Journal of Food, Agriculture and Environment

Action of NPK formulations on concentration of nutrients, photosynthetic pigments, and biochemical responses in Cordyline terminalis plants

Author(s):

Joze Melisa Nunes de Freitas ¹, Roberto Cezar Lobo da Costa ¹, Heliana Silva Brasil ², Allan Klynger da Silva Lobato ³*, Cândido Ferreira de Oliveira Neto ³, Benedito Gomes dos Santos Filho ³, Rosemiro dos Santos Galate ², Milton Hélio Lima da Silva ⁴, Elaine Maria Silva Guedes ³, Douglas José Marques ⁵, Gustavo Antonio Ruffeil Alves ³

Recieved Date: 2012-09-16, Accepted Date: 2013-04-28

Abstract:

Aim of this research was to investigate (i) action of 4 NPK formulations (0-0-0, 4-14-8, 10-10-10, and 15-8-8), measuring (ii) concentration of nutrients and photosynthetic pigments in leaf, and biochemical responses, besides to indicate (iii) better NPK formulation for cordyline terminalis plants (cv. Baby Doll). Experimental design used was completely randomized with 4 NPK formulations (0-0-0, 4-14-8, 10-10-10, and 15-8-8, corresponding in each formulation to nitrogen, phosphorus and potassium, respectively), being used 5 replicates. In this study were determined nitrogen, phosphorus and potassium concentrations in leaf, photosynthetic pigments, nitrate reductase activity in leaf and root, and compounds linked to nitrogen and carbon metabolisms. Nitrate reductase activity in leaf reveals that NPK formulations induce significant effects, and 4-14-8, 10-10-10, and 15-8-8 formulations presented values of 0.11, 0.14, and 0.16 µ mol NO^-2 g^-1 FM h^-1, respectively. Plants exposed to NPK formulations presented significant and better performance that control plants (0-0-0 formulation), presenting higher amounts linked to chlorophylls a, b, total, and carotenoids. Results obtained in this investigation reveal higher accumulation linked to nitrogen, phosphorus, and potassium in leaf for 15-8-8 formulation, as well as this formulation promoted increase in enzyme activity, photosynthetic pigments, and compounds of carbon and nitrogen, if compared to other formulations. Therefore, 15-8-8 formulation is the most indicated for Cordyline terminalis plants.

Keywords:

Cordyline terminalis, nitrate reductase, chlorophylls, proteins

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Journal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 2
Category: Environment
Pages: 1475-1479

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