Effect of Five Levels of Nitrogen at Six Shade Intensities on Growth and Leaf-Nutrient Composition of Dracaena deremensis 'Warneckii,' Engler.
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Rodríguez, S. J., & Cibes, H. R. (1977). Effect of Five Levels of Nitrogen at Six Shade Intensities on Growth and Leaf-Nutrient Composition of Dracaena deremensis ’Warneckii,’ Engler. The Journal of Agriculture of the University of Puerto Rico, 61(3), 305–313. https://doi.org/10.46429/jaupr.v61i3.10428

Abstract

Rooted cuttings of Dracaena deremensis 'Warneckii,' Engler were grown at five N levels (0, 64, 120, 192 and 256 p/m) and six shade intensities (full sunlight, 47, 51, 63, 76 and 92% actual shade). The number of leaves, and length and weight of plants were significantly affected by N levels. The fitting of the yield-nutrient relationship curve Y = A/1 + B(C-X)2 revealed maximum expected values at N levels of 164 to 210 p/m depending on the shade intensity. An increase in N increased leaf N and decreased K, especially at the full sunlight and 47% shade levels. Leaf K content tended to level off at 64 p/m of N application at shade levels over 47%. P and Fe content were not affected markedly by N levels. At 92% shade appearance of the plants was superior to that at other shade levels.

https://doi.org/10.46429/jaupr.v61i3.10428
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