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

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

Dalmo Lopes de Siqueira, Dierlei dos Santos, Cicero Cartaxo de Lucena, Daniel Lucas Magalhães Machado, Tiago Barbosa Struiving, Pedro Henrique Monteiro Matarazzo

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.

2011

Adubação, Citrus limonia L. Osbeck, fertilizante orgânico

10.1590/S0034-737X2011000300017

Revista Ceres

Universidade Federal de Viçosa

Agriculture (General), Biotechnology