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Influence of nitrogen levels on Dracaena sanderiana L. varieties in dry zone, Sri Lanka

Author Affiliations

  • 1Department of Crop Science, Faculty of Agriculture, Eastern University, Vantharumoolai, Sri Lanka
  • 2Department of Crop Science, Faculty of Agriculture, University of Peradeniya, Peradeniya, Sri Lanka and Dept. of Biotechnology, Faculty of Science, Horizon Campus, Malabe, Sri Lanka
  • 3Department of Crop Science, Faculty of Agriculture, Eastern University, Vantharumoolai, Sri Lanka

Res. J. Agriculture & Forestry Sci., Volume 6, Issue (9), Pages 1-7, September,8 (2018)

Abstract

An experiment was carried out to determine the effect of graded nitrogen levels on three dracaena (Dracaena sanderiana L.) varieties viz. ‘Gold’, ‘Victory’ and ‘White’ at the Eastern University, Sri Lanka . Plants were grown at 70% shade house. Nitrogen doses used were 0.5, 1.0, 1.5, 2.0 g/plant/ month. Completely randomized design was used as experimental arrangement. Measurements were taken at monthly interval and data were analyzed statistically. The results revealed that dracaena varieties showed highest performances in measured growth parameters such as plant height, leaf area and plant biomass at 1.0 and 1.5 g/plant/month nitrogen levels significantly (p<0.05). Lower (0.5g/plant/month) and higher (2.0 g/plant/month) nitrogen levels reduced the growth of dracaena varieties. Polynomial regression analysis showed that, optimum nitrogen level for maximum biomass production of dracaena varieties is in the range of 1.11 – 1.15 g/plant/month. Therefore, this experiment concluded that, nitrogen in the range of 1.11 – 1.15 g/plant/month is optimum for the growth of dracaena varieties in the dry zone, Sri Lanka at 70% shade level.

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