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Open AccessArticle

Do Soil Warming and Changes in Precipitation Patterns Affect Seed Yield and Seed Quality of Field-Grown Winter Oilseed Rape?

1
Institute of Landscape and Plant Ecology, University of Hohenheim, Ökologiezentrum 2, August-von-Hartmann Str. 3, D-70599 Stuttgart, Germany
2
Institute of Agricultural Sciences in the Tropics, University of Hohenheim, Fruwirthstr. 31, D-70599 Stuttgart, Germany
3
Competitiveness and System Evaluation, Agroscope, Tänikon 1, CH-8356 Ettenhausen, Switzerland
4
Institute of Soil Science and Land Evaluation, University of Hohenheim, Emil-Wolff-Str. 27, D-70599 Stuttgart, Germany
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Institute for Ecological Chemistry, Julius Kühn-Institute, Königin-Luise-Str. 19, D-14195 Berlin, Germany
6
Institute of Crop Science, University of Hohenheim, Fruwirthstr. 23, D-70599 Stuttgart, Germany
*
Author to whom correspondence should be addressed.
Agronomy 2020, 10(4), 520; https://doi.org/10.3390/agronomy10040520
Received: 16 March 2020 / Accepted: 2 April 2020 / Published: 6 April 2020
Increasing air and soil temperatures and changes in precipitation patterns as consequences of climate change will affect crop production in agricultural ecosystems. The combined effects of soil warming and altered precipitation on the productivity and product quality of oil crops are not yet well studied. Winter oilseed rape (OSR) (Brassica napus L., cv. Mercedes) was field-grown under elevated soil temperature (+2.5 °C), reduced precipitation amount (−25%), reduced precipitation frequency (−50%) both separately and in combination in order to investigate effects on crop development, seed yield, and seed quality. Soil warming accelerated crop development during early plant growth and during spring. At maturity, however, plants in all treatments were similar in quantitative (aboveground biomass, seed yield) and qualitative (protein and oil content, amino acids, fatty acids) parameters. We observed the long-term effects of the precipitation manipulation on leaf size, leaf senescence and biomass allocation. Seed yield was not affected by the altered climatic factors, perhaps due to adaptation of soil microorganisms to permanent soil warming and to relatively wet conditions during the seed-filling period. Overall, OSR performed well under moderate changes in soil temperature and precipitation patterns; thus, we observed stable seed yield without negative impacts on nutritive seed quality. View Full-Text
Keywords: climate change; altered precipitation patterns; soil warming; seed yield; seed quality; oilseed rape climate change; altered precipitation patterns; soil warming; seed yield; seed quality; oilseed rape
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Drebenstedt, I.; Hart, L.; Poll, C.; Marhan, S.; Kandeler, E.; Böttcher, C.; Meiners, T.; Hartung, J.; Högy, P. Do Soil Warming and Changes in Precipitation Patterns Affect Seed Yield and Seed Quality of Field-Grown Winter Oilseed Rape? Agronomy 2020, 10, 520.

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