?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=https%3A%2F%2Forgprints.org%2Fid%2Feprint%2F3494%2F&rft.title=Long-term+stability+and+mineralisation+rate+of+compost+is+influenced+by+timing+of+nutrient+application+during+composting+of+plant+residues&rft.creator=Dresb%C3%B8ll%2C+Dorte+Bodin&rft.creator=Magid%2C+Jakob&rft.creator=Thorup-Kristensen%2C+Kristian&rft.subject=+Composting+and+manuring&rft.description=The+long-term+nitrogen+mineralization+and+stability+of+compost+based+on+easily+available+plant+residues+was+examined.+Four+different+composts+were+prepared+from+wheat+straw+and+clover-grass+hay%2C+one+treatment+receiving+all+material+initially+(100%2F0)%2C+two+treatments+where+addition+of+75%25+of+the+clover-grass+was+postponed+for+3+weeks+(75%2F25%2C3w)+respectively+8+weeks+(75%2F25%2C8w)+and+one+treatment+receiving+only+25%25+of+the+clover-grass+added+to+the+other+treatments+(25%2F0).+Mineralization+and+stability+of+the+compost+was+followed+for+24+weeks+in+leaching+tubes%2C+leached+regularly+by+0.01+M+CaCl2.+Postponing+the+addition+of+the+clover-grass+hay+for+3+weeks+(75%2F25%2C3w)+during+composting+had+a+significant+effect+on+the+N+mineralization+rate+leading+to+more+mineralised+N+during+the+leaching+period.+Postponing+the+addition+for+8+weeks+(75%2F25%2C8w)+did+not+affect+mineralization+pattern.+Most+of+the+decomposition+in+this+treatment+occurred+in+the+leaching+tubes+after+the+composting+step+and+no+temperature+increase+(thermophilic+phase)+was+observed+here.+Thus%2C+the+decomposition+was+seemingly+dominated+by+different+microorganisms+compared+to+the+thermophilic+phases+during+composting+observed+in+i.e.+75%2F25%2C3w+and+100%2F0.+When+only+25%25+of+the+clover-grass+hay+was+added+(25%2F0)+decomposition+was+so+N+limited+that+almost+no+net+mineralization+occurred.+%0D%0APostponing+the+addition+for+3+weeks+(75%2F25%2C3w)+increased+the+stability+of+the+compost+during+the+initial+14+weeks+of+incubation+probably+because+more+slowly+decomposable+compounds+were+degraded%3B+however%2C+after+24+weeks+of+incubation+losses+were+similar+to+losses+in+the+treatment+receiving+all+the+material+from+the+start.+Thus%2C+the+postponed+addition+was+shown+to+alter+the+mineralization+pattern+and+stability+of+the+compost+in+a+long-term+scale.+This+has+implications+for+production+of+growing+media%3A+A+disadvantage+of+the+postponed+addition+is+the+higher+mass+loss+during+composting.+However%2C+the+75%2F25%2C3w+treatment+with+the+supplementary+addition+postponed+for+3+weeks+remained+stable+for+a+longer+period+than+the+other+treatments+and+might+be+a+functional+improvement+as+growing+medium+for+plants+with+a+shorter+growth+period.+&rft.date=2006&rft.type=Journal+paper&rft.type=NonPeerReviewed&rft.format=application%2Fpdf&rft.language=en&rft.identifier=%2Fid%2Feprint%2F3494%2F1%2F3494.pdf&rft.identifier=+++Dresb%C3%B8ll%2C+Dorte+Bodin%3B+Magid%2C+Jakob+and+Thorup-Kristensen%2C+Kristian+++(2006)+Long-term+stability+and+mineralisation+rate+of+compost+is+influenced+by+timing+of+nutrient+application+during+composting+of+plant+residues.+++Compost+Science+%26+Utilization%2C+14+(3)%2C+pp.+215-221.++++++++