The aim of this study was to evaluate the sustainability of an agro-industry sludge as a nitrogen (N) fertilizer in perennial crops by assessing its dynamics of release of: 1) N as ammonium (NH4+)- and nitrate (NO3−)-N, and 2) carbon as soil respiration. In incubation assay, application of agro-industry sludge promoted the maximum NH4+-N concentration (50 mg kg−1) 2 h after application, then it decreased with time until day 26. NO3−-N increased, reaching the maximum between day 60 and day 100, according to a second degree function. Agro-industry sludge showed a slower release of NO3−-N compared with urea. Soil basal respiration and cumulative amount of carbon dioxide were higher in sludge from day 71 on. In field, soil NO3−-N increased after fertilization treatments and was higher in Calcari Stagnic Cambisols soil. Sludge showed a potential lower environment impact in terms of mineral N release, than urea.
Agro-industry sludge as a potential organic fertilizer for a prompt nitrogen release / Toselli, M.; Marcolini, G.; Baldi, E.; Quartieri, M.; Sorrenti, G.; Muzzi, E.; Innocenti, A; DAL RE, L.. - In: COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS. - ISSN 0010-3624. - STAMPA. - 48:9(2017), pp. 999-1007. [10.1080/00103624.2017.1323084]
Agro-industry sludge as a potential organic fertilizer for a prompt nitrogen release
TOSELLI M.;MARCOLINI G.;BALDI E.;QUARTIERI M.;SORRENTI G.;MUZZI E.;
2017
Abstract
The aim of this study was to evaluate the sustainability of an agro-industry sludge as a nitrogen (N) fertilizer in perennial crops by assessing its dynamics of release of: 1) N as ammonium (NH4+)- and nitrate (NO3−)-N, and 2) carbon as soil respiration. In incubation assay, application of agro-industry sludge promoted the maximum NH4+-N concentration (50 mg kg−1) 2 h after application, then it decreased with time until day 26. NO3−-N increased, reaching the maximum between day 60 and day 100, according to a second degree function. Agro-industry sludge showed a slower release of NO3−-N compared with urea. Soil basal respiration and cumulative amount of carbon dioxide were higher in sludge from day 71 on. In field, soil NO3−-N increased after fertilization treatments and was higher in Calcari Stagnic Cambisols soil. Sludge showed a potential lower environment impact in terms of mineral N release, than urea.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
