diets Containing Micronized Peas and Supplemental Enzymes
Author(s) -
Ige D. V.,
Akinremi O. O.,
Nyachoti C. M.,
Guenter W.
Publication year - 2006
Publication title -
journal of environmental quality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.888
H-Index - 171
eISSN - 1537-2537
pISSN - 0047-2425
DOI - 10.2134/jeq2005.0036
Subject(s) - latin square , manure , micronization , chemistry , zoology , feces , phosphorus , food science , agronomy , biology , particle size , fermentation , rumen , paleontology , organic chemistry
Different livestock feeds manipulations have been reported to reduce the total P concentration in manure. Information on the influence of these dietary manipulation strategies on the forms of P in manure is, however, limited. This study was, therefore, conducted to investigate the effect of diet manipulation through feed micronization and enzyme supplementation on the forms of P in swine manure. Eight growing pigs were fed four diets: barley–raw pea (BRP), barley–micronized pea (BMP), barley–raw pea with enzyme (BRPE), and barley–micronized pea with enzyme (BMPE) in a 4 × 4 Latin square design. Because we are interested in the effect of enzyme cocktail and pea micronization on manure P, we did not reduce the non‐phytate P with enzyme addition in this study. The fecal material and urine were collected and analyzed for total P. Fecal material was fractionated to determine the total P in H 2 O‐, NaHCO 3 –, NaOH‐, and HCl‐extractable fractions. The total P in the residual fractions was also determined. About 98% of the total P excreted by the pigs was found in the fecal material. Inclusion of micronized pea in pig diet did not have any significant effect ( p > 0.1) on either the total P or the different P fractions in the manure. The labile P (the sum of H 2 O‐P and NaHCO 3 –P) was significantly reduced ( p < 0.05) by the addition of enzyme to swine diets. Pigs fed the BRPE and BMPE had 14 and 18% lower labile P, respectively, compared with pigs fed the BRP. Enzyme addition to pig diets reduced not only the total P in manure, but also the labile P fraction, which is of great environmental concern. Thus, the potential of P loss to runoff and the subsequent eutrophication can be reduced by enzyme addition to pig diets.

This content is not available in your region!

Continue researching here.

Having issues? You can contact us here