Soil attributes and quality under treated domestic sewage irrigation in sugarcane

Revista Brasileira de Engenharia Agricola e Ambiental

Santos, Leonardo N. S. dos¹  Feitosa, Daniel R. C.²  Matsura, Edson E.³  Nazário, Aline A.³  Barbosa, Eduardo A. A.⁴  Gonçalves, Ivo Z.⁵ 

[1] Instituto Federal Goiano, Rio Verde, Brazil;Instituto Federal do Sertão de Pernambucano, Floresta, Brazil;Universidade Estadual de Campinas, Campinas, Brazil;Universidade Estadual de Ponta Grossa, Ponta Grossa, Brazil;University of Nebraska, Lincoln, United States of America

关键词: soil functions;    water reuse;    subsurface drip;    fertigation;    soil acidification.;   

DOI  :  10.1590/1807-1929/agriambi.v22n2p137-142

学科分类：农业科学（综合）

来源: Universidade Federal de Campina Grande * Centro de Ciencias e Tecnologia

【 摘 要 】

Using domestic sewage to irrigate and supply nutrients to plants is a sustainable practice; however, due to the physical and chemical properties of the domestic sewage, soil attributes and quality may be changed with its application. The aim of this study was to evaluate soil quality after two cycles of sugarcane irrigated with treated domestic sewage and surface reservoir water via subsurface drip irrigation, with and without nutritional supplementation by fertigation, and a non-irrigated control with top-dressing fertilization. Soil quality was established by applying the methodology proposed by Karlen & Stott. Physical, chemical and microbiological indicators were selected to compose the basic soil functions used to determine the quality index. Application of treated domestic sewage with fertigation increased soil electrical conductivity, Na+ content and exchangeable sodium percentage. Reservoir water applications with fertigation increased microbial biomass carbon and reduced the metabolic quotient, besides promoting significant effects on soil acidification indicators in comparison to reservoir water irrigation without fertigation. Despite the alteration of some soil attributes, no significant changes in the soil quality index were observed among the treatments.

【 授权许可】

CC BY