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Nutrient runoff and leaching under various fertilizer treatments and pedogeographic conditions: A case study in tobacco (Nicotiana tabacum L.) fields of the Erhai Lake basin, China.
- Source :
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European Journal of Agronomy . May2024, Vol. 156, pN.PAG-N.PAG. 1p. - Publication Year :
- 2024
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Abstract
- To ensure water security, it is crucial to understand the characteristics of nitrogen (N) and phosphorus (P) in water and to reduce their inputs. We conducted a 2-year trial (2021–2022) in tobacco fields across three sites in the Erhai Lake basin, China, to comprehensively measure and summarize N and P loss through runoff and leaching for four fertilizer treatments: no fertilizer (CK); farmers' traditional organic fertilizer (FP); chemical fertilizer (CF); and a combination of organic and inorganic fertilizer (OIC). The highest N concentrations were detected in leachate in the early tobacco growth stage, whereas the highest P concentrations occurred in runoff in the middle growth stage. Compared to FP, the OIC treatment improved nutrient uptake in flue-cured tobacco, while also reducing N loss through runoff and leaching by 45.37% and 19.34%, and reducing P loss by 7.22% and 8.26%, respectively. Correlation analyses revealed positive relationships of nutrient loss with soil organic matter content and nutrient inputs; elevation and soil water content exhibited varying correlations with different nutrients. These findings provide a theoretical foundation for the effective management of agricultural non-point source pollution in the Erhai Lake basin and shed light on water pollution pressures worldwide. [Display omitted] • The characteristics of nutrient loss under different fertilization treatments and geographical conditions were explored. • The combination of organic and inorganic fertilizer increased the yield of tobacco field and reduced the nutrient loss. • Nitrogen and Phosphorus were mainly lost in the form of nitrate N and dissolved P. • Soil organic matter content and nutrient input had a positive effect on nutrient loss. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 11610301
- Volume :
- 156
- Database :
- Academic Search Index
- Journal :
- European Journal of Agronomy
- Publication Type :
- Academic Journal
- Accession number :
- 176587863
- Full Text :
- https://doi.org/10.1016/j.eja.2024.127170