Nutrient Cycling in Agroecosystems最新文献

{"title":"Temporal dynamics of N₂O emissions from pasture urine patches: drivers and source processes.","authors":"Lena Barczyk, Markus Jocher, Julius Havsteen, Joachim Mohn, Johan Six, Christof Ammann","doi":"10.1007/s10705-026-10498-w","DOIUrl":"10.1007/s10705-026-10498-w","url":null,"abstract":"<p><p>Nitrous oxide fluxes from urine patches (F(N₂O)_urine) of grazing livestock are variable over time due to fluctuations in driving parameters, such as soil temperature, water-filled pore space (WFPS), and availability of the source substrates ammonium and nitrate. Therefore, the frequency and timing of flux measurements after urine application are important when determining cumulative F(N₂O)_urine. In this study, F(N₂O)_urine was measured in eight experiments at high temporal frequency using an automatic chamber system in a pasture located in Switzerland. A driver analysis using random forest identified the time since urine application as most important predictor for F(N₂O)_urine. The exponential decay in F(N₂O)_urine after urine addition was in parallel to decreasing soil ammonium but anticorrelated to nitrate concentration, suggesting that nitrification and nitrifier denitrification are major source processes. Since nitrate showed elevated concentrations up to 122 days after application, bacterial denitrification is most likely responsible for late F(N₂O)_urine peaks following an increase of WFPS. The isotopic composition of the emitted N₂O indicates that nitrification dominates the N₂O production immediately after urine application, while bacterial denitrification and nitrifier denitrification become more important with increasing time since urine application. The observed high-frequency emission time series were also used to simulate typical low-frequent manual chamber sampling schedules. They led to considerable deviations (up to ± 30%) of the time-integrated N₂O emission. However, the average bias was considerably smaller (- 5%) for the prescribed sampling schedule, indicating that manual chamber measurements can reasonably quantify average total N₂O emissions from urine patches under the present pedoclimatic conditions.</p>","PeriodicalId":19336,"journal":{"name":"Nutrient Cycling in Agroecosystems","volume":"133 1","pages":"5"},"PeriodicalIF":3.2,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13672584/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149216538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nitrogen use efficiency and yield gains from <i>Stylosanthes guianensis</i> integration in upland rice: insights from a ¹⁵N-labelling study under conservation agriculture.","authors":"Oliver Zemek, Astrid Oberson, Julie Dusserre, Eric Scopel, Emmanuel Frossard","doi":"10.1007/s10705-025-10458-w","DOIUrl":"10.1007/s10705-025-10458-w","url":null,"abstract":"<p><p>Efficient nitrogen (N) use remains a key challenge for upland rice production on weathered tropical soils, particularly in low-input smallholder systems where external inputs are limited and nutrient cycling is constrained. This study assessed the effects of integrating the legume <i>Stylosanthes guianensis</i> (stylo) into a conservation agriculture (CA) rotation on rice N use efficiency (NUE), and biomass productivity in Madagascar's Midwest Highlands. A factorial field experiment tested soil tillage, stylo biomass management (retention, removal, incorporation), and N fertilizer types (none, farmyard manure, mineral fertilizer), using ¹⁵N isotope labelling techniques, which allowed us to quantify N sources and recovery pathways with high resolution. Mineral fertilizer resulted in the highest grain yield (429 g DM m^-2), N uptake (6.1 g N m^-2), and ¹⁵N recovery (52%), surpassing global NUE benchmarks. In the absence of fertilizer, rotation with stylo increased grain yield by 53% and N uptake by 43% compared to continuous rice (189 g DM m^-2; 2.3 g N m^-2), reflecting strong biological and structural legacy effects. Although stylo mulch had a high C:N ratio and contributed minimally to direct N uptake, it improved soil moisture and likely promoted conditions favourable to N mineralization. Tillage effects on N uptake and yield were negligible. These findings demonstrate that legume integration under CA can improve N cycling, enhance fertilizer N recovery, and significantly increase NUE and yield resilience in smallholder systems. Future strategies should explore how partitioning legume biomass between soil cover and fodder affects nutrient flows, and whether livestock-mediated recycling can help close N loops in mixed farming systems.</p><p><strong>Supplementary information: </strong>The online version contains supplementary material available at 10.1007/s10705-025-10458-w.</p>","PeriodicalId":19336,"journal":{"name":"Nutrient Cycling in Agroecosystems","volume":"132 1","pages":"5"},"PeriodicalIF":3.2,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12685974/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145724856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Coupling observational methods and the DayCent model to improve examinations of N₂O production pathways.","authors":"Shauna-Kay Rainford, Julius C Havsteen, Joachim Mohn, Christof Ammann, Sonja G Keel","doi":"10.1007/s10705-026-10504-1","DOIUrl":"10.1007/s10705-026-10504-1","url":null,"abstract":"<p><p>The traditional calibration approach for process-based models, such as DayCent, consists of the iterative adjustment of model parameters and comparison of the simulated total N₂O flux to measured observations. However, the contributions of individual production pathways, namely nitrification and denitrification, are uncertain. Here, N₂O emissions from the soil of sugar beet plots with control (Null) and mineral (NPK) fertilizer treatments were measured by a static chamber technique. The isotopic composition of emitted N₂O was analyzed to identify the N₂O production pathways. The latter showed that denitrification was the predominant source of N₂O emissions at this site. The model's default settings strongly overestimated the contributions of nitrification. This incorrect allocation of N₂O emissions to nitrification could partly be explained by the model's tendency to underestimate the soil water content during the growing season. DayCent model parameters were also manually adjusted to better represent the observation derived contributions of nitrification and denitrification. Although, this \"expert-informed approach\", showed a slightly lower performance concerning the cumulative N₂O flux (Null: RMSE = 0.37 kg N ha^-1 yr^-1, NPK: RMSE = 0.50 kg N ha^-1 yr^-1) than the traditional calibration (Null: RMSE = 0.15 kg N ha^-1 yr^-1, NPK: RMSE = 0.10 kg N ha^-1 yr^-1), it may be considered as more representative because it better reflected the higher contribution from denitrification shown by the isotope data. This study demonstrates that the inclusion of observational methods, such as isotope measurements, can provide important insight into model function and improve pathway-specific estimation of N₂O emissions in DayCent.</p><p><strong>Supplementary information: </strong>The online version contains supplementary material available at 10.1007/s10705-026-10504-1.</p>","PeriodicalId":19336,"journal":{"name":"Nutrient Cycling in Agroecosystems","volume":"133 1","pages":"6"},"PeriodicalIF":3.2,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13190764/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148016608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Large nitrous oxide emissions from arable soils after crop harvests prior to sowing.","authors":"Regine Maier, Lukas Hörtnagl, Nina Buchmann","doi":"10.1007/s10705-024-10395-0","DOIUrl":"10.1007/s10705-024-10395-0","url":null,"abstract":"<p><p>Global agriculture is the largest anthropogenic source for nitrous oxide (N₂O) emissions. During crop rotations, periods with arable soils without crops, thereafter called \"bare soils\" are often impossible to avoid after the crop is harvested, prior to sowing of the next crop. However, such periods are underrepresented in studies focussing on N₂O emissions. Here, we present continuous, high-temporal-resolution N₂O fluxes during bare soil periods after four major crops, using the eddy-covariance technique at two sites in Switzerland. Overall, periods with bare soil were net sources for N₂O as well as for carbon dioxide (CO₂) and methane (CH₄). Daily average sums of N₂O emissions varied between 10 ± 2 and 38 ± 5 g N₂O-N ha^-1 d^-1 after the respective rapeseed, winter wheat, pea, and maize harvests. While CO₂ emissions contributed 86-96% to the total GHG budgets, N₂O fluxes accounted for 2% after pea, but for 10-12% after rapeseed, winter wheat, and maize. In contrast, CH₄ fluxes were negligible (< 2%). N₂O fluxes during bare soil periods increased for all cropland sites with increasing water-filled pore space, particularly at high soil temperatures. Thus, our study emphasizes the significance of avoiding bare soil periods to mitigate N₂O emissions from croplands.</p><p><strong>Supplementary information: </strong>The online version contains supplementary material available at 10.1007/s10705-024-10395-0.</p>","PeriodicalId":19336,"journal":{"name":"Nutrient Cycling in Agroecosystems","volume":"130 2","pages":"161-175"},"PeriodicalIF":2.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11950146/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143753844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Simulation-based assessment of residue management to mitigate N loss risk in winter wheat production","authors":"S. Rothardt, Henning Kage","doi":"10.1007/s10705-023-10331-8","DOIUrl":"https://doi.org/10.1007/s10705-023-10331-8","url":null,"abstract":"","PeriodicalId":19336,"journal":{"name":"Nutrient Cycling in Agroecosystems","volume":"91 6","pages":"1-19"},"PeriodicalIF":3.1,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139444589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mitigate N2O emissions while maintaining sugarcane yield using enhanced efficiency fertilisers and reduced nitrogen rates","authors":"S. Reeves, Weijin Wang, Stephen Ginns","doi":"10.1007/s10705-023-10323-8","DOIUrl":"https://doi.org/10.1007/s10705-023-10323-8","url":null,"abstract":"","PeriodicalId":19336,"journal":{"name":"Nutrient Cycling in Agroecosystems","volume":"50 s25","pages":""},"PeriodicalIF":3.1,"publicationDate":"2023-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138967870","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Are nitrification inhibitors effective in reducing N2O from farm-scale emission hotspots?","authors":"K. Marsden, Camila A. dos Santos, J. Friedl, D. Rowlings, Dave R. Chadwick, Richard J. Eckard","doi":"10.1007/s10705-023-10322-9","DOIUrl":"https://doi.org/10.1007/s10705-023-10322-9","url":null,"abstract":"","PeriodicalId":19336,"journal":{"name":"Nutrient Cycling in Agroecosystems","volume":"14 6","pages":""},"PeriodicalIF":3.1,"publicationDate":"2023-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138589936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"One-time root-zone fertilization of controlled-release urea increases nitrogen use efficiency while reducing nitrogen loss risk in a ratoon rice field under two irrigation practices","authors":"Zijuan Ding, Jintao Li, Fei Huang, Ren Hu, Shaobing Peng, Jianliang Huang, Jun Hou, Jianli Zhou, Chengfang Li, Bing Su, Mingjian Xu","doi":"10.1007/s10705-023-10328-3","DOIUrl":"https://doi.org/10.1007/s10705-023-10328-3","url":null,"abstract":"","PeriodicalId":19336,"journal":{"name":"Nutrient Cycling in Agroecosystems","volume":"22 2","pages":""},"PeriodicalIF":3.1,"publicationDate":"2023-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138587693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On-farm use of recycled liquid ammonium sulphate in Southwest Germany using a participatory approach","authors":"Benedikt Müller, Jens Hartung, M. von Cossel, I. Lewandowski, Torsten Müller, Andrea Bauerle","doi":"10.1007/s10705-023-10329-2","DOIUrl":"https://doi.org/10.1007/s10705-023-10329-2","url":null,"abstract":"","PeriodicalId":19336,"journal":{"name":"Nutrient Cycling in Agroecosystems","volume":"112 15","pages":""},"PeriodicalIF":3.1,"publicationDate":"2023-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138607288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spatial distribution and environmental risk of soil phosphorus under a long-term fertilizer strategy in a rice–wheat rotation system","authors":"Yuan-hong Wang, Yutao Cui, Shunjin Li, Huaiyu Yang, Wei Zhang","doi":"10.1007/s10705-023-10326-5","DOIUrl":"https://doi.org/10.1007/s10705-023-10326-5","url":null,"abstract":"","PeriodicalId":19336,"journal":{"name":"Nutrient Cycling in Agroecosystems","volume":"443 ","pages":""},"PeriodicalIF":3.1,"publicationDate":"2023-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139244735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}