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The effect of fertilizer best management practices on nitrate leaching in a plastic mulched ridge cultivation system

Title data

Ruidisch, Marianne ; Bartsch, Svenja ; Kettering, Janine ; Huwe, Bernd ; Frei, Sven:
The effect of fertilizer best management practices on nitrate leaching in a plastic mulched ridge cultivation system.
In: Agriculture, Ecosystems & Environment. (2013) Issue 169 . - pp. 21-32.
ISSN 0167-8809
DOI: https://doi.org/10.1016/j.agee.2013.02.006

Abstract in another language

Groundwater pollution by fertilizer NO3− is a major problem recognized in many parts of the world. The excessive use of mineral fertilizers to assure high yields in agricultural production intensifies the leaching problem especially in regions affected by a monsoon climate as in South Korea. The extent that leaching occurs depends on several factors such as climatic conditions, agricultural management practices, soil properties and the sorption characteristics of fertilizers and agrochemicals. In the South Korean monsoon season 2010, NO3− concentrations under varying nitrogen fertilizer rates were monitored in a plastic mulched ridge cultivation (RTpm) with radish crops (Raphanus sativus L.). Based on these findings we calibrated a three-dimensional water flow and solute transport model using the numerical code HydroGeoSphere in combination with the parameter estimation software ParallelPEST. Subsequently, we used the calibrated model to investigate the effect of plastic mulch as well as different fertilizer best management practices (FBMPs) on NO3− leaching. We found that cumulative NO3− leaching under RTpm was 26% lower compared to ridge tillage without coverage (RT). Fertilizer placement confined to the ridges resulted in 36% lower cumulative NO3−-leaching rates compared to broadcast applied fertilizer. Splitting the total amount of 150 kg NO3− ha−1 per growing season into three fertilizer applications (1–4–2.5 ratio) led to a reduction of NO3− leaching of 59% compared to the one-top dressing at the beginning of the growing season. However, the combination of a fertilizer rate of 150 kg NO3− ha−1, plastic mulched ridges, fertilizer placement only in the ridges and split applications of fertilizer resulted in the lowest cumulative NO3− leaching rate (8.14 kg ha−1) during the simulation period, which is equivalent to 5.4% of the total NO3− fertilizer input. Compared to RT with conventional one-top dressing fertilization in ridges and furrows, the NO3− leaching was reduced by 82%. Consequently, the combination of all FBMPs is highly recommendable to decrease economical costs for fertilizer inputs as well as to minimize nitrate leaching and its impact on groundwater quality.

Further data

Item Type: Article in a journal
Refereed: No
Additional notes: BAYCEER114093
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Plant Ecology
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Former Professors > Chair Plant Ecology - Univ.-Prof. John D. Tenhunen, Ph.D.
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Hydrology
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Hydrology > Chair Hydrology - Univ.-Prof. Dr. Stefan Peiffer
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Soil Physics
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Former Professors > Professorship Soil Physics - Univ.-Prof. Dr. Bernd Huwe
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Former Professors
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Research Institutions
Research Institutions > Research Centres
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Former Professors
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 12 May 2015 06:11
Last Modified: 11 Jul 2015 19:04
URI: https://eref.uni-bayreuth.de/id/eprint/13349