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Growth Responses of Various Ornamental Foliage Plants According to the Amount of Nitrogen Application  

Shim, Myung Syun (Department of Horticulture and Education, Korea National Arboretum)
Kil, Mi Jung (Floriculture Research Division, National Institute of Horticultural & Herbal Science, Rural Development Administration)
Publication Information
Journal of Bio-Environment Control / v.21, no.4, 2012 , pp. 485-490 More about this Journal
Abstract
This study was carried out to investigate the plant growth of various foliage plants affected by the amount of nitrogen application. There was not an accurate criterion for fertilization to each foliage plant. Moreover, the foliage plants grow slowly during the early stage and this period must be shortened for commercial production. Ficus benjamina, Hedera helix, Philodendron tatei, Rhapis excelsa, and Spathiphyllum spp. were used in this experiment. Nutrient nitrogen concentrations were 120, 150, 180, and $210mg{\cdot}L^{-1}$ (N1, N2, N3, N4) and they were based on the Sonneveld solution. Plant height and width, leaf number, leaf area, fresh and dry weights of shoots were measured for 8 weeks to compare the responses to the different treatments. The nitrogen contents of various plant parts were also analyzed. The growth of Ficus and Hedera was improved at the N1 treatment and that of Philodendron, Rhapis and Spathiphyllum at N4 treatment. The required amounts for nitrogen nutrients were different among the various foliage plants. The nitrogen treatments had no effects on SPAD values and there were no correlations between nitrogen treatments and nitrogen contents of plant parts. Therefore, the various foliage plants should supply with each proper nitrogen treatments to grow faster with better quality. In this case, the plant growth played a more important role than nitrogen levels of plant parts in deciding the proper nitrogen levels for each foliage plant.
Keywords
Ficus benjamina; Hedera helix; Philodendron tatei; Rhapis excelsa; Spathiphyllum spp.;
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