Turnover of manure 15N-labelled ammonium during composting and soil application as affected by lime and superphosphate addition
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Turnover of manure 15N-labelled ammonium during composting and soil application as affected by lime and superphosphate addition. / Tran, Tien Minh; Luxhøi, Jesper; Jensen, Lars Stoumann.
I: Soil Science Society of America Journal, Bind 77, Nr. 1, 2012, s. 190-201.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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T1 - Turnover of manure 15N-labelled ammonium during composting and soil application as affected by lime and superphosphate addition
AU - Tran, Tien Minh
AU - Luxhøi, Jesper
AU - Jensen, Lars Stoumann
PY - 2012
Y1 - 2012
N2 - To determine N turnover and losses during aerobic composting of animal manure, a 41-d laboratory study was performed on pig manure composting with three additive treatments (Straw: pig manure + straw only; Lime: pig manure + straw + quick lime; and SSP: pig manure + straw + single superphosphate). The NH4-N pool in the pig manure was initially labeled with 15N to determine the fate of manure NH4-N during composting. The composts were subsequently applied to soil to investigate the effects on soil mineral N and to trace the 15N during 60 d of incubation at 25°C. Of the initial manure 15NH4-N, approximately 30, 90, and 20% was lost by NH3 volatilization during composting in the Straw, Lime, and SSP treatments, respectively. Concurrently, 62, 16, and 41% of initial 15NH4-N was immobilized in the respective treatments. When the composts were applied to soil, the mineral N in soil with SSP compost was higher throughout the incubation than in soil with Straw and Lime composts. This was because of higher mineral N content in the SSP compost on application and higher net N mineralization from that compost in the soil. In soil with Straw compost, N mineralization and immobilization were slow or effectively in balance. In soil with Lime compost, net N immobilization was strong in the fi rst 10 d, but then net N mineralization dominated the remaining period of soil incubation. Overall, adding lime before composting reduced the NH4-N content in the compost and the amount available in soil, while adding superphosphate increased the NH4-N content in both. Therefore, superphosphate addition increased the potential fertilizer value of composted pig manure.
AB - To determine N turnover and losses during aerobic composting of animal manure, a 41-d laboratory study was performed on pig manure composting with three additive treatments (Straw: pig manure + straw only; Lime: pig manure + straw + quick lime; and SSP: pig manure + straw + single superphosphate). The NH4-N pool in the pig manure was initially labeled with 15N to determine the fate of manure NH4-N during composting. The composts were subsequently applied to soil to investigate the effects on soil mineral N and to trace the 15N during 60 d of incubation at 25°C. Of the initial manure 15NH4-N, approximately 30, 90, and 20% was lost by NH3 volatilization during composting in the Straw, Lime, and SSP treatments, respectively. Concurrently, 62, 16, and 41% of initial 15NH4-N was immobilized in the respective treatments. When the composts were applied to soil, the mineral N in soil with SSP compost was higher throughout the incubation than in soil with Straw and Lime composts. This was because of higher mineral N content in the SSP compost on application and higher net N mineralization from that compost in the soil. In soil with Straw compost, N mineralization and immobilization were slow or effectively in balance. In soil with Lime compost, net N immobilization was strong in the fi rst 10 d, but then net N mineralization dominated the remaining period of soil incubation. Overall, adding lime before composting reduced the NH4-N content in the compost and the amount available in soil, while adding superphosphate increased the NH4-N content in both. Therefore, superphosphate addition increased the potential fertilizer value of composted pig manure.
U2 - 10.2136/sssaj2012.0200
DO - 10.2136/sssaj2012.0200
M3 - Journal article
AN - SCOPUS:84872504411
VL - 77
SP - 190
EP - 201
JO - Soil Science Society of America Journal
JF - Soil Science Society of America Journal
SN - 0361-5995
IS - 1
ER -
ID: 130098280