Gross and net rates of nitrogen mineralisation in soil amended with composted olive mill pomace

TY - JOUR

T1 - Gross and net rates of nitrogen mineralisation in soil amended with composted olive mill pomace

AU - Gomez Muñoz, Beatriz

AU - Hatch, D. J.

AU - Bol, R.

AU - Dixon, E. R.

AU - García-Ruiz, R.

PY - 2011

Y1 - 2011

N2 - Olive mill pomace is the major waste product in the olive oil industry and composting these by-products for the purpose of recycling nutrients and organic matter is a sound environmental strategy. Yet little is known about the quantity and timing of nitrogen (N) release from composted olive mill pomace. This paper assesses both gross (using the 15N dilution technique) and net (aerobic incubation) nitrogen (N) mineralisation and N2O emissions of soil amended with seven commercially available composts of olive mill pomace (COMP). All are currently produced in Andalusia and differ in the proportions of raw materials co-composted with the pomace. The absence of significant differences in net N or gross mineralisation and nitrification in COMP-amended soil compared with a control, except for COMP combined with poultry manure, highlighted the recalcitrant nature of the COMP-N. Applications of COMP are hence unlikely to supply available N in available forms, at least in the short-term. Furthermore, N2O emissions from COMP-amended soil were negligible and, therefore, applications in the field should not result in increased N loss through denitrification.

AB - Olive mill pomace is the major waste product in the olive oil industry and composting these by-products for the purpose of recycling nutrients and organic matter is a sound environmental strategy. Yet little is known about the quantity and timing of nitrogen (N) release from composted olive mill pomace. This paper assesses both gross (using the 15N dilution technique) and net (aerobic incubation) nitrogen (N) mineralisation and N2O emissions of soil amended with seven commercially available composts of olive mill pomace (COMP). All are currently produced in Andalusia and differ in the proportions of raw materials co-composted with the pomace. The absence of significant differences in net N or gross mineralisation and nitrification in COMP-amended soil compared with a control, except for COMP combined with poultry manure, highlighted the recalcitrant nature of the COMP-N. Applications of COMP are hence unlikely to supply available N in available forms, at least in the short-term. Furthermore, N2O emissions from COMP-amended soil were negligible and, therefore, applications in the field should not result in increased N loss through denitrification.

U2 - 10.1002/rcm.4849

DO - 10.1002/rcm.4849

M3 - Journal article

C2 - 21594919

AN - SCOPUS:79956291845

SN - 0951-4198

VL - 25

SP - 1472

EP - 1478

JO - Rapid Communications in Mass Spectrometry

JF - Rapid Communications in Mass Spectrometry

IS - 11

ER -