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Effects of graded nitrogen levels on leaf nitrogen content of cordyline (Cordyline fruticosa var. ‘purple compacta’) in Batticaloa district, Sri Lanka

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Author Affiliations

  • 1Department of Crop Science, Faculty of Agriculture, Eastern University, Vantharumoolai, Sri Lanka
  • 2Department of Crop Science, Faculty of Agriculture, Eastern University, Vantharumoolai, Sri Lanka
  • 3Department of Crop Science, Faculty of Agriculture, Eastern University, Vantharumoolai, Sri Lanka

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

Abstract

Cordyline is a famous foliage plant with great demand in the global markets as cut decorative foliage. Nitrogen has significant effects on the leaf nitrogen content of foliage plants. A shade house (50%) experiment was carried out to determine the effects of graded nitrogen levels on the leaf nitrogen content of cordyline (Cordyline fruticosa, variety ‘purple compacta’) plants in the Eastern University, Sri Lanka from July 2017 to November 2017. Completely randomized design was used as experimental arrangement. Five treatments were defined viz. 0.5(T1), 1.0 (T2), 1.5 (T3), 2.0 (T4) and 2.5 (T5) g nitrogen/plant/month (g/p/m) and each treatment consisted of twenty replications. Phosphorous and Potassium levels were kept constant throughout the experiment. Urea was used as a nitrogen source. Urea was applied at monthly interval as a split application. Agronomic practices were done uniformly for all treatments according to the recommendations. Leaf nitrogen content was measured by SPAD meter at monthly interval. Measured data was analysed significantly (p < 0.05) by performing Analysis of Variance to determine significant differences among treatments. Results shown that plants belong to T1 (nitrogen level 0.5g/p/m) showed significantly (p < 0.05) higher leaf nitrogen content (SPAD value), while the lowest leaf nitrogen content was observed in T5 at 3 months after transplanting. From this study, it was found that, leaf nitrogen content decreased with increasing level of nitrogen application in Cordyline fruticosa var. ‘purple compacta’ at 50% shade level.

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