The effect of slow release fertilizers on the yield and quality of mature strawberry fruit | Vplyv pomaly pôsobiacich hnojív na úrodu a kvalitu zrelých plodov jahôd
Hanková, H., Slovak Univ. of Agriculture in Nitra (Slovak Republic) | Slamka, P.
The effect of slow release fertilizers on the formation of yield and quality of mature fruit was investigated in a pot experiment with strawberries (the 'Darselect variety'). The experiment was established in 2011 within the area of Slovak Agricultural University in Nitra and consisted of six treatments with the same rate of nitrogen (1.65 g per pot) applied through different fertilizers. The first treatment: unfertilized control, the second treatment: quickly soluble fertilizer (DE), the third treatment: slowly acting fertilizer (DC), the fourth treatment: slowly release fertilizer with microelements (DCm), the fifth treatment: a mixture of DE + DC, the sixth treatment: application of urea-formaldehyde condensate. The highest yield of mature strawberry fruit (643.35 g/pot) was harvested from the fourth treatment fertilized by the slow release fertilizer with microelements. The nitrate content in fruits fluctuated from 56 to 65 mg.kg-1 of fresh matter. A significantly lower content of NO3 (37.5 mg.kg-1) was found in the treatment fertilized by urea-formaldehyde condensate. With vitamin C as well as with sugarcontent, the best results were achieved in thetreatment fertilized by the mixture DE + DC; and they were statistically significant in comparison to the other fertilizer treatments.
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