Agronomic performance of common bean crops fertigated with treated sewage and mineral fertilizer

Edcássio D. Araújo,Pablo F. S. Alves,Abner J. de Carvalho,Silvânio R. dos Santos,Marcos K. Kondo,Francielle de M. Feitosa

doi:10.1590/1807-1929/agriambi.v24n8p520-527

Edcássio D. Araújo, Pablo F. S. Alves + Show 4 more

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https://doi.org/10.1590/1807-1929/agriambi.v24n8p520-527

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Abstract

ABSTRACT The water deficit in arid and semiarid regions and the high cost of fertilizers are factors for the study of application of sewage on agricultural crops. Therefore, the objective of this study was to evaluate the effect of application of different doses of treated sewage from the tertiary treatment (TS-3), and mineral fertilizer on the yield and production components of common bean plants. The experiment was conducted in Janaúba, MG, Brazil, using a randomized block design, with four repetitions, in a split-plot scheme, with five treatments in the plots consisting of potassium (K2O) applications at the dose required by common bean plants via clear water + 40 kg ha-1 of K2O mineral (Control), and TS-3 applications supplying 20, 40, 60 and 80 kg ha-1 of K2O, and two cultivars in the subplots, BRS-MG-Madreperola and Ouro Negro. The cultivar Ouro Negro was more responsive than the cultivar BRS-MG-Madreperola to the different TS-3 doses and mineral fertilizer regarding their leaf, stem, and shoot dry weights, and their ratios. However, the highest doses of K2O via TS-3 affected negatively the grain yield in common bean plants. The dose of 20 kg ha-1 of K2O via TS-3 is the best dose for common bean plants.

Highlights

IntroductionConsidering the importance of using TS-3, studying its effect on crops of economic interest is important
The agricultural use of treated sewage from the tertiary treatment (TS-3) is a promising alternative for the use of this type of wastewater, which can decrease pollution of water bodies, make water and nutrients available to plants, and recycle soil nutrients (Jasim et al, 2016).Considering the importance of using TS-3, studying its effect on crops of economic interest is important
Considering the importance of common bean crops in Brazil, where high yields are usually associated with high water and nutrients availability, the objective of this work was to evaluate the effect of application of different doses of treated sewage from the tertiary treatment (TS-3), and soil mineral fertilizer on the yield and production components of common bean plants of the cultivars BRS-MG-Madreperola and Ouro Negro

Summary

Introduction

Considering the importance of using TS-3, studying its effect on crops of economic interest is important. One of these crops is common bean (Phaseolus vulgaris L.), which is the main protein source in developing countries and a crop species with the fourth largest planted area in Brazil (IBGE, 2018). TS-3 is a source of water and nutrients and, when its distribution is well managed, increases vegetative growth and yield of common bean (Saffari & Saffari, 2013), lettuce (Urbano et al, 2017), and sugarcane (Gonçalves et al, 2017) crops. The application of TS-3 based on some irrigation criteria increases soil salinity (Saffari & Saffari, 2013), and common bean crops are sensitive to salt stress. There are varieties that have some tolerance to salt stress that can be identified and grown under TS-3 fertigation

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