Avaliação do desenvolvimento inicial de cana-de-açúcar promovido por inoculantes bacterianos e subprodutos
Carregando...
Data
2017-02-16
Autores
Mendes-Santos, Roberta [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Estadual Paulista (Unesp)
Resumo
Bactérias promotoras do crescimento de plantas podem promover aumento na biometria vegetal, na absorção de nutrientes e sua atuação pode ser incrementada pela disponibilização de carbono e energia, fornecidos via adubação. Desta forma, o experimento foi conduzido com o objetivo de avaliar o efeito dos Bacillus subtilis e Bacillus pumilus em mudas pré-brotadas (MPB) de cana-de-açúcar e ação das mesmas bactérias associadas à adubação com vinhaça, torta de filtro e o composto de torta de filtro no cultivo inicial de cana-de- açúcar em vasos ao ar livre. O experimento foi dividido em duas fases. Na fase 1 foram utilizadas MPB e os tratamentos constituídos por: T1= Sem inóculo, T2= B. subtilis, T3= B. pumilus e T4= B. subtilis + B. pumilus, realizado em delineamento em blocos ao acaso, com quatro repetições. No final do período de formação das MPB que foi de 60 dias, foram aferidas as massas seca de parte aérea, de raízes e total e ainda feita contagem do número de bactérias totais no substrato. Na fase 2, os fatores em estudo foram quatro inoculações, sendo T1= Sem inóculo, T2= B. subtilis, T3= B. pumilus e T4= B. subtilis + B. pumilus com quatro tipos de adubações: A1= Adubação mineral (AM), A2= AM + vinhaça, A3= AM + torta de filtro e A4= AM + composto de torta de filtro, combinados em esquema fatorial 4x4, com quatro repetições. Os parâmetros avaliados foram: dados biométricos das plantas, massa seca de parte aérea, raízes e total, contagem do número de bactérias totais, fósforo solúvel, amônio e nitrato no solo. Na fase de MPB o uso das bactérias promoveu aumento de massa seca de raízes e total. Na fase em vasos, os tratamentos que receberam os inóculos, tiveram incremento na altura e diâmetro das plantas com destaque para o B. pumilus que proporcionou também maior massa seca de raízes e total. Nas análises realizadas no solo, observou-se que a adição das bactérias promoveu uma menor concentração de nutrientes no solo e provavelmente uma maior assimilação pelas plantas. Os tratamentos que receberam vinhaça associada à adubação mineral prejudicaram o desenvolvimento das plantas com menores valores para os dados biométricos e menor massa seca de todas as partes da planta, enquanto que no solo aumentou a concentração de amônio e número de bactérias totais. A inoculação bacteriana em MPB e em plantas de cana-de-açúcar no seu período inicial promoveu um maior desenvolvimento das plantas e poderia ser utilizada para o aumento da produtividade agrícola nessa cultura.
Plant growth rhizobacteria might promote an increase of biometric plant and their action can be optimized by availability of carbon and energy, provided via organic fertilization. In this way, the experiment was carried out with aim to evaluate the fertilization effect with cane´s wastes and promoted bacteria inoculation at initial seedling of sugar cane. The experiment was divided at two phases. Phase 1 were utilized Pre-Sprouted-Seedlings (PSS) and the treatments were T1 = control, T2 = Bacillus subtilis, T3 = B. pumilus and T4 = B. subtilis + B. pumilus. The design was randomized blocks with four repetitions. At the final period of PSS formation, were measured the shoot, root and total dry matter and also total bacteria of substrate. At the phase II the factors analysed were four kind of inoculations being T1= no inoculum, T2= B. subtilis, T3= B. pumilus and T4= B. subtilis + B. pumilus with four kind of fertilizations: F1= mineral fertilization (MF), F2= MF + vinasse, F3= MF + filter cake and F4= MF + filter cake compost, combined with 4 x 4 factorial scheme, with four repetitions. The evaluated parameters were: plants biometric data, shoot, root and total dry matter, total bacteria counting, soluble phosphorus, ammonium and nitrate levels into soil. At the PSS phase the use of bacteria promoted the increasing of root and total dry matter. At the phase 2 the treatments which received inoculas had higher height and plant´s diameter and also higher root and total dry matter, with emphasis on B. pumilus, which provided greater. Treatments that serve vineyard associated with mineral fertilization have hampered the development of plants with lower biometric data and lower dry mass of all parts of the plant, while not increasing the size of a number of total bactéria. At the soil analysis, it was observed, that the addition of bacteria promoted a lower nutrients levels into soil and likewise higher plant assimilation. The bacterial inoculation on PSS and on sugar cane at initial development period promoted higher plant development and it could be used to increase of cane yield.
Plant growth rhizobacteria might promote an increase of biometric plant and their action can be optimized by availability of carbon and energy, provided via organic fertilization. In this way, the experiment was carried out with aim to evaluate the fertilization effect with cane´s wastes and promoted bacteria inoculation at initial seedling of sugar cane. The experiment was divided at two phases. Phase 1 were utilized Pre-Sprouted-Seedlings (PSS) and the treatments were T1 = control, T2 = Bacillus subtilis, T3 = B. pumilus and T4 = B. subtilis + B. pumilus. The design was randomized blocks with four repetitions. At the final period of PSS formation, were measured the shoot, root and total dry matter and also total bacteria of substrate. At the phase II the factors analysed were four kind of inoculations being T1= no inoculum, T2= B. subtilis, T3= B. pumilus and T4= B. subtilis + B. pumilus with four kind of fertilizations: F1= mineral fertilization (MF), F2= MF + vinasse, F3= MF + filter cake and F4= MF + filter cake compost, combined with 4 x 4 factorial scheme, with four repetitions. The evaluated parameters were: plants biometric data, shoot, root and total dry matter, total bacteria counting, soluble phosphorus, ammonium and nitrate levels into soil. At the PSS phase the use of bacteria promoted the increasing of root and total dry matter. At the phase 2 the treatments which received inoculas had higher height and plant´s diameter and also higher root and total dry matter, with emphasis on B. pumilus, which provided greater. Treatments that serve vineyard associated with mineral fertilization have hampered the development of plants with lower biometric data and lower dry mass of all parts of the plant, while not increasing the size of a number of total bactéria. At the soil analysis, it was observed, that the addition of bacteria promoted a lower nutrients levels into soil and likewise higher plant assimilation. The bacterial inoculation on PSS and on sugar cane at initial development period promoted higher plant development and it could be used to increase of cane yield.
Descrição
Palavras-chave
Inoculantes bacterianos, Mudas pré-brotadas, Saccharum spp., Torta de filtro, Vinhaça, Bacterial inoculants, Pre-sprouted-seedlings, Filter cake, Vinasse