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Nitrogen mineralization from mature bio‐waste compost in vineyard soils. I. Long‐term laboratory incubation experiments
Author(s) -
Nendel Claas,
Reuter Stephan,
Kubiak Roland,
Nieder Rolf
Publication year - 2004
Publication title -
journal of plant nutrition and soil science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 87
eISSN - 1522-2624
pISSN - 1436-8730
DOI - 10.1002/jpln.200320362
Subject(s) - compost , mineralization (soil science) , vineyard , nitrogen , soil water , nitrogen cycle , incubation , agronomy , chemistry , fertilizer , environmental science , environmental chemistry , zoology , horticulture , soil science , biology , biochemistry , organic chemistry
Abstract The steadily increasing utilization of bio‐waste compost in German viticulture requires a more detailed investigation of nitrogen (N) mineralization parameters for mature bio‐waste compost applied to vineyard soils. N mineralization kinetics were described with two superposing exponential equations. Long‐term aerobic laboratory incubation experiments of 12 soil‐compost substrates revealed that 5±2.8% of its total N content could be released from a rapidly decomposable fraction (half‐life period t 50 = 41 d at 15°C) and another 60±2.9% from a slower decomposable fraction (t 50 = 490 d). The remaining proportion (35%) is considered not to be released in the medium term. The obtained potentially mineralizable nitrogen of 65% of total compost N significantly differs from current fertilizer recommendations, which were adopted from calculations for agricultural conditions. For fertilizer recommendations in viticulture, we recommend the consideration of a higher N‐mineralization potential for organic fertilizers.