Publication date: 15 November 2017
Source:Geoderma, Volume 306
Author(s): Åsgeir Rossebø Almås, Hilmar Thor Sævarsson, Tore Krogstad
Phosphorus (P) is an increasingly limited resource for food production, which necessitates studying soil factors controlling rates of P release to soil solution. Phosphorus use efficiency is among other, affected by the plants, the plant root induced displacement of P equilibrium in soil during uptake and the following rates of replenishment from geochemically active P stores in soil. Here, soil P partitioning and flux data collected from a 50K d concealed accumulated P labile stores, whereas K d estimations from ammonium lactate (AL) extractions did not. The estimated fluxes in the latter situation stabilized after 24K d approaches showed the importance of considering inherent P-stores for calculating fluxes and deliveries of labile P available for plants during P-uptake. The use of DGT and DIFS in combination enabled good estimations of fluxes. Such fluxes may be used to estimate, In Situ, critical soil solution P concentrations available for plants during growth, in different soil types.
![image]()
Source:Geoderma, Volume 306
Author(s): Åsgeir Rossebø Almås, Hilmar Thor Sævarsson, Tore Krogstad
Graphical abstract
