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Ciência e Agrotecnologia
Article . 2006
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Efeitos de nitrogênio, fósforo e potássio no crescimento de Rhapis excelsa (Thunberg) Henry ex. Rehder (Palmeira-Ráfia) Effects of nitrogen, phosphorus and potassium on early growth of seedlings of Rhapis Excelsa (Thunberg) Henry ex. Rehder (Lady Palm)

Authors: Petterson Baptista da Luz; Armando Reis Tavares; Patrícia Duarte de Oliveira Paiva; Leandro Antonio Lyra Massoli; Francismar Francisco Alves Aguiar; Shoey Kanashiro; Giulio Cesare Stancato; +1 Authors

Efeitos de nitrogênio, fósforo e potássio no crescimento de Rhapis excelsa (Thunberg) Henry ex. Rehder (Palmeira-Ráfia) Effects of nitrogen, phosphorus and potassium on early growth of seedlings of Rhapis Excelsa (Thunberg) Henry ex. Rehder (Lady Palm)

Abstract

Rhapis excelsa é uma das palmeiras ornamentais mais cultivadas no mundo, indicadas principalmente para vasos e áreas de sombra. A maioria das palmeiras apresenta crescimento lento. O objetivo deste estudo é acelerar o processo de produção de mudas. Analisaram-se os efeitos da adubação realizada com nitrogênio, fósforo e potássio, sob o crescimento da espécie, ao longo de 8 meses. As mudas com altura de 3,80 cm foram plantadas em substrato constituído de partes iguais de terra e vermiculita. Realizaram-se aplicações semanais de NPK, diretamente no solo, na concentração de 10 mg.L-1 de substrato, utilizando-se como fonte: MAP (P), sulfato de amônio (N) e cloreto de potássio (K). Os tratamentos foram constituídos de todas as combinações possíveis destes nutrientes, mais uma testemunha. O experimento foi mantido em casa-de-vegetação com nebulização. Avaliaram-se os resultados com base na produção de matéria seca da parte aérea e das raízes, área foliar, diâmetro do caule, número de folhas e altura do estipe. O nutriente que proporcionou um maior desenvolvimento e crescimento da palmeira Rhapis excelsa foi o nitrogênio, influenciando de forma positiva na maioria dos parâmetros analisados. Verificou-se melhor desenvolvimento das mudas com a aplicação de N, independente da combinação com P e ou K.Rhapis excelsa is one of the most cultivated ornamental palms of the world, indicated for cultivation in pots and under shadow. Most of the palm trees present slow growth. The objective of this study was to investigate the influence of fertilization on acceleration of palm seedlings production. The effects of nitrogen, phosphorus and potassium fertilizers on the growth of seedlings of this specie, during 8 months, were investigated in this work. Seedlings with 3.80 cm of height were cultivated in a substrate constituted of equal parts of soil and vermiculite. Applications of NPK were made weekly, at the concentration of 10 mg.L-1 of substrate, using MAP, ammonium sulphate and potassium chloride. The treatments were composed of all combinations of these mineral nutrients plus one control. The experiment was carried out in a green house with sprinkles. Dry weight production of shoots and roots, leaf area, stalk diameter, number of leaves and plant height were measured. Nitrogen fertilization increased the development and growth of the seedlings, raising most of the analyzed parameters. Better seedling development was observed with application of N, but there was no correlation between N and P or K application.

Keywords

fertilizers, Agriculture (General), adubação, produção de mudas, Rhapis excelsa, production of seedlings, S1-972

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
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