RESPONSE OF SOME CONTAINER-TYPE CROPPED CONIFEROUS AND DECIDUOUS SPECIES TO APPLICATION OF FERTILIZER AND OTHER NUTRIENTS

C. Gavat, L.M. Dumitru, M. Trandafirescu, G. Caretu
Container-type culture of ornamental plants is widespread, so it is necessary to find the best solutions to grow them under optimum conditions. Fertilizers are an important part for the success of ornamental plants at a high level. Consequently, it is necessary to clarify different aspects about applying fertilizers in order to find the best fertilizer application patterns. During 2000–2003, some coniferous and deciduous species were studied here: Juniperus virginiana 'Skyrocket', Thuja occidentalis 'Danica', Berberis thunbergii 'Atropurpurea', Euonymus fortunei ‘Emerald’n Gold’ and Ligustrum ovalifolium. As substrates, two mixtures were used in this experiment: (S1) – consisting of leaf-derived soil, virgin soil, peat, and sand, in the proportion of: 1: 1: 1: 0.5; and (S2) – a light mixture of forestry compost and perlite in the ratio of 3: 1, without peat. Nutrients were incorporated into the substrates before planting in containers as NPK fertilizers in some treatments, and as nutrient (Coic's solution) for watering plants during the growing season in other treatments. Substrates were analyzed to determine the content of the most important nutrients (NPK), the content of soluble salts, as well as the pH level. Growth of plants was measured during the growing season (height, root neck diameter and number of shoots). The average annual increase in height showed that the highest values were obtained in the fertilizer application treatments and Coic's solution as well, as effect of an addition of nutrients versus the unfertilized control mixtures. The average annual increase in root neck diameter showed again a higher growth for the fertilizer application treatments in the case of all plants studied, but this growth was somewhat inconsistent and, in comparison with height, the effect of fertilizer application was lower and only partial significant for the increase in root neck diameter. Both the NPK complex fertilizer application and Coic’s solution application showed a better influence for the plant growth represented by the number of shoots in the case of the conifers studied; however, smaller and only partial significant differences were noticed within the deciduous shrubs as a combined effect of both fertilizer application and substrates used.
Gavat, C., Dumitru, L.M., Trandafirescu, M. and Caretu, G. (2008). RESPONSE OF SOME CONTAINER-TYPE CROPPED CONIFEROUS AND DECIDUOUS SPECIES TO APPLICATION OF FERTILIZER AND OTHER NUTRIENTS. Acta Hortic. 779, 497-504
DOI: 10.17660/ActaHortic.2008.779.63
https://doi.org/10.17660/ActaHortic.2008.779.63
ornamental plants, fertilizer application pattern, substrate
English

Acta Horticulturae