Naslov
Computer model for evaluation of plant nutritional and environmental values of organic fertilizers

Autori
Lončarić, Zdenko ; Vukobratović, Marija ; Popović, Brigita ; Karalić, Krunoslav ; Vukobratović, Želimir

Izvornik
Cereal Research Communications (0133-3720) 37 (2009), 41; 617-620

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
environment index ; heavy metal ; limiting factors ; macronutrients ; micronutrients

Sažetak
Organic fertilizers evaluations should describe quality from productivity and environmental points of view. The aim of this paper is to describe computer model for evaluation of organic fertilizers' impact on plant nutrition and environment and to compare plant nutritional and environmental values of different fresh and composted manures. Four different manures (dairy cow manure, horse manure, separated pig manure and chicken manure) were sampled and analyzed for macroelements (N, P, K, Na), micronutrients (Fe, Mn, Zn, Cu, Mo, Ni, Cl) and harmful metals (Cd, Co, Cr, Pb) contents in a fresh manure and after 9 months of composting. In addition to that, C/N and NH4-N/NO3-N ratios were also used for integration of manures properties into Fertilizer Index and Environmental Index. Basic value of Fertilizer Index is product of N-P-K concentrations and ratio, additional values are low C/N and NH4-N/NO3-N ratios, and higher micronutrients contents. Limiting factors are sodium, chloride and hazardous elements' contents. Environmental index is described using contents of toxic elements as limiting factors. Fertilizer index is higher for composted manures indicating higher nutrients concentrations and maturity, but limiting factors as part of environmental index are higher for composts indicating higher heavy metal concentrations. The presented model is sensitive to changes of incorporated fertilizers' properties taking into account thresholds regulated by directives.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

Napomena
Rad je prezentiran na skupu VIII. Alps-Adria
Scientific Workshop “ Ecology and Economy”
održanom od 27.04.-02.05.2009, Neum, Bosna I
Hercegovina.

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