Effect of Recurrent Irrigation with Treated Sewage from Anaerobic Digester Coupled with Anaerobic Baffled Reactor on Soil Fertility
Keywords:Digester, farming cycle, greenhouse, recurrent irrigation, treated sewage
Growing recognition of treated wastewater as a resource is among the factors influencing its reuse in agriculture worldwide. Long-term effect of irrigation with treated wastewater on soil is widely reported; however, the effect of irrigated farming cycles with treated sewage on soil fertility is rarely reported. In this study, greenhouse maize plot experiment, consisting of triplicate plots irrigated with treated sewage and tap water was conducted for three consecutive farming cycles. Soil was sampled for analysis at the depths of 0-20 cm, 20-40 cm and 40-60 cm after every farming cycle. After the third farming cycle, pH and organic matter content increased significantly (P≤0.05) at all depths; NO3-N and PO4-P increased at 0-20 cm, though was not significant (P≥0.05); while EC and TDS decreased at all depths. With exception of pH, soil organic matter content, NO3-N, and PO4-P, were significantly higher (P≤0.05) in plots irrigated with treated sewage for all cycles; while EC and TDS were only significant after the second farming cycle. Variation of soil parameters was not consistent with the irrigated farming cycles. Irrigation with treated sewage improved soil PO4-P and organic matter content but posed soil alkalinity, thus pH amendment is needed after the third farming cycle.
How to Cite
Copyright (c) 2022 International Journal of Environment
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
The author(s) acknowledge that the manuscript submitted is his/her/their own original work; all authors participated in the work in a substantive way and are prepared to take public responsibility for the work; all authors have seen and approved the manuscript as submitted; the manuscript has not been published and is not being submitted or considered for publication elsewhere; the text, illustrations, and any other materials included in the manuscript do not infringe(plagiarism) upon any existing copyright or other rights of anyone.
Notwithstanding the above, the Contributor(s) or, if applicable the Contributor’s Employer, retain(s) all proprietary rights other than copyright, such as Patent rights; to use, free of charge, all parts of this article for the author’s future works in books, lectures, classroom teaching or oral presentations; the right to reproduce the article for their own purposes provided the copies are not offered for sale.
The copyright to the contribution identified is transferred to IJE.