An intermediate wheatgrass model for APSIM next generation

Vista sencilla de ítem
dc.creatorInnes, P. J.
dc.creatorNewell, M. T.
dc.creatorPembleton, K. G.
dc.creatorHayes, R. C.
dc.creatorRadanielson, A. M.
dc.date2025-09-19
dc.date2025-11-13T02:32:54Z
dc.date2025-11-13T02:32:54Z
dc.date.accessioned2026-06-27T04:14:25Z
dc.descriptionPerennial cereals, for dual purpose grain and forage production, are being considered as an alternative to annual cereals in many grazing and cropping enterprises. Field experiments in NSW Australia and elsewhere have identified candidate species, such as intermediate wheatgrass and mountain rye, which produce both grain and biomass over a two-to-three year period. Existing experimental data pertaining to the phenology and yields of perennial cereals are mostly from higher latitude temperate regions of North America. There are sparse data to inform the likely growth and yields of perennial cereals in warmer latitudes. This study aimed to address this gap using the APSIM Next Generation crop simulation program. A model for one of the candidate perennial cereals, intermediate wheatgrass, was constructed within APSIM. The model was then used to predict the likely phenology, biomass, and grain yields of intermediate wheatgrass in diverse environments under varying management regimes. The model was parameterised using phenology and yield datasets from Australia and North America. Validation of the model, using a different selection of datasets, indicated a strong phenology prediction accuracy (r²=0.96, RMSE=7.94 (Zadoks scale)). Prediction accuracies for above ground biomass and grain yield were acceptable (r²=0.75, RMSE=2372 kg/ha and r²=0.80, RMSE=148 kg/ha respectively). The model responded appropriately to irrigation and fertiliser inputs. Further simulations, using a transect of locations from sub-tropical Queensland to temperate Tasmania, indicated that successful grain production, given the current vernalisation requirements of intermediate wheatgrass, is likely restricted to temperate zones of the current cereal cropping regions in Australia. The Intermediate Wheatgrass model is the only comprehensive perennial grains model available at present. It will be a valuable tool for both plant breeders and farm planners when developing new cultivars and/or defining suitable geographical regions for new perennial grains crops, such as intermediate wheatgrass.
dc.formatapplication/pdf
dc.identifierhttps://hdl.handle.net/10568/177859
dc.identifier.urihttp://hdl.handle.net/123456789/26206
dc.languageen
dc.publisherElsevier
dc.rightsOpen Access
dc.sourceInnes, P. J., M. T. Newell, K. G. Pembleton, R. C. Hayes, and A. M. Radanielson. "An intermediate Wheatgrass model for APSIM next generation." European Journal of Agronomy 172, no. 127858 (2026): 1-12.
dc.subjectperennials
dc.subjectwheatgrass
dc.subjectforage crops
dc.subjectproduction
dc.subjectgrain
dc.subjectyields
dc.subjectphenology
dc.subjectirrigation
dc.subjectfertilizer application
dc.subjectsimulation models
dc.titleAn intermediate wheatgrass model for APSIM next generation
dc.typeJournal Article

Archivos

Colecciones

Instituto Internacional de Investigación del Arroz (IRRI)