Articles
POTENTIALLY CROP-N SUPPLY FROM DIFFERENT ORGANIC AMENDMENTS TO A SOIL FROM THE LOW VALLEY OF THE RÍO NEGRO PROVINCE, ARGENTINA
Article number
1076_23
Pages
193 – 198
Language
English
Abstract
Soil application of organic amendments provides required nutrients for crop production.
Among organic amendments, there are different forms of N as well as different N quantities.
The objective of this experiment was to evaluate the N crop-supply of different organic amendments.
An aerobic incubation study was conducted with vermicompost of municipal solid waste (V), composted cattle manure with onion residue (CCO) and a commercial organic fertilizer based on poultry manure named BioOrganutsa (BioO). A control was included to calculate the N provided by the soil.
Each organic amendment was thoroughly mixed with the same soil and the application rate was equivalent to 350 kg ha-1 of N. All the mixtures of amendment and soil were incubated during 130 days at 25°C and four wet-drying cycles (30 and 60% water field pore spaces). For all amendments and the control, samples were collected 8 times during the incubation period to determinate NO3--N and NH4+ -N concentration.
The experiment design was split plot.
Across incubation time, BioO showed greater (p<0.05) NO3--N and NH4+ -N concentration compared to the other amendments.
Along incubation time, changes in NO3--N and NH4+ -N concentration were only observed at first sampling time (12 days since the amendment was added). For BioO, NO3--N increased from 23 to 139 mg kg-1 and NH4+ -N decreased from 115 to up to 0 mg kg-1 at first sampling time and then concentration remained constant.
There was time effect on NO3--N + NH4+ -N (Ni) concentrations for V which did not exceed 10 mg kg-1 Ni and CCO values ranging between 20 and 50 mg kg-1 Ni along all incubation cycle.
Among organic amendments, there are different forms of N as well as different N quantities.
The objective of this experiment was to evaluate the N crop-supply of different organic amendments.
An aerobic incubation study was conducted with vermicompost of municipal solid waste (V), composted cattle manure with onion residue (CCO) and a commercial organic fertilizer based on poultry manure named BioOrganutsa (BioO). A control was included to calculate the N provided by the soil.
Each organic amendment was thoroughly mixed with the same soil and the application rate was equivalent to 350 kg ha-1 of N. All the mixtures of amendment and soil were incubated during 130 days at 25°C and four wet-drying cycles (30 and 60% water field pore spaces). For all amendments and the control, samples were collected 8 times during the incubation period to determinate NO3--N and NH4+ -N concentration.
The experiment design was split plot.
Across incubation time, BioO showed greater (p<0.05) NO3--N and NH4+ -N concentration compared to the other amendments.
Along incubation time, changes in NO3--N and NH4+ -N concentration were only observed at first sampling time (12 days since the amendment was added). For BioO, NO3--N increased from 23 to 139 mg kg-1 and NH4+ -N decreased from 115 to up to 0 mg kg-1 at first sampling time and then concentration remained constant.
There was time effect on NO3--N + NH4+ -N (Ni) concentrations for V which did not exceed 10 mg kg-1 Ni and CCO values ranging between 20 and 50 mg kg-1 Ni along all incubation cycle.
Authors
C. Cardoso, G. Laurent, R.A. Rodríguez, A.M. Miglierina, G. Minoldo, N. Dagna, L. Orden
Keywords
compost, clay soil, aerobic incubation
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