Ecosystem C and N dynamics affected by a modified spring barley trait with increased nitrogen use - a simulation case study
To what extent might a crop with increased plant N uptake efficiency and/or N demand increase plant biomass and soil carbon storage, decrease N leaching, and reduce the need for N fertilisation? This was assessed for a fertilised sandy loam site in central Sweden cultivated with spring barley for a...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2018-04-01
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| Series: | Acta Agriculturae Scandinavica. Section B, Soil and Plant Science |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/09064710.2017.1385835 |
| _version_ | 1797684406888955904 |
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| author | Henrik Eckersten Håkan Marstorp Dennis Collentine Holger Johnsson Thomas Kätterer |
| author_facet | Henrik Eckersten Håkan Marstorp Dennis Collentine Holger Johnsson Thomas Kätterer |
| author_sort | Henrik Eckersten |
| collection | DOAJ |
| description | To what extent might a crop with increased plant N uptake efficiency and/or N demand increase plant biomass and soil carbon storage, decrease N leaching, and reduce the need for N fertilisation? This was assessed for a fertilised sandy loam site in central Sweden cultivated with spring barley for a four year period using a process based crop and soil simulation model (SOILN) calibrated to fit observations of field experiments with non-modified crops. Crop properties were changed in accordance with previous model applications to other crops with higher N uptake and utilisation efficiencies, to resemble potential effects of breeding. For the modified crops a doubling of daily uptake efficiency of soil mineral N and/or increase of radiation use efficiency by 30%, increased plant biomass by 3%–30%, decreased N leaching by 1%–30% and increased soil organic carbon (SOC) content by 1–12 g C m−2 year−1. The larger changes were mainly due to increased uptake efficiency. Fertilisation of the modified spring barley crop could be reduced while still producing the same plant biomass as the non-modified crop. The plant biomass to N leaching ratio of the modified crops increased. The simulated changes in plant biomass and SOC were sensitive to weather conditions suggesting that in situ experiments would need to cover a large range of weather conditions to evaluate the performance of new crop traits under climatic variability. The study suggests a strong need that field experiments are accompanied with model applications, when exploring the potential of the modified crops under variable conditions. |
| first_indexed | 2024-03-12T00:29:11Z |
| format | Article |
| id | doaj.art-6afe7cac0f1b4b8f92314bae3ff4385f |
| institution | Directory Open Access Journal |
| issn | 0906-4710 1651-1913 |
| language | English |
| last_indexed | 2024-03-12T00:29:11Z |
| publishDate | 2018-04-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Acta Agriculturae Scandinavica. Section B, Soil and Plant Science |
| spelling | doaj.art-6afe7cac0f1b4b8f92314bae3ff4385f2023-09-15T10:21:32ZengTaylor & Francis GroupActa Agriculturae Scandinavica. Section B, Soil and Plant Science0906-47101651-19132018-04-0168323024210.1080/09064710.2017.13858351385835Ecosystem C and N dynamics affected by a modified spring barley trait with increased nitrogen use - a simulation case studyHenrik Eckersten0Håkan Marstorp1Dennis Collentine2Holger Johnsson3Thomas Kätterer4Swedish University of Agricultural SciencesSwedish University of Agricultural SciencesSwedish University of Agricultural SciencesSwedish University of Agricultural SciencesSwedish University of Agricultural SciencesTo what extent might a crop with increased plant N uptake efficiency and/or N demand increase plant biomass and soil carbon storage, decrease N leaching, and reduce the need for N fertilisation? This was assessed for a fertilised sandy loam site in central Sweden cultivated with spring barley for a four year period using a process based crop and soil simulation model (SOILN) calibrated to fit observations of field experiments with non-modified crops. Crop properties were changed in accordance with previous model applications to other crops with higher N uptake and utilisation efficiencies, to resemble potential effects of breeding. For the modified crops a doubling of daily uptake efficiency of soil mineral N and/or increase of radiation use efficiency by 30%, increased plant biomass by 3%–30%, decreased N leaching by 1%–30% and increased soil organic carbon (SOC) content by 1–12 g C m−2 year−1. The larger changes were mainly due to increased uptake efficiency. Fertilisation of the modified spring barley crop could be reduced while still producing the same plant biomass as the non-modified crop. The plant biomass to N leaching ratio of the modified crops increased. The simulated changes in plant biomass and SOC were sensitive to weather conditions suggesting that in situ experiments would need to cover a large range of weather conditions to evaluate the performance of new crop traits under climatic variability. The study suggests a strong need that field experiments are accompanied with model applications, when exploring the potential of the modified crops under variable conditions.http://dx.doi.org/10.1080/09064710.2017.1385835plant breedingn uptaken utilisationn leachingsocsandy loamsweden |
| spellingShingle | Henrik Eckersten Håkan Marstorp Dennis Collentine Holger Johnsson Thomas Kätterer Ecosystem C and N dynamics affected by a modified spring barley trait with increased nitrogen use - a simulation case study Acta Agriculturae Scandinavica. Section B, Soil and Plant Science plant breeding n uptake n utilisation n leaching soc sandy loam sweden |
| title | Ecosystem C and N dynamics affected by a modified spring barley trait with increased nitrogen use - a simulation case study |
| title_full | Ecosystem C and N dynamics affected by a modified spring barley trait with increased nitrogen use - a simulation case study |
| title_fullStr | Ecosystem C and N dynamics affected by a modified spring barley trait with increased nitrogen use - a simulation case study |
| title_full_unstemmed | Ecosystem C and N dynamics affected by a modified spring barley trait with increased nitrogen use - a simulation case study |
| title_short | Ecosystem C and N dynamics affected by a modified spring barley trait with increased nitrogen use - a simulation case study |
| title_sort | ecosystem c and n dynamics affected by a modified spring barley trait with increased nitrogen use a simulation case study |
| topic | plant breeding n uptake n utilisation n leaching soc sandy loam sweden |
| url | http://dx.doi.org/10.1080/09064710.2017.1385835 |
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