TY - JOUR
T1 - Improving Sustainable Field-Grown Wheat Production With Azospirillum brasilense Under Tropical Conditions
T2 - A Potential Tool for Improving Nitrogen Management
AU - Galindo, Fernando Shintate
AU - Pagliari, Paulo Humberto
AU - Fernandes, Guilherme Carlos
AU - Rodrigues, Willian Lima
AU - Boleta, Eduardo Henrique Marcandalli
AU - Jalal, Arshad
AU - Céu, Elaine Garcia Oliveira
AU - Lima, Bruno Horschut de
AU - Lavres, José
AU - Teixeira Filho, Marcelo Carvalho Minhoto
N1 - Publisher Copyright:
Copyright © 2022 Galindo, Pagliari, Fernandes, Rodrigues, Boleta, Jalal, Céu, Lima, Lavres and Teixeira Filho.
PY - 2022/2/17
Y1 - 2022/2/17
N2 - Sustainable intensification of cropping systems requires to increase productivity and nutrients use efficiency while reducing negative impacts of agricultural management practices on ecosystem and environment. Plant growth-promoting rhizobacteria (PGPR) inoculations are considered one of the most promising and safe strategy to alleviate environmental alterations in context of climatic extremes to improve plant nutrition while reducing dependency of nitrogen (N) fertilizer application. This study investigated the interactive effects of N levels and inoculation with A. brasilense on plant biomass, grain yield, agronomic efficiency (AE) of applied N, apparent N-fertilizer recovery (AFR) and N content in plant targeting economic feasibility of wheat production system. The field trial tested 4 N application levels applied in side-dressing (control, low, average and high; named 0, 50, 100 and 200 kg N ha−1) and two inoculations (without and with A. brasilense seed inoculation). The results exhibited that inoculation with A. brasilense enhanced AE, AFR and N uptake in wheat plants with increased root and shoot N accumulation and grain N accumulation under average and high N application levels. In addition, inoculation increased root and shoot biomass, leading to a yield increase of 10.3% compared with non-inoculated plants. Wheat plant inoculation associated with application of the average N level provided the greatest profitability. Furthermore, results showed that reducing N fertilization from 100 to 50 kg N ha−1 along A. brasilense inoculation led to an increase in operating profit of 10.5%. In view of low economic cost, ease of application, and high probability of a positive response by wheat crops, even associated with different N application levels, the inoculation with A. brasilense prone to be a key sustainable management practice to improve wheat production under tropical conditions. This practice has the potential to increase wheat grain yield, N use and uptake, and overall farm profitability.
AB - Sustainable intensification of cropping systems requires to increase productivity and nutrients use efficiency while reducing negative impacts of agricultural management practices on ecosystem and environment. Plant growth-promoting rhizobacteria (PGPR) inoculations are considered one of the most promising and safe strategy to alleviate environmental alterations in context of climatic extremes to improve plant nutrition while reducing dependency of nitrogen (N) fertilizer application. This study investigated the interactive effects of N levels and inoculation with A. brasilense on plant biomass, grain yield, agronomic efficiency (AE) of applied N, apparent N-fertilizer recovery (AFR) and N content in plant targeting economic feasibility of wheat production system. The field trial tested 4 N application levels applied in side-dressing (control, low, average and high; named 0, 50, 100 and 200 kg N ha−1) and two inoculations (without and with A. brasilense seed inoculation). The results exhibited that inoculation with A. brasilense enhanced AE, AFR and N uptake in wheat plants with increased root and shoot N accumulation and grain N accumulation under average and high N application levels. In addition, inoculation increased root and shoot biomass, leading to a yield increase of 10.3% compared with non-inoculated plants. Wheat plant inoculation associated with application of the average N level provided the greatest profitability. Furthermore, results showed that reducing N fertilization from 100 to 50 kg N ha−1 along A. brasilense inoculation led to an increase in operating profit of 10.5%. In view of low economic cost, ease of application, and high probability of a positive response by wheat crops, even associated with different N application levels, the inoculation with A. brasilense prone to be a key sustainable management practice to improve wheat production under tropical conditions. This practice has the potential to increase wheat grain yield, N use and uptake, and overall farm profitability.
KW - Triticum aestivum
KW - improved nitrogen management
KW - plant growth promoting rhizobacteria
KW - sustainable crop production
KW - tropical agriculture
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UR - http://www.scopus.com/inward/citedby.url?scp=85125751319&partnerID=8YFLogxK
U2 - 10.3389/fenvs.2022.821628
DO - 10.3389/fenvs.2022.821628
M3 - Article
AN - SCOPUS:85125751319
SN - 2296-665X
VL - 10
JO - Frontiers in Environmental Science
JF - Frontiers in Environmental Science
M1 - 821628
ER -