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Effect of Nitrogen Concentration and Feeding Period on Growth and Flowering in Hydroponics of Ardisia pusilla  

Kil, Mi-Jung (Floriculture Research Division, National Institute of Horticultural & Herbal Science, Rural Development Administration)
Huh, Yeun-Joo (Floriculture Research Division, National Institute of Horticultural & Herbal Science, Rural Development Administration)
Choi, Seong-Youl (Floriculture Research Division, National Institute of Horticultural & Herbal Science, Rural Development Administration)
Lim, Jin-Hee (Floriculture Research Division, National Institute of Horticultural & Herbal Science, Rural Development Administration)
Park, Sang-Kun (Floriculture Research Division, National Institute of Horticultural & Herbal Science, Rural Development Administration)
Shim, Myung-Syun (Dep. of Horticulture and Education, Korea National Arboretum)
Publication Information
Journal of Bio-Environment Control / v.19, no.4, 2010 , pp. 257-265 More about this Journal
Abstract
The objective of study was carried out to investigate the proper nutrient nitrogen concentration and irrigation period for increasing plant growth and flowering in Ardisia pusilla. Nutrient nitrogen concentrations were 120, 150, 180 and $210\;mg{\cdot}L^{-1}$ and they were based on the Sonneveld solution. Irrigation periods were divided into ED (except dormancy) and TG (total growth) according to plant age. The results of plant age and irrigation period, growth of 1 year-old plant was promoted by nitrogen concentration above $150\;mg{\cdot}L^{-1}$ regardless of irrigation period. And plant growth values of 2 years-old in TG treatments were higher than ED treatments, especially TG-180 treatment was best of all. The contents of total nitrogen of leaves after flowering were increased with nutrient nitrogen strength. And the contents of potassium, calcium, magnesium and phosphate slightly were decreased or were no significant differences. Plant growth and flowering decreased when nitrogen concentration was over $210\;mg{\cdot}L^{-1}$. Therefore, TG-150 and TG-180 were supposed to be appropriate treatment for plant growth and flowering of 1year-old plant and 2 years old plant, respectively.
Keywords
dormancy period; EC level; ion; plant age;
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