Critical points for closing the carbon and nitrogen budgets in a winter rapeseed field

Escuer-Gatius, Jordi; Lõhmus, Krista; Shanskiy, Merrit; Kauer, Karin; Vahter, Hanna; Mander, Ülo; Astover, Alar; Soosaar, Kaido

doi:10.1007/s10705-022-10202-8

Cited by 4 publications

(1 citation statement)

References 99 publications

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“…The change of soil N content (kg N ha -1 ) was calculated according to Sainju, 2017 as the difference between the initial and final soil total N contents (Supplementary Methodology S3). N losses are calculated by substracting N outputs and change of soil N content from N inputs (Sainju et al, 2017;Escuer-Gatius et al, 2022; Supplementary Methodology S4)…”

Section: Statistical Analyses and Modellingmentioning

confidence: 99%

Comment on egusphere-2024-593

2024

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Section: Statistical Analyses and Modellingmentioning

confidence: 99%

Comment on egusphere-2024-593

2024

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Comparison of Organic and Inorganic Fertilization in Fenugreek Cultivation Using Nitrogen Indicators

Folina,

Mavroeidis,

Stavropoulos

et al. 2024

Nitrogen

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Nitrogen indices could be used to evaluate organic and inorganic fertilization because they provide quantitative measures of nitrogen availability in the soil, allowing for a more accurate assessment of nutrient-management practices and optimization of crop yields. This study investigates the impact of different fertilization types and salinity on various soil parameters in fenugreek (Trigonella foenum-graecum L.) cultivation and nitrogen indices. A field experiment was established at the Agricultural University of Athens during the cropping period of 2018–2019 (CP I), 2019–2020 (CP II), and 2020–2021 (CP III) in a split-plot design with two main salinity treatments (high salinity, HS, and conventional salinity, CS) and five fertilization treatments (biocyclic–vegan humus soil (BHS), manure (FYM), compost (COMP), inorganic fertilization (11–15–15), and the control (C). The Nitrogen Balance Intensity (NBI) was statistically significantly affected by the factors of fertilization (p ≤ 0.01) and salinity (p ≤ 0.001) for CP I. The maximum NUEcrop value was recorded in the FYM treatment (0.83 ± 0.04) and the minimum in the COMP treatment (0.64 ± 0.04). Physiological efficiency (PE) was not significantly affected by any treatment for CP III. The fertilization factor significantly affected the NUEsoil index (p ≤ 0.001) for all three CPs. For CP I, the highest Nitrogen Uptake Efficiency (NUpE) value was recorded in the BHS treatment (27.08 ± 7.31) and the lowest in the C treatment (13.22 ± 7.31). There were no significant differences in CP I and CP II NUEbalance values among the NPK, BHS, and FYM treatments. These findings underscore the potential of organic fertilizers in addressing the global nitrogen challenge and promoting environmentally sustainable farming practices.

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Interactions of fertilisation and crop productivity on soil nitrogen cycle microbiome and gas emissions

Kuusemets,

Mander,

Escuer-Gatius

et al. 2024

Preprint

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Abstract. Fertilised soils are a significant source of nitrous oxide (N2O), a highly active greenhouse gas and stratospheric ozone depleter. Nitrogen (N) fertilisers, while boosting crop yield, also lead to N2O into the atmosphere, impacting global warming. We investigated relationships between mineral N fertilisation rates and additional manure amendment with different crop types through the analysis of abundances of N cycle functional genes, soil N2O and N2 emissions, nitrogen use efficiency (NUE), soil physicochemical analysis and biomass production. Our study indicates that N2O emissions are predominantly dependent on the mineral N fertilisation rate and enhance with increased mineral N fertilisation rate. Higher N2O emissions were attained with the application of manure. Manure amendment also increased the number of N cycle genes that are significant in the change of N2O. Contrary to our hypothesis, there was no significant influence of crop type on soil N2O emissions. The study indicated dominance of nitrification over denitrification in the soil. Microbial analyses also showed the potential role of comammox and DNRA processes as a source of N2O. Our study did not find soil moisture to be significantly linked to N2O emissions. Results of the study provide evidence that for wheat, a fertilisation rate of 80 kg N ha−1 is closest to the optimal rate for balancing biomass yield, N2O emissions, and achieving high NUE. Sorghum showed potential for cultivation in temperate climate, as sorghum maintained low N2O emissions and N losses on mineral N fertilisation rate of 80 kg N ha−1.

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Critical points for closing the carbon and nitrogen budgets in a winter rapeseed field

Cited by 4 publications

References 99 publications

Comment on egusphere-2024-593

Comment on egusphere-2024-593

Comparison of Organic and Inorganic Fertilization in Fenugreek Cultivation Using Nitrogen Indicators

Interactions of fertilisation and crop productivity on soil nitrogen cycle microbiome and gas emissions

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