Journal article
Mitigate nitrate contamination in potato tubers and increase nitrogen recovery by combining dicyandiamide, moringa oil and zeolite with nitrogen fertilizer
Ecotoxicology and Environmental Safety, Vol.209, Art. 111839
2021
Abstract
Potato is considered a nitrogen (N) intensive plant with a low N use efficiency (NUE). The current study introduced an excellent approach by combining dicyandiamide (DCD), moringa seed oil (MSO), or zeolite (ZE), with N fertilizer for maximizing potato tuber yields and NUE as well as minimizing tubers nitrate (NO3−) accumulation. The impact of these materials on soil N availability and gaseous emissions (NH3, and N2O) was investigated under incubation conditions. A 2-year field experiment were carried out with seven treatments [without N (control), N fertilizer (350 kg N-urea ha−1 as a recommended dose; UreaRD), 75% of N recommended dose with DCD (Urea75%RD+DCD), Urea75%RD with 2% MSO (Urea75%RD+MSO2%), Urea75%RD with 4% MSO (Urea75%RD+MSO4%), Urea75%RD with 0.5 Mg ZE ha−1 (Urea75%RD+ZER1), and Urea75%RD with 1.0 Mg ZE ha−1 (Urea 75%RD+ZER2)]. We also conducted a 40-days incubation trial with the same treatments; however, urea was added at the rate of 200 mg N kg−1 soil for all treatments, excluding the control. The addition of DCD, MSO, and ZE with urea under incubation conditions delayed the nitrification process, thereby causing a rise in NH4+-N content and a decrease in NO3−-N content. Ammonia-oxidizing bacteria (AOB) was inhibited (p ≤ 0.01) in treatments Urea+DCD, Urea+MSO4%, and Urea+ZER2. The highest NUE indexes were recorded in treatment Urea75%RD+DCD. The highest NO3- accumulation (567 mg NO3− kg−1) in potato tubers was recorded in treatment UreaRD. Whilest, the lowest NO3- content (81 mg NO3− kg−1) was in treatment Urea75%RD+DCD. The lowest cumulative N2O emissions and highest cumulative NH3 volatilization were observed in the treatment Urea+DCD under incubation conditions. Our findings demonstrated that N fertilizer rate could be reduced by 25%, while the tuber yields increased with an acceptable limit of NO3− content, resulting in economical, agronomical, and environmental benefits.
Details
- Title
- Mitigate nitrate contamination in potato tubers and increase nitrogen recovery by combining dicyandiamide, moringa oil and zeolite with nitrogen fertilizer
- Authors/Creators
- A.S. Elrys (Author/Creator) - Nanjing Normal UniversityM.F. Abo El-Maati (Author/Creator)E.M.W. Abdel-Hamed (Author/Creator) - Zagazig UniversityS.M.A.I. Arnaout (Author/Creator) - Zagazig UniversityK.A. El-Tarabily (Author/Creator)E.M. Desoky (Author/Creator)
- Publication Details
- Ecotoxicology and Environmental Safety, Vol.209, Art. 111839
- Publisher
- Elsevier Inc.
- Identifiers
- 991005540245807891
- Copyright
- © 2020 The Author(s).
- Murdoch Affiliation
- College of Science, Health, Engineering and Education
- Language
- English
- Resource Type
- Journal article
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Source: InCites
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- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.45 Soil Science
- 3.45.397 Nitrogen Management
- Web Of Science research areas
- Environmental Sciences
- Toxicology
- ESI research areas
- Environment/Ecology