Effect of nitrogen and saccharose on some parameters of radish yield
2000
Kovacik, P. (Slovenska Polnohospodarska Univ., Nitra (Slovak Republic). Katedra Agrochemie a Vyzivy Rastlin)
A two-years small-plot experiment was carried out to investigate the effect of nitrogen nutrition and saccharose foliar application on some characteristics of radish yield. The trial was established in a greenhouse with mechanical air conditioning and irrigation on the soil substrate prepared from loamy orthic luvisol and the Terravita garden soil. It was found that an increasing rate of nitrogen offered to radish plants also caused a rise of the nitrate content in radish bulbs. Nitrogen fertilization influenced a level of nitrates in bulbs more expressively than in leaves. The foliar application of saccharose solution to radish leaves for 12 days before its harvest reduced the nitrate level in radish bulbs. With rational nitrogen fertilization, the fertilizing effect was insignificant, but it was statistically highly significant in case of nitrogen overfertilization. Saccharose application also decreased the nitrate content in leaves, a degree of reduction being higher in the treatment with rational nitrogen dose as compared to that with overdosed nitrogen fertilization. The negative correlation was detected between a rate of nitrogenous fertilizer and the vitamin C content in radish bulbs. Foliar saccharose application softened this adverse effect of N-fertilization on the content of vitamin C. Radish leaves contained less water than bulbs, and dry matter content of radish bulbs was 33% lower in comparison with the data, which have been published so far
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