Eric van Heugten 博士猪用替代性可回收矿物质补充剂研究的新进展.pdf

1、New Developments in the Search for Alternative,Recycled Mineral Supplements for SwineEric van HeugtenDepartment of Animal ScienceNorth Carolina State UniversitySwine Lagoon Sludge as a Potential Phosphorus SourceHoward,2022Composition of Swine Lagoon Sludge(as is)ParameterMeannStDevRangeTotal solids

2、(%)9.021646.841.9-15.2Total N(g/l)3.941643.651.2-6.3NH3N(g/l)0.861500.870.5-1.5Ca(g/l)4.491585.121.2-7.5P(g/l)3.831724.580.6-7.3Mg(g/l)1.221721.460.2-2.8K(g/l)0.621720.320.4-1.1Na(g/l)0.2780.02NDCl(g/l)0.5680.32NDFe(g/l)1.0680.42NDZn(g/l)0.61220.400.2-1.4Cu(g/l)0.25220.140.04-0.46Mn(g/l)0.0880.03ND

3、Variation in composition Collection method Sow vs.Nursery vs.Finisher Phytase impact?Owusu-Twum and Sharara,2020Dried Swine Lagoon SludgeGreenhouse sludge dryingDried,ground sludgeMineralConcentrationCalcium5.81Phosphorus4.31Sodium0.12Copper2,000Zinc4,000Peak Bone Breaking ForceTreatment0+0.075%+0.1

4、50%P-ValueMSP65.5372.0084.10P=0.01SLS65.5377.1871.49P=0.08Estimated Bioavailability of P in dried SLSBioavailability(%)SLSADG,kg/d65Serum P,mg/dL54Peak Bone Breaking Force67Ashed Swine Lagoon SludgeAshing dried sludgeAshed sludgeAshed,ground sludgeAshed Swine Lagoon Sludge Removal of organic matter(

5、C and N)Higher concentrations of minerals Elimination of potential pathogens Lower dietary inclusion rate to meet P needs Reduced transportation costs;high processing cost Impact of ashing on nutrient availability?Evaluation of Ashed Swine Lagoon SludgeMineralConcentration in ASLSDiet contribution a

6、t 1.65%ASLSPhosphorus,%9.20.15Calcium,%8.30.14Magnesium,%4.30.07Iron,ppm14833245Manganese,ppm142724Copper,ppm271745Zinc,ppm552391Serum PhosphorusLinear,P=0.02Linear,P=0.10Peak Bone Breaking ForceBone Ash ConcentrationLinear,P 0.001No effectLinear,P=0.13Linear,P=0.01Estimated Bioa