RESUMO Estabelecer os efeitos da aplicação de águas residuárias nos atributos químicos do solo permite o reúso agrícola seguro desses efluentes. Objetivou-se avaliar as alterações nos atributos químicos de um Latossolo no semiárido, cultivado com banana 'Prata-Anã' fertirrigada com diferentes doses de água residuária sanitária após tratamento terciário (ART) da Estação de Tratamento de Esgoto de Janaúba - MG. O experimento foi conduzido no delineamento em blocos completos casualizados. As doses de ART avaliadas foram equivalentes a 70, 130, 170 e 200% do limite de 150 kg ha-1 ano-1 de Na aportado ao solo, sendo também conduzido uma testemunha, sem ART. Ao final do primeiro ciclo de cultivo, foram coletadas amostras de solo nas profundidades de 0-0,2, 0,2-0,4, 0,4-0,6 e 0,6-0,8 m, determinando-se alguns atributos químicos. O uso de ART aumenta o pH do solo e reduz o teor de Al trocável, contribuindo para a substituição parcial do uso de corretivos de acidez. No entanto, com o aumento no teor de Na mais rápido que a CE do solo ao final do primeiro ciclo de produção da bananeira 'Prata-anã', há tendência de alterações nas propriedades físicas do solo em longo prazo, com a utilização da ART. No curto prazo, o uso de ART não influencia os teores de MOS, P, Ca, Mg, H+Al, V e os micronutrientes no solo. As modificações nos atributos químicos do solo ao final do primeiro ciclo de produção da bananeira não se apresentam restritivas para o cultivo. | ABSTRACT Determining the effects of using wastewater as fertilizer on soil chemical properties allows a safe reuse of this effluent in agriculture. This study evaluated the effects of fertigation with tertiary treated wastewater (TTW) from the Janaúba sewage treatment plant on chemical properties of a Latosol (Oxisol) with banana crops of the Prata-Anã cultivar in the semiarid region of Brazil. A randomized complete block design with four replications was used to test four TTW rates (70%, 130%, 170%, and 200% of the limit of 150 kg ha-1 year-1 of Na that can be applied to the soil) and compare them to a control without TTW. Soil samples from the 0.0-0.2, 0.2-0.4, 0.4-0.6, and 0.6-0.8 m layers were collected at the end of the first crop cycle to evaluate soil chemical properties-pH, soil organic matter (SOM), P, K, Na, Ca, Mg, Al, potential acidity (H+Al), base saturation, B, Cu, Fe, Mn, Zn, remaining P, and electrical conductivity (EC). The use of TTW increases soil pH and decreases exchangeable Al content, thus, reduces the need for liming. However, Na contents increased faster than EC in the soil, indicating that the use of TTW tends to alter soil physical properties over time. The use of TTW had no effect on the soil OM, P, Ca, Mg, and micronutrients contents, potential acidity, and base saturation. The changes in soil chemical attributes observed at the end of the first crop cycle were not limiting to the banana crop.

Determining the effects of using wastewater as fertilizer on soil chemical properties allows a safe reuse of this effluent in agriculture. This study evaluated the effects of fertigation with tertiary treated wastewater (TTW) from the Janaúba sewage treatment plant on chemical properties of a Latosol (Oxisol) with banana crops of the Prata-Anã cultivar in the semiarid region of Brazil. A randomized complete block design with four replications was used to test four TTW rates (70%, 130%, 170%, and 200% of the limit of 150 kg ha-1 year-1 of Na that can be applied to the soil) and compare them to a control without TTW. Soil samples from the 0.0-0.2, 0.2-0.4, 0.4-0.6, and 0.6-0.8 m layers were collected at the end of the first crop cycle to evaluate soil chemical properties-pH, soil organic matter (SOM), P, K, Na, Ca, Mg, Al, potential acidity (H+Al), base saturation, B, Cu, Fe, Mn, Zn, remaining P, and electrical conductivity (EC). The use of TTW increases soil pH and decreases exchangeable Al content, thus, reduces the need for liming. However, Na contents increased faster than EC in the soil, indicating that the use of TTW tends to alter soil physical properties over time. The use of TTW had no effect on the soil OM, P, Ca, Mg, and micronutrients contents, potential acidity, and base saturation. The changes in soil chemical attributes observed at the end of the first crop cycle were not limiting to the banana crop.