N Mineralisation from Bioresources Incubated at 12.5°C

Soils treated with lime-amended biosolids (LAB), poppy seed waste (PSW), anaerobically digested biosolids (ADB) and poppy mulch (PM) and incubated at 12.5°C for 56 days released 45%, 36%, 25%, and −8%, respectively, of total applied N as plant available nitrogen (PAN) by the end of the incubation. T...

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Bibliographic Details
Published in:Applied and Environmental Soil Science 2015, Vol.2015 (2015), p.230-236
Main Authors: Doyle, Richard B., Cotching, W. E., Sparrow, L. A., Ives, S. W., Lisson, Shaun
Format: Article
Language:English
Subjects:
Air temperature
Biosolids
Mineralization
Nitrogen
Nitrogen content
Soil sciences
Soil treatment
Soils
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Summary:Soils treated with lime-amended biosolids (LAB), poppy seed waste (PSW), anaerobically digested biosolids (ADB) and poppy mulch (PM) and incubated at 12.5°C for 56 days released 45%, 36%, 25%, and −8%, respectively, of total applied N as plant available nitrogen (PAN) by the end of the incubation. The mineralisation rates were contrary to expectations based on the C : N ratios of the four products: LAB (5 : 1), PSW (7 : 1), ADB (3 : 1), and PM (16 : 1). PM showed a significant negative priming effect over the incubation period. These results have implications for production agriculture in temperate regions where application and incorporation of bio-resources traditionally occurs in autumn and spring when soil and air temperatures are relatively low. Current application times may not be suitable for nitrogen release to satisfy crop demand.
ISSN:1687-7667
1687-7675
DOI:10.1155/2015/803736