The early flowering of deficit irrigation treatments could not be simulated

[weidanaa]

Dear expert: We are currently trying to use the APSIM model to accurately simulate crop phenology under different irrigation treatments. The trial results show that the winter wheat phenology is shortened under water deficit, but it is not captured in the APSIM simulation.

We modified the relevant parameters before. By changing " 0.2 0.50 1.0， <y_swdefpheno The "flowering description" was modified to <1, where water limitation existed, but the result was a synchronous delay in the phenology of the different irrigation treatments.

We would like to simulate the actual situation in the field "Early flowering of winter wheat due to deficit irrigation", how should we modify it?

Sincerely

[peter-devoil]

From what I can tell by searching the code, that parameter isnt used anywhere. That isnt unusual; it could be that some exploratory work (since deleted/never committed) used it once. The best resource we have for pulling apart the wheat model is Bangyou's pdf.

You could try modifying y_swdef_pheno (ie affects the whole lifetime of the crop); but really it's easier to do this experiment in nextgen where the model structure is more exposed and configurable.