Inoculation with Trichoderma harzianum and Azospirillum brasilense increases nutrition and yield of hydroponic lettuce
Data
2022
Autores
Moreira, Vitoria de Almeida
Oliveira, Carlos Eduardo da Silva [UNESP]
Jalal, Arshad
Gato, sabela Martins Bueno
Oliveira, Thaissa Julyanne Soares Sena
Boleta, Guilherme Henrique Marcandalli
Giolo, Victoria Moraes
Vitória, Letícia Schenaide
Tamburi, Karen Vicentini
Teixeira Filho, Marcelo Carvalho Minhoto [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Springer
Resumo
The use of beneficial fungi and bacteria stimulate plant growth and serve to improve yield and food quality in a sustainable manner. The electrical conductivity of nutrients solution is closely linked to better nutrition of vegetable plants in a hydroponic system. Therefore, objectives of current study were to evaluate the effect of isolated and combined inoculation with Azospirillum brasilense and Trichoderma harzianum under two electrical conductivities on growth, nutrition, and yield of lettuce in hydroponic cultivation. The experiment was designed in a strip-plot block with five replications in a 4× 2 factorial scheme. The treatments were consisted of four microbial inoculations (without, A. brasilense, T. harzianum and co-inoculation) and electrical conductivities (1.2 and 1.4 dS m−1). Inoculation with A. brasilense and T. harzianum increased lettuce root growth by 47% and 20%, respectively. The single inoculation of T. harzianum provided higher fresh leaves yield (24%) at electrical conductivity of 1.2 dS m−1, while single inoculation with A. brasilense increased fresh leaves yield by 17% at electrical conductivity 1.4 dS m−1. The lowest shoot NO3− accumulation (40%) was observed with inoculation of A. brasilense and highest (28%) with inoculation T. harzianum in both electrical conductivities. Inoculation with A. brasilense increased leaf accumulation of K, P, Ca, Mg, Fe, Mn, Cu, and Zn, which are essential for human nutrition and being recommended to improve yield of lettuce plants in hydroponics. It is recommended to use EC 1.4 dS m−1 of the nutrients solution to improve accumulation of K, Mn, Cu, and Zn, regardless of inoculations for biofortification of lettuce with application of fertilizers.
Descrição
Palavras-chave
Plant growth-promoting bacteria, Plant growth-promoting fungi, Co-inoculation, Leaf nitrate, Food biofortification