The use of nitrogenous fertilizers in integrated production of apples in variety \u27Gala\u27

V letih 2007 in 2009 smo na Univerzitetnem kmetijskem centru Maribor in Sadjarskem centru Maribor – Gačnik ugotavljali vpliv dušika v integrirani pridelavi jabolk sorte \u27Gala\u27 na generativne in vegetativne parametre jablan ter kakovost pridelka. Jablane smo gnojili z gnojiloma KAN in Biosol v različnih kombinacijah ob različnih vegetativnih stadijih. Poskus je bil postavljen po sistemu 4 blokov, ki so vključevali 5 obravnavanj. Prvo obravnavanje je predstavljalo standardno gnojenje po IPS 335 kg KAN/ha, drugo obravnavanje je bilo jesensko gnojenje z organskim gnojilom 1125 kg Biosola/ha, tretje obravnavanje je bilo kombinacija spomladanskega in jesenskega gnojenja s 167 kg KAN/ha in 625 kg Biosola/ha, četrto obravnavanje je bilo spomladansko gnojenje z organskim gnojilom s 1125 kg Biosola/ha, peto obravnavanje je kombinacija spomladanskega gnojenja s 167 kg KAN/ha in 625 kg Biosola/ha. Na lokaciji UKC Pohorski dvor je najboljše rezultate glede generativnih in vegetativnih parametrov dala kombinirana uporaba gnojil Biosol + KAN (3. in 5. obravnavanje). Na lokaciji SC Maribor – Gačnik smo pri generativnih in vegetativnih podatkih dobili najboljše rezultate z uporabo Biosola v jesenskem času (2. obravnavanje). Za doseganje najvišjega odstotka v I. kakovostnem razredu je najboljše gnojiti spomladi s kombinacijo gnojil Biosol + KAN.In the years 2007 and 2009 we tested the effects of nitrogen in an integrated production of apples variety \u27Gala\u27. All the experiments were taking place at the premises of the University Agricultural Center Maribor and Fruit-growing Centre Gačnik - Maribor. The apples were fertilized with KAN and Biosol fertilizers in various combinations at diferent vegetative stages. The experiment was designed as a system of four blocks, which included five treatments. The first treatmant reprezents standard fertilization by IPS 335 kg KAN/ha, the second treatment was an auttumn fertilization with 1125 kg Biosol/ha organic fertilizer, the third treatment was a combination of spring and autumn fertilization with 167 kg KAN/ha and 625 kg Biosol/ha fertilizers, the fourth treatment was a spring fertilization with 1125 kg Biosol /ha organic fertilizer and the fifth treatment was a combination of spring fertilization with 167 kg KAN/ha and 625 kg Biosol/ha fertilizers. We got the best generative, vegetative and qualitative results with a combination of Biosol + KAN fertilizers in the third and fifth treatment located at UKC “Pohorski dvor”. On the other hand, we got the best generative and vegetative results by using Biosol fertilizer in autumn in the second treatment located at SC Maribor – Gačnik. To get qualitative results the best is to fertilize in spring time with a combination of Biosol and KAN fertilizers