Crop Residue Management Strategies to Reduce Nitrogen Losses during the Winter Leaching Period after Autumn Spinach Harvest

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dc.creatorFrerichs, Christian-
dc.creatorGlied-Olsen, Stephan-
dc.creatorDe Neve, Stefaan-
dc.creatorBroll, Gabriele-
dc.creatorDaum, Diemo-
dc.identifier.citationAgronomy, 12, 653, MDPI, 2022,1-20ger
dc.description.abstractIn open-field vegetable production, high quantities of soil mineral nitrogen (Nmin) and N-rich crop residues often remain in the field at harvest. After the harvest of crops in autumn, this N can lead to considerable nitrate (NO3-) losses during the subsequent winter leaching period. In four field trials, different tillage depths (3–4, 10, 30 cm) and dates (early autumn, late autumn, early spring) were investigated to reduce N losses after growing spinach in the autumn. In a further treatment, the nitrification inhibitor 3,4-Dimethylpyrazole phosphate (DMPP) was directly applied to the crop residues. Potential N losses were calculated by a balance sheet approach based on Nmin concentration (0–90 cm), measured N mineralization and N uptake by catch crops. By postponing the tillage date from early to late autumn or spring, resprouting spinach stubbles acted as a catch crop, reducing N losses by up to 61 kg ha-1. However, if the spinach biomass collapsed, the N losses increased by up to 33 kg ha-1 even without tillage. The application of DMPP as well as the tillage depth were less effective. Overall, postponing tillage to spring seems to be the most promising approach for reducing N losses during the off-season.eng
dc.rightsAttribution 3.0 Germany*
dc.subjectSpinacia oleracea L.eng
dc.subjectNmin residueeng
dc.subjectBalance sheeteng
dc.subjectNitrate leachingeng
dc.subjectTillage deptheng
dc.subjectTillage dateeng
dc.subjectNitrification inhibitoreng
dc.subject3,4-Dimethylpyrazole phosphateeng
dc.subject.ddc580 - Pflanzen (Botanik)ger
dc.titleCrop Residue Management Strategies to Reduce Nitrogen Losses during the Winter Leaching Period after Autumn Spinach Harvesteng
dc.title.alternativeErnterückstandsmanagement nach Herbstspinat zur Minderung von Stickstoffverlusten über die Sickerwasserperiode im Winterger
dc.typeEinzelbeitrag in einer wissenschaftlichen Zeitschrift [article]ger
dc.subject.bk48.52 - Pflanzenernährung, Düngungger
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