engleski

The impact of substrate and fertilization on growth and development of Viola odorata L.

In order to achieve more successful breeding of the sweet violet, special attention should be given to the substrate and fertilization since nitrogen affects the foliage mass, and phosphorus, calcium and magnesium affect the quality. Better results are achieved when plant species are grown in peat-based substrates than in soil-based. With the aim to obtain better information about selecting the most favourable substrate and the optimal dose of fertilizer, an investigation was conducted with five different types of commercial substrates, garden soil and soil from natural habitats and the foliar nutrition in four fertilization treatments (control, 0.1% NPK-Mg, 0.2% NPK-Mg and 0.2% NPK- Mg + 4% MgSO4). Chemical analysis of the soil showed that the soil with less organic matter, higher pH reaction and richer in potassium compared to a commercial substrate. The results of the measurements show that the plants grown in soil were larger in diameter and height. Fertilization increased plant diameter by 6%, while plant height was not affected. Selection of the most appropriate substrate and optimal fertilization indirectly reduce the destruction of this nutritionally valuable and ornamental plant species in its natural habitats.

growing media ; morphometric properties ; colour of leaves

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