Striking a balance between food security and water quality: A modelling analysis of agricultural management practices in mitigating non-point source phosphorus pollution

The Science of The Total Environment, Год журнала: 2025, Номер 974, С. 179135 - 179135

Опубликована: Март 30, 2025

Язык: Английский

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Measuring and modeling soil carbon sequestration under diverse cropping systems in the semiarid prairies of western Canada

Journal of Cleaner Production, Год журнала: 2021, Номер 328, С. 129614 - 129614

Опубликована: Ноя. 9, 2021

Tillage and crop residue management can have large impacts on soil organic carbon (SOC) sequestration, as well additional feedbacks productivity agricultural sustainability. The objectives of this study were to (i) evaluate the effects summer fallow, legume green manure, pea or canola in rotation with spring wheat yields, biomass production SOC dynamics (0–15 cm) from six long-term cropping systems under semiarid conditions western Canada, (ii) calibrate validate three process-based models (DNDC, DayCent DSSAT) using experimental data, (iii) investigate tillage (no-tillage (NT) vs. conventional (CT)) straw (returned removal) changes diverse systems. Over period 1987 2015, average yields Wheat (W)-Canola (C)–W-Pea (P) manure (LGM)-W-W rotations increased by 33.5 10.8%, respectively, compared continuous (ContW) Higher sequestration rates found ContW, LGM-W-W W–C–W–P mainly due higher C input larger nitrogen (N) inputs/fixation when fallow-wheat All performed "fair" "good" simulating yield, content over time across all treatments. DSSAT had lowest errors prediction for (e.g., normalized RMSE (nRMSE) ≤ 27.2%, index agreement (d) ≥ 0.79), while DNDC better estimates nRMSE 4.5%, d 0.74). Long-term scenario analysis demonstrated that mean annual based model ensemble ranged 0.03 Mg ha−1 y−1 CT removal 0.31 NT returned. Predicted potential was relatively small return This suggests which include crops store more than traditional wheat-based fallow-wheat, ContW) prairies Canada. These are already becoming common help enhance maximize they coupled management.

Язык: Английский

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Estimation of N2O and CH4 emissions in field study and DNDC model under optimal nitrogen level in rice-wheat rotation system

The Science of The Total Environment, Год журнала: 2025, Номер 974, С. 179168 - 179168

Опубликована: Март 25, 2025

Язык: Английский

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Assessing the agricultural, environmental, and economic effects of crop diversity management: A comprehensive review on crop rotation and cover crop practices

Journal of Environmental Management, Год журнала: 2025, Номер 387, С. 125833 - 125833

Опубликована: Май 23, 2025

Язык: Английский

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Sustainable water and nitrogen optimization to adapt to different temperature variations and rainfall patterns for a trade-off between winter wheat yield and N2O emissions

The Science of The Total Environment, Год журнала: 2022, Номер 854, С. 158822 - 158822

Опубликована: Сен. 15, 2022

Язык: Английский

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Diverse rotations impact microbial processes, seasonality and overall nitrous oxide emissions from soils

Soil Science Society of America Journal, Год журнала: 2021, Номер 85(5), С. 1448 - 1464

Опубликована: Июль 2, 2021

Abstract Many studies haveexamined soil‐borne nitrous oxide (N 2 O) emissions from crops, but little effort has gone into determining the N O each phase of a crop rotation. A 4‐yr study on long‐term field experiment compared growing season continuous corn (CC; Zea mays L.) and rotation involving (RC), oat (Avena Sativa L .) underseeded to alfalfa ( Medicago sativa (RO), yr (RA1, RA2). Molecular microbial biomass (DNA yield), as well N‐cycling functioning genes (mineralization, nitrification, denitrification), were also evaluated. Although cumulative RC (9.25 kg ha –1 ) significantly greater than CC (7.94 ), entire 54% lower (3.69 because low RO (3.1 RA1, RA2 (1.11–1.27 ). Years that had substantial early‐season precipitation combined with high soil inorganic plow‐down contributed elevated RC. Improved conditions fertility under increased grain yields by 35% (9.45 Mg (7.01 Microbial was 73% in CC. Nitrogen mineralization 19% they not correlated emissions, whereas bacterial nitrifiers positively correlated. Denitrification likely responsible for CC, while nitrifier‐denitrification appeared be primary pathway The processes all phases should considered environmental modeling policy decisions.

Язык: Английский

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Assessing trade-offs among productive, economic, and environmental indicators of forage systems in southern Tibetan crop-livestock integration

The Science of The Total Environment, Год журнала: 2023, Номер 876, С. 162641 - 162641

Опубликована: Март 13, 2023

Язык: Английский

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Evaluation of the DNDCv.CAN model for simulating greenhouse gas emissions under crop rotations that include winter cover crops

Soil Research, Год журнала: 2022, Номер 60(6), С. 534 - 546

Опубликована: Янв. 25, 2022

Context Process-based modelling studies can help inform conservation practices for mitigating soil surface CO2 and N2O fluxes. Aims We evaluated the ability of DeNitrification-DeComposition (DNDC) model to predict field-measured emissions in crop rotations managed with cover (CC) without (NC) under 27-year no-till field experiment South Dakota, USA. Methods Emissions were measured a 2-year corn–soybean 4-year corn–soybean–oat–winter wheat rotation. The was calibrated NC treatment against three treatments (2-year CC, CC) during growing season corn (2017) soybean (2018). Key results Across all treatments, simulated temperature (MBE, −0.73–0.29°C; RMSE, 1.47–4.03°C; NSE, 0.54–0.90; d, 0.89–0.98; R2, 0.64–0.93) moisture [water-filled porosity (wfps)] 0.03–0.06 wfps; 0.09–40.13 −0.24–0.49; 0.78–0.87; 0.45–0.69) that agreed well measurements. Predicted daily fluxes (kg C ha−1) provided ‘good’ agreement MBE (range −0.58−4.67), RMSE 2.10−7.36), d 0.68–0.93), NSE −0.92–0.79), R2 0.49–0.85). Statistics showed ‘poor’ between because peak events data less than predicted. Cumulative yields estimated by model. Conclusions DNDCv.CAN impacts diverse crops on moisture, greenhouse gas humid south-east Implications Nitrogen transformation routines effect rainfall interception water content need further investigation address variations emissions.

Язык: Английский

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Modelling the impacts of inhibitors and fertilizer placement on maize yield and ammonia, nitrous oxide and nitrate leaching losses in southwestern Ontario, Canada

Journal of Cleaner Production, Год журнала: 2022, Номер 384, С. 135511 - 135511

Опубликована: Дек. 7, 2022

Язык: Английский

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Modeling the Effects of Rice-Vegetable Cropping System Conversion and Fertilization on GHG Emissions Using the DNDC Model

Agronomy, Год журнала: 2023, Номер 13(2), С. 379 - 379

Опубликована: Янв. 28, 2023

The cropping system conversion, from rice to vegetable, showed various influences on the greenhouse gases (GHG) emission with conversion time and fertilizer/irrigation management. In this study, we evaluated DeNitrification-DeComposition (DNDC) model for predicting carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O) emissions crop yields as converted vegetable under conventional or no fertilization 2012 2014. Then, quantified long-term (40 years) impacts of rice-vegetable conversions levels (0, 50, 100 150% rate) GHGs global warming potentials (GWP) using calibrated model. DNDC model-simulated daily GHG dynamics were generally consistent measured data good predictions seasonal CH4 (coefficient determination (R2) = 0.96), CO2 (R2 0.75), N2O 0.75) 0.89) in response different systems across two years. overall performance was better than systems. Both simulated two-year higher lower positive responses fertilizations. lowest GWP without highest obtained. These results simulation results. contrast experimental data, increased rice-dominant reasonable recommended region.

Язык: Английский

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