Abstract
The use of treated sewage effluents for agricultural irrigation represents a promising agronomic-environmental-economic practice; however, little is known about its effects on chemical attributes of tropical soils. This research project aimed at evaluating the effects of irrigation with secondary-treated sewage effluent (STSE) and various application rates of mineral-N fertilizer (MNF) on total carbon (TC) and nitrogen (TN) contents, and ammonium (NH4 +-N) and nitrate (NO3 --N) concentrations in a tropical soil-pasture system. The experimental field was cropped with Tifton 85 bermudagrass, over two years. The treatments were: T1 (control), irrigation with potable water and addition of MNF, 520 kg ha-1 year-1; T2-T5, irrigation with STSE (31.9 mg L-1 of total-N) and addition of MNF: 0, 171.6, 343.2, and 520 kg ha-1 year-1, respectively. Soil TC and TN concentrations normally decreased over the experimental period. In general, higher NO3 --N concentrations in the soil solution were found for treatments rece...
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
