Soil nitrogen and water management by winter-killed catch crops

Show simple item record

dc.identifier.uri Gentsch, Norman Heuermann, Diana Boy, Jens Schierding, Steffen von Wirén, Nicolaus Schweneker, Dörte Feuerstein, Ulf Kümmerer, Robin Bauer, Bernhard Guggenberger, Georg 2022-07-12T08:07:22Z 2022-07-12T08:07:22Z 2022
dc.identifier.citation Gentsch, N.; Heuermann, D.; Boy, J.; Schierding, S.; von Wirén, N. et al.: Soil nitrogen and water management by winter-killed catch crops. In: Soil : an interactive open access journal of the European Geosciences Union 8 (2022), Nr. 1, S. 269-281. DOI:
dc.description.abstract Improving N cycling in agroecosystems is one of the key challenges in reducing the environmental footprint of agriculture. Further, uncertainty in precipitation makes crop water management relevant in regions where it has not been necessary thus far. Here, we focus on the potential of winter-killed catch crops (CCs) to reduce N leaching losses from N mineralization over the winter and from soil water management. We compared four single CCs (white mustard, phacelia, Egyptian clover and bristle oat) and two CC mixtures with 4 and 12 plant species (Mix4 and Mix12) with a fallow treatment. High-resolution soil mineral N (Nmin) monitoring in combination with the modelling of spatiotemporal dynamics served to assess N cycling under winter-killed CCs, while soil water was continuously monitored in the rooting zone. Catch crops depleted the residual Nmin pools by between 40 % and 72 % compared to the fallow. The amount of residual N uptake was lowest for clover and not significantly different among the other CCs. Catch crops that produce high N litter materials, such as clover and mustard leaves, showed an early N mineralization flush immediately after their termination and the highest leaching losses from litter mineralization over the winter. Except for clover, all CCs showed Nmin values between 18 % and 92 % higher on the sowing date of the following maize crop. However, only Mix12 was statistically significant. Catch crops depleted the soil water storage in the rooting zone during their growth in autumn and early winter, but preserved water later on when their residues covered the ground. The shallow incorporation of CC residues increased water storage capacity during the cropping season of the main crop even under reduced soil water availability. Hence, catch cropping is not just a simple plant cover for the winter but improves the growth conditions for the following crop with decreased N losses. Mixtures have been shown to compensate for the weaknesses of individual CC species in terms of nutrient capture, mineralization and transfer to the following main crop as well as for soil water management. Detailed knowledge about plant performance during growth and litter mineralization patterns is necessary to make optimal use of their potential. eng
dc.language.iso eng
dc.publisher Göttingen : Copernicus Publ.
dc.relation.ispartofseries Soil : an interactive open access journal of the European Geosciences Union 8 (2022), Nr. 1
dc.rights CC BY 4.0 Unported
dc.subject catch crop eng
dc.subject growth eng
dc.subject nitrogen cycle eng
dc.subject soil nitrogen eng
dc.subject spatiotemporal analysis eng
dc.subject.ddc 550 | Geowissenschaften ger
dc.title Soil nitrogen and water management by winter-killed catch crops
dc.type Article
dc.type Text
dc.relation.essn 2199-398X
dc.bibliographicCitation.issue 1
dc.bibliographicCitation.volume 8
dc.bibliographicCitation.firstPage 269
dc.bibliographicCitation.lastPage 281
dc.description.version publishedVersion
tib.accessRights frei zug�nglich

Files in this item

This item appears in the following Collection(s):

Show simple item record


Search the repository


My Account

Usage Statistics