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Produtividade da cana-de-açúcar após o cultivo de leguminosas

Authors: Ambrosano, Edmilson José; Cantarella, Heitor; Ambrosano, Gláucia Maria Bovi; Schammas, Eliana Aparecida; Dias, Fábio Luis Ferreira; Rossi, Fabrício; Trivelin, Paulo Cesar Ocheuze; +3 Authors

Produtividade da cana-de-açúcar após o cultivo de leguminosas

Abstract

Estudou-se o efeito do cultivo prévio de leguminosas sobre a produtividade e lucratividade da cana-de-açúcar. Foram determinados a produtividade de biomassa, o acúmulo de nutrientes das leguminosas, a ocorrência natural de fungos micorrízicos arbusculares, bem como o efeito das leguminosas sobre a população de nematoides do gênero Pratylenchus à cana-de-açúcar. O experimento foi desenvolvido em Piracicaba (SP), Brasil, em solo classificado como Argissolo Vermelho-Amarelo distrófico, utilizando-se a cultivar de cana-de-açúcar (Saccharum spp.) IAC87-3396. As avaliações dos efeitos do cultivo prévio das leguminosas foram realizadas durante cinco cortes consecutivos. Os tratamentos consistiram do cultivo prévio das leguminosas: Amendoim (Arachis hypogaea L) - cultivares IAC-Tatu e IAC-Caiapó, crotalária júncea IAC 1 (Crotalaria juncea L) e mucuna preta [Mucuna aterrima (Piper & Tracy) Holland], e um tratamento-testemunha. Adotou-se o delineamento em blocos casualizados com cinco repetições. A leguminosa mais produtiva de biomassa seca (parte aérea+raízes) foi a crotalária júncea IAC 1 (10.264 kg ha-1), seguida da mucuna preta (4.391 kg ha-1) e dos amendoins, IAC-Caiapó (3.177 kg ha-1) e IAC-Tatu (1.965 kg ha-1). O amendoim IAC-Caiapó e a mucuna preta foram as espécies mais infectadas por fungos micorrízicos. O amendoim, independente da cultivar, foi a leguminosa que mais reduziu a infestação de Pratylenchus spp. na cana-de-açúcar. Após cinco cortes da cana-de-açúcar o melhor desempenho foi notado no tratamento com cultivo prévio de crotalária júncea IAC 1, o qual promoveu incrementos de 30% e 35% na produtividade de colmos e de açúcar respectivamente e o melhor desempenho econômico.

Keywords

Saccharum spp., Mucuna aterrina (Piper & Tracy) Holland, green manure, Crotalaria juncea L., Mucuna aterrima (Piper & Tracy) Holland, Mucuna aterrima (Piper & Tracy) Holland, Arachis hypogaea L., adubos verdes, Pratylenchus spp., Mucuna aterrima

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selected citations
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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).
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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.
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