Slow-release and organic fertilizers on early growth of Rangpur lime

Slow-release and organic fertilizers are promising alternatives to conventional fertilizers, as both reduce losses by leaching, volatilization and problems of toxicity and/or salinity to plants. The objective of this work was to evaluate the effect of different rates of the organic fertilizer Humato-Macota® compared with the slow-release fertilizer Osmocote® on the growth and nitrogen content in the dry matter of Rangpur lime. A field experiment was conducted in a factorial completely randomized design with an additional treatment (4 x 4 +1). The first factor consisted of four Humato­Macota® rates (0, 1, 2, and 3%) applied to the substrate; the second factor consisted of the same Humato-Macota® concentrations, but applied as fortnightly foliar sprays; the additional treatment consisted of application of 5 kgm-3 Osmocote® 18-05-09. Means of all growth characteristics (plant height, total dry matter, root/shoot ratio and leaf area) and the potential quantum yield of photosystem II (Fv/Fm) were higher when plants were fertilized with the slow-release fertilizer. The organic fertilizer applied alone did not meet the N requirement of Rangpur lime.

Bibliographic Details

Main Authors:	Machado,Daniel Lucas Magalhães, Lucena,Cícero Cartaxo de, Santos,Dierlei dos, Siqueira,Dalmo Lopes de, Matarazzo,Pedro Henrique Monteiro, Struiving,Tiago Barbosa
Format:	Digital revista
Language:	English
Published:	Universidade Federal de Viçosa 2011
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0034-737X2011000300017
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