%0 Journal Article
%A Mohammed, Gihan
%A Siebers, Nina
%A Merbach, Ines
%A Seidel, Sabine J.
%A Herbst, Michael
%T Simulation of soil phosphorus dynamics and crop yield for organic and mineral fertilization treatments at two long-term field sites
%J The science of the total environment
%V 957
%@ 0048-9697
%C Amsterdam [u.a.]
%I Elsevier Science
%M FZJ-2024-06327
%P 177517 -
%D 2024
%X The efficacy of phosphorus (P) based fertilizers is frequently compromised by soil dynamics that render much ofthe applied P unavailable for crops. This study aimed to: (i) validate a new P model's prediction of plant-availableP; (ii) analyze the effects of organic versus mineral fertilization on P availability and crop yield; and (iii) examinetemporal changes in P pools under various fertilization regimes. Data were collected from two long-term fieldtrials, Dikopshof and Bad Lauchst¨adt, in Germany, using organic (FYM), mineral (MIN), a combination of organicand mineral (MIX) fertilizers, and unfertilized treatments. The AgroC model, incorporating a new P module,accurately predicted P dynamics in cropped plots. At both sites, MIX presented the highest yield, P removal, totalP and available soil P. After 120 years of repeated P fertilization, simulations at Dikopshof revealed a positive Pbalance in MIN (11.1 % with observed 13 %) and in MIX (15 % with observed 15 %), but negative in FYM (- 4.9% with observed - 5 %). However, at Bad Lauchst¨adt, the P balance was negative in all treatments except in MIN(+1.04 %), indicating P depletion. Among crops, cereals showed the most variated yields, with P-use efficiencyranging from 50 % to 99 %, while sugar beet presented the highest P-use efficiency (up to 122 %). The lowest Papplication rates exhibited, FYM treatment, the highest P-use efficiency for all crops. Model pools were successfullylinked to field-measured soil P fractions using CAL and DGT methods, providing initial predictions ofvarious soil P fractions across different fertilization strategies.
%F PUB:(DE-HGF)16
%9 Journal Article
%R 10.1016/j.scitotenv.2024.177517
%U https://juser.fz-juelich.de/record/1032539