Simulacija pridelka riža s CropSyst modelom pri različnih režimih namakanja in gnojenja

Narjes ZARE, Mohammadreza KHALEDIAN, Nader PIRMORADIAN, Mojtaba REZAEI

Povzetek


Namen te raziskave sta bili kalibracija in validacija CropSyst modela za pridelovanje riža v Rashtu (Iran). Podatki za obdelavo izvirajo iz poljskega split-plot poskusa, ki je potekal v letih 2005-2007. Glavne ploskve so bile namakane, vključno z neprekinjenim poplavnim namakanjem v petdnevnih intervalih. Podploskve so imele štiri režime gnojenja z dušikom in sicer: 0 N –brez dušika, 45, 60 in 75 kg N ha-1. Normalizirana vrednost korena povprečnih kvadriranih napak (Normalized Root Mean Squared Error;nRMSE) in koeficient mase ostankov (Coefficient of Residual Mass; Crm) sta v kalibracijskih letih sta znašala 9.3 % in 0.06 %. V validacijskem letu sta omenjena parametra znašala (nRMSE in Crm) 9.7 % in 0.11 %. Glede na druge kazalnike ocenjevanja namakanja in gnojenja je bil tudi okoljsko najprimernejši tretma petdnevno namakanje in gnojenje s 45 kg N ha-1.

Ključne besede


riž; pridelovalni model; namakanje; gnojenje; simulacija pridelka

Celotno besedilo:

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Literatura


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DOI: http://dx.doi.org/10.14720/aas.2014.103.2.3

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