Melhorando o cultivo de nabo com bactérias promotoras do crescimento de plantas em fertilizantes orgânicos

Autores

DOI:

https://doi.org/10.1590/1983-21252025v3812843rc

Palavras-chave:

Brassica rapa var. Chinensis. Paenibacillus polymyxa. Azospirillum sp. Biofertilização.

Resumo

A utilização de bactérias promotoras de crescimento de plantas (PGPB) é considerada uma alternativa viável aos fertilizantes químicos, visando o desafio de produzir alimentos com mínimo impacto ambiental. Este estudo avaliou o efeito de Paenibacillus polymyxa e Azospirillum sp. como inoculantes em digestato anaeróbico e composto no cultivo de Brassica rapa var. Chinensis (acelga chinesa). Foram realizados doze tratamentos, incluindo controle sem fertilização, utilizando um delineamento em blocos ao acaso (DBC) com quatro repetições por tratamento. O volume total da solução foi composto pela diluição do inóculo concentrado em água, melaço e digestato anaeróbico nas seguintes proporções: 10% de biol ou melaço, 89,65% de água de irrigação e 0,4% das cepas de Paenibacillus polymyxa e Azospirillum sp., com concentração de 1x10⁹ UFC g⁻¹ em uma dosagem de 700 g por 200 L de água. Os resultados mais favoráveis nas variáveis agronômicas da acelga chinesa aos 55 dias foram alcançados com o tratamento que utilizou inóculo em composto (T8), composto por 3 kg de composto, 0,4% de Paenibacillus polymyxa e 10% de melaço, obtendo valores máximos em altura de planta (52,42 cm), comprimento de folha (49,77 cm), largura de folha (19,85 cm), área foliar (958,08 cm²), número de folhas por planta (19,85) e peso fresco (293,65 g). Portanto, o uso de fertilizantes orgânicos inoculados com microrganismos é uma alternativa promissora para melhorar o crescimento de culturas de acelga chinesa e reduzir a dependência de fertilizantes químicos, que impactam negativamente o meio ambiente.

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Publicado

05-12-2024

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Artigo Científico