Modeling adaptation of sorghum in Ethiopia with APSIM—opportunities with G×E×M
| العنوان: | Modeling adaptation of sorghum in Ethiopia with APSIM—opportunities with G×E×M |
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| المؤلفون: | Alemu Tirfessa, Fikadu Getachew, Greg McLean, Erik van Oosterom, David Jordan, Graeme Hammer |
| المصدر: | Agronomy for Sustainable Development. 43 |
| بيانات النشر: | Springer Science and Business Media LLC, 2023. |
| سنة النشر: | 2023 |
| مصطلحات موضوعية: | Environmental Engineering, Agronomy and Crop Science |
| الوصف: | Sorghum is an important food and feed crop in the dry lowland areas of Ethiopia. Farmers grow both early-sown long-duration landraces and late-sown short-duration improved varieties. Because timing and intensity of drought stress can vary in space and time, an understanding of major traits (G), environments (E), management (M), and their interactions (G×E×M) is needed to optimize grain and forage yield given the limited available resources. Crop simulation modeling can provide insights into these complex G×E×M interactions and be used to identify possible avenues for adaptation to prevalent drought patterns in Ethiopia. In a previous study predictive phenology models were developed for a range of Ethiopian germplasm. In this study, the aims were to (1) further parameterize and validate the APSIM-sorghum model for crop growth and yield of Ethiopian germplasm, and (2) quantify by simulation the productivity-risk trade-offs associated with early vs late sowing strategies in the dry lowlands of Ethiopia. Field experiments involving Ethiopian germplasm with contrasting phenology and height were conducted under well-watered (Melkassa) and water-limited (Miesso) conditions and crop development, growth and yield measured. Soil characterization and weather records at the experimental sites, combined with model parameterization, enabled testing of the APSIM-sorghum model, which showed good correspondence between simulated and observed data. The simulated productivity for the Ethiopian dry lowlands environments showed trade-offs between biomass and grain yield for early and late sowing strategies. The late sowing strategy tended to produce less biomass except in poor seasons, whereas it tended to produce greater grain yield except in very good seasons. This study exemplified the systems approach to identifying traits and management options needed to quantify the production-risk trade-offs associated with crop adaptation in the Ethiopian dry lowlands and further exemplifies the general robustness of the sorghum model in APSIM for this task. |
| تدمد: | 1773-0155 1774-0746 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::303e01f351d90487ad471855902ed2c9 https://doi.org/10.1007/s13593-023-00869-w |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi...........303e01f351d90487ad471855902ed2c9 |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 17730155 17740746 |
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