Aims: Phosphorus (P) is an essential nutrient necessary for maintaining crop growth, however, it’s often used inefficiently within agroecosystems, driving industry to find new ways to deliver P to crops sustainably. We aim to combine traditional soil and crop measurements with climate-driven mathematical models, to give insight into optimising the timing and placement of fertiliser applications. Methods: The whole plant crop model combines an above-ground leaf model with an existing spatially explicit below-ground root-soil model to estimate plant P uptake and above ground dry mass. We let P-dependent photosynthesis estimate carbon (C) mass, which in conjunction with temperature sets the root-growth-rate. Results: The addition of the leaf model achieved a better estimate of two sets of barley field trial data for plant P uptake, compared with just the root-soil model alone. Furthermore, discrete fertiliser placement increases plant P uptake by up to 10 % in comparison to incorporating fertiliser. Conclusions: By capturing essential plant processes we are able to accurately simulate P and C use and water and P movement during a cropping season. The powerful combination of mechanistic modelling and experimental data allows physiological processes to be quantified accurately and useful agricultural predictions for site specific locations to be made.
|Original language||English (US)|
|Number of pages||17|
|Journal||PLANT AND SOIL|
|State||Published - Apr 14 2016|
Bibliographical noteKAUST Repository Item: Exported on 2022-06-01
Acknowledged KAUST grant number(s): KUK-C1-13- 04
Acknowledgements: We would like to thank the BBSRC and DEFRA (BB/I024283/1) for funding S.P. and The Royal Society University Research Fellowship for funding T.R. K.C.Z. was partially funded by Award No. KUK-C1-13- 04 of the King Abdullah University of Science and Technology (KAUST); J.H. by EPSRC Postdoctoral Prize Fellowship; and S.P., P.T., D.L., R.S-B., A.C.E, R.W., P.W, D.L.J. and T.R. by DEFRA, BBSRC, Scottish Government, AHDB, and other industry partners through Sustainable Arable LINK Project LK09136.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.
ASJC Scopus subject areas
- Plant Science
- Soil Science