engleski

Results of application of foliar fertilizers Profert Mara, Megagreen and Zeogreen on rapeseed

The paper presents the results of the application of foliar fertilizers (Profert Mara, Megagreen and Zeogreen) upon the three rapeseed varieties in agroecological conditions of northwestern Croatia. The research was conducted through a field experiment which was set up on eutrophic brown anthropogenised soil in Zagreb during 2016/2017 year according to split block method with five replications. Five topdressing treatments were investigated: 1) Control - KAN (54 kg ha-1 N in the first one + 33.75 kg ha-1 N in second topdressing ; 2) KAN (54 kg ha-1 N in the first topdressing) + Profert Mara 10 l ha-1 + Megagreen 2.5 kg ha-1 (first treatment) + Profert Mara 10 l ha-1 + Zeogreen 2.5 kg ha-1 (second treatment after 10 days) ; 3) Profert Mara 10 l ha-1 + Megagreen 2.5 kg ha-1 (treatment in autumn) + Profert Mara 10 l ha-1 + Megagreen 2.5 kg ha-1 (two treatments at intervals of 10 days in spring ) ; 4) Profert Mara 10 l ha-1 + Megagreen 2.5 kg ha-1 (two treatments at intervals of 10 days in spring) ; 5) Profert Mara 10 l ha-1 + Megagreen 2.5 kg ha-1 (first treatment) + Profert Mara 10 l ha-1 + Zeogreen 2.5 kg ha-1 (second application after 10 days) at three varieties of rapeseed (PT 234, PX 113 and Ametyst), with the previous basic fertilization in all variants with 800 kg ha-1 NPK 7:20:30. The hybrid varieties PT 234 and PX 113 had a significantly higher seed and oil yield compared to line cultivar Ametyst. Foliar application with fertilizers Profert Mara, Megagreen and Zeogreen did not result with significant changes in the seed and oil yield compared to the regular topdressing with KAN (54 + 33.75 kg ha-1 N). However, the foliar application of some combinations of researched fertilizers can increase the oil yield of the cultivar Ametyst, which should be examined through multi-year research.

rapeseed, foliar fertilizers, yield, yield components

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