Towards integrated cover crop management: N, P and S release from aboveground and belowground residues

Ecological intensification is crucial for arable organic farmers, in order to partly close the yield gap conventional yields. One strategy this improved management of cover crops, increase availability both nitrogen (N), phosphorus (P) and sulfur (S) subsequent main crop. However, potential crops take up release nutrients has primarily been determined aboveground biomass mostly N. There have fewer studies on belowground biomass, these focused recoverable roots. Thus, unrecoverable residues from rhizodeposits nodules, overlooked. The aim incubation study was therefore assess N, P S intact soil with different crop species at low temperature. Shoots roots seven were incubated 80 days a temperature 5 °C. A comparison revealed wide variation nutrient uptake, chemical composition S, that also varied between shoot Release N shoots showed marked non-stoichiometric behavior, contrast correlated well C:P C:S ratios. (from Vicia villosa) especially mobilization legumes) much greater than amounts This shows pools such as fine contributed release. Garden sorrel (Rumex acetosa) promising regarding uptake P, but multifunctional supplying K, Mg. Hairy vetch (Vicia oilseed radish (Raphanus sativus) white lupin (Lupinus albus) Mn supply. Based our results, we propose use mixtures having supply more complete suite