The rhizosphere is the region of influence of the roots of the plants in the soil that provide environment favorable to the maximum microbial activity. As the maximum microbial activity occurs in the rhizosphere, several benefits are added to this environment, since it becomes a source of biodiversity of microorganisms capable of maintaining the ecological balance, and also provide significant improvements for plants the soil and for the environment. The objective of this work was to evaluate the influence of xenobiotics (fungicides and insecticides) in an isolated and combined way on the microbial diversity benefices of the rhizosphere under the cultivation of 4 unconventional food plants (UFP's) or exotic vegetables. This work was performed with a randomized complete block design in the 4 x 4 factorial scheme, the first factor being the cultures: Fragaria vesca L. (“morango”), Rumex acetosa L. (“azedinha”), Tropaeolum majus L. (capuchin - “capuchinha”) and Stachys Lanata L. (“peixinho”) and the second factor (application with insecticide, application with fungicide, insecticide / fungicide application and control) with 4 replicates. There was no statistical difference between the cultures in relation to the numbers of fungal and soil CFUs and that the application of xenobiotics (fungicides and insecticides, isolated and combined) did not affect the microbial diversity in the soil cultivated with the crops. The xenobiotics did not affect the microbial diversity present in the soils of the tested cultures, being similar statistically with the control. UFP's crops did not present statistical differences regarding CFU in cultivated soils.
A Cana-de-açúcar (Saccharum spp.) é uma cultura de grande importância no cenário brasileiro, o seu manejo influencia diretamente nos atributos do solo, independente do sistema de cultivo, seja ele convencional ou orgânico. O sistema, bem como o cultivo podem alterar as frações de carbono no solo, que pode ser avaliada e monitorada através do acumulo de carbono ou de suas frações contidas na matéria orgânica, uma vez que diversas funções e processos físicos, químicos e biológicos que acontecem no solo têm relação direta com a matéria orgânica. Objetivou-se com este trabalho verificar os teores do carbono orgânico total (COT), das frações oxidáveis e do carbono da biomassa microbiana presentes nos solos manejados com diferentes sistemas de cultivo em Goianésia. Avaliou-se os sistemas convencional e orgânico, com e sem aplicação de vinhaça em três idades de corte (2º, 4º e 6º cortes). O manejo do cultivo de cana-de-açúcar em sistema orgânico contribui para o incremento dos teores de carbono orgânico total do solo e o carbono da biomassa microbiana. O uso de vinhaça é uma prática que incrementa carbono orgânico nos solos sob cultivo de cana-de-açúcar. A idade de corte não apresenta relação linear nos teores de carbono total e das frações analisadas
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