Hrvatske vode
 
Numeričke oscilacije pronosa izoproturona pri konvencionalnoj obradi tla uz primjenu komposta dobivenog recikliranjem urbanog bio-otpada
Numerical simulations of isoproturon transport in conventional soil cultivation with compost obtained by urban biological waste recycling

Vilim Filipović1, Yves Coquet2, Valérie Pot3, Lana Matijević1, Philippe Cambier3, Sabone Houot3, Pierre Benoit3

Sažetak/Abstract: 

Strukturna heterogenost tla uzrokovana agrotehničkim zahvatima može imati veliki utjecaj na tok vode i  pronos tvari. Glavni cilj rada je bio procijeniti kako prisustvo različitih strukturnih zona u obradivom sloju tla utječe na iniciranje preferencijalnih tokova vode u tlu te procijeniti utjecaj degradacije herbicida izoproturona na dinamiku njegova pronosa. Dugogodišnji podatci s poljskog pokusa (QualiAgro, 2004. – 2010.) na kojem se vrši primjena komposta dobivenog recikliranjem urbanog bio-otpada korišteni su za kalibraciju i verifikaciju numeričkog modela HYDRUS-2D. Tok vode i dinamika izoproturona uspješno su simulirani nakon kalibracije hidrauličkih parametara i temporalne optimizacije brzine degradacije izoproturona. Preferencijalni tokovi su inicirani u međubrazdama uslijed velike poroznosti nastale dodatkom komposta, a kao posljedice usmjeravanja toka okolo zbijenih zona tla. S druge strane, dodatak komposta dobiven recikliranjem kanalizacijskog mulja i zelenog bio-otpada povećao je degradaciju i sorpciju izoproturona u zonama koje su sadržavale najveće količine komposta te se posljedično smanjio i njegov pronos.

 

The structural soil heterogeneity caused by agro-technical measures can have a large impact on water flow and sediment transfer. The main objective of the paper was to evaluate how the presence of different structural zones in the soil’s arable layer affects the initiation of preferential water flows in the soil and to assess the impact of the herbicide isoproturon degradation rate on the dynamics of its transport. Long-period data from the Polish trial (QualiAgro, 2004 - 2010) which applies compost obtained through urban biological waste recycling were used for the calibration and verfication of the numerical model HYDRUS-2D. Water flow and isoproturon dynamics were successfully simulated after the calibration of hydraulic parameters and temporal optimization of the isoproturon degradation rate. Preferential flows occured in interfurrows due to a high compost porosity resulting from the flow’s direction around the soil’s compacted zones. On the other hand, the addition of compost obtained through recycling of sewage sludge and green biological waste increased isoproturon degradation and sorption in areas containing the highest compost amounts, thus reducing its transport.

Kategorija: 
Izvorni (originalni) znanstveni članak / Original Scientific Paper
Ključne riječi/Key words: 

obrada tla, aplikacija komposta, tok vode, pronos izoproturona, numeričko modeliranje, HYDR US-2D

soil cultivation, compost application, water flow, isoproturon transport, numerical modelling, HYDRUS-2D

Podaci o autorima/Authors affiliations: 

1Sveučilište u Zagrebu, Agronomski fakultet, Zavod za melioracije, Svetošimunska 25, 10000 Zagreb, Hrvatska, vfilipovic@agr.hr

 

2Sveučilište u Orleansu, ISTO, UMR 7327, 45071, CNRS/INSU, ISTO, UMR 7327, 45071; BRGM, ISTO, UMR 7327, BP 36009 45060 Orléans, Francuska

 

3UMR ECOSYS, INRA, AgroParisTech, Sveučilište Paris-Saclay, 78850 Thiverval-Grignon, Francuska

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