Produção Nacional
Revisado por pares
Slow-release and organic fertilizers on early growth of Rangpur lime
2011; UNIVERSIDADE FEDERAL DE VIÇOSA; Volume: 58; Issue: 3 Linguagem: Inglês
10.1590/s0034-737x2011000300017
ISSN2177-3491
AutoresDaniel Lucas Magalhães Machado, Cícero Cartaxo de Lucena, Dierlei dos Santos, Dalmo Lopes de Siqueira, Pedro Henrique Monteiro Matarazzo, Tiago Barbosa Struiving,
Tópico(s)Polymer-Based Agricultural Enhancements
ResumoSlow-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.
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