Browsing by Author "Silva, N. R. N."

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    Effect of nitrogen fertilization on nitrate accumulation in radish (Raphunus sativus) and beetroot (Beta vulgaris)
    (Uva Wellassa University of Sri Lanka, 2015) Lakmali, W. G. S.; Herath, H. M. S.K.; Silva, N. R. N.
    Nitrate is one of the most frequent utilized forms of N from soil and it is the major form of nitrogen taken up by plants. Through root they reach stem and leaf where in photosynthetic processes they convert into proteins. Due to exposure to stress situations and excessive nitrogen fertilization, nitrate accumulation in plant tissues and organs occurs (Krnjaja, 2008). Excess amount of nitrate caused health hazards. Vegetables are the major source of daily intake of nitrate by human beings, supplying about 72 to 94% of the total intake. The Acceptable Daily body weight (Santamaria, 2006). Higher concentration of nitrate is badly affected to environment, animals, and humans. Main objectives of this research are to investigate the effect of nitrogen fertilization on nitrate accumulation in radish and beetroot and to determine plant part where the maximum nitrate accumulations take place. Methodology The current study was carried out at Horticultural Crop Research and Development Institute, Gannoruwa. Five different N levels of DOA (Department of Agriculture) recommended dosages together full recommended TSP and MOP levels were applied as treatments. No fertilizer treatment used as a control. Field trail was arranged according to Randomized Complete Block Design with three replicates. Recommended spacing used for each crop.