scholarly journals Replacing Mineral Fertilisers for Bio-Based Fertilisers in Potato Growing on Sandy Soil: A Case Study

2021 ◽  
Vol 12 (1) ◽  
pp. 341
Author(s):  
Chantal M. J. Hendriks ◽  
Vaibhav Shrivastava ◽  
Ivona Sigurnjak ◽  
Jan Peter Lesschen ◽  
Erik Meers ◽  
...  
Keyword(s):  
Sandy Soil ◽  
Release Rate ◽  
Field Trial ◽  
Greenhouse Gas Emission ◽  
Liquid Fraction ◽  
Full Scale ◽  
N2o Emissions ◽  
Significant Difference ◽  
N Release ◽  
Scale Field

The refinement level of bio-based fertilisers (BBFs) can influence environmental and agronomic performance. This study analyses the environmental and agronomic effect of different BBFs on potato growing in sandy soil. A less refined product (liquid fraction of digestate (LFD)), two refined products (ammonium sulphate (AS) and potassium concentrate (KC)), and mineral fertilizer (MF) are compared by conducting: (i) a nitrogen (N) incubation experiment where the N release rate of the BBFs is determined, (ii) a greenhouse gas emission experiment where N2O, CO2, and CH4 emissions after BBF application are measured, (iii) a pot experiment where the nutrient fertiliser replacement value (NFRV) of the BBF is calculated, and (iv) a full-scale field trial where the potato quality and quantity and the remaining N residues in the soil after harvest are assessed. The N release rate and the NFRV of AS (142 ± 19% and 1.13, respectively) was higher compared with the LFD (113 ± 24% and 1.04) and MF (105 ± 16% and 1.00). Lowest N2O emissions were observed after the application of the less refined product (0.02 ± 0.01 per 100 g N applied) and highest for MF urea (0.11 ± 0.02 per 100 g N applied). In the full-scale field trial, no significant difference in potato yield was observed in the plots that received manure in combination with BBF or MF. This study showed that all three BBFs can safely be used in potato growing on sandy soils. However, the adoption of BBFs can be stimulated by (i) solving the practical issues that occurred during the application of LFD, (ii) making sure BBFs are on the list of RENURE materials so they can legally replace mineral fertiliser, and (iii) reducing the surplus of slurry manure to stimulate the use and fair pricing of BBF products.

Nitrous oxide emission during nitrification and denitrification in a full-scale night soil treatment plant

1996 ◽  
Vol 34 (1-2) ◽  
pp. 277-284 ◽  
Author(s):  
Hiroki Itokawa ◽  
Keisuke Hanaki ◽  
Tomonori Matsuo
Keyword(s):  
Nitrous Oxide ◽  
Treatment Plant ◽  
Full Scale ◽  
Soil Treatment ◽  
Aeration Tank ◽  
N2o Emissions ◽  
N2o Production ◽  
Mixed Liquor ◽  
Significant Difference ◽  
Nitrification And Denitrification

Nitrous oxide (N2O) emissions from nitrification-denitrification processes in a full-scale night soil treatment plant were measured, and patterns and control of the N2O production were investigated. Estimated N2O emissions ranged from 4.4 to 1,190 gN/(m3 of influent), corresponding to a conversion ratio of influent nitrogen to N2O-N of 0.24-55%. N2O was produced in the intermittent aeration tank (IAT) where nitrification and denitrification were carried out alternately. The produced N2O was either stripped out to the off-gas or remained in the effluent in dissolved form. The former accounted for more than 99.5% of the total emissions. The latter flowed into the following anoxic tank, where 60-98% of N2O was reduced. A significant difference in the extent of N2O supersaturation in mixed liquor of IAT was observed between the cases of high and low N2O emissions. In IAT, N2O tended to be produced discretely either in aerobic or in anoxic phases. It seemed that the completeness of nitrification and denitrification in IAT, indicated from a mass balance between NH4-N and NO3-N and from NO2-N accumulation in mixed liquor of IAT, was one of the important factors affecting the N2O production. This completeness was decided by the time ratio of aerobic and anoxic phases. External addition of methanol to IAT seemed to reduce N2O emissions.

scholarly journals Performance comparison of green roof hydrological models for full-scale field sites

2021 ◽  
pp. 100093
Author(s):  
Ico Broekhuizen ◽  
Santiago Sandoval ◽  
Hanxue Gao ◽  
Felipe Mendez-Rios ◽  
Günther Leonhardt ◽  
...  
Keyword(s):  
Green Roof ◽  
Performance Comparison ◽  
Full Scale ◽  
Hydrological Models ◽  
Scale Field

scholarly journals Poultry Litter, Biochar, and Fertilizer Effect on Corn Yield, Nutrient Uptake, N2O and CO2 Emissions

Environments ◽  
2019 ◽  
Vol 6 (5) ◽  
pp. 55 ◽  
Author(s):  
Karamat R. Sistani ◽  
Jason R. Simmons ◽  
Marcia Jn-Baptiste ◽  
Jeff M. Novak
Keyword(s):  
Grain Yield ◽  
Co2 Emissions ◽  
Greenhouse Gas Emission ◽  
Poultry Litter ◽  
First Year ◽  
Corn Yield ◽  
Soil Microbial ◽  
Significant Difference ◽  
Biomass Yields ◽  
Corn Productivity

Biochar holds promise as a soil amendment with potential to sequester carbon, improve soil fertility, adsorb organic pollutants, stimulate soil microbial activities, and improve crop yield. We used a hardwood biochar to assess its impact on corn (Zea mays) grain, biomass yields and greenhouse gas emission in central Kentucky, USA. Six treatments included as follows: control (C) with no amendment applied; poultry litter (PL); biochar (B); biochar + poultry litter (B + PL); fertilizers N-P-K (F); and biochar + fertilizers (B + F). Biochar was applied only once to plots in 2010 followed by rototilling all plots. Only PL and fertilizer were applied annually. When applied alone, biochar did not significantly increase dry matter, grain yield, and N-P-K uptake. There was also no significant difference between the combined treatments when compared with PL or F applications alone. We observed a slight increasing trend in corn grain yield in the following 2 years compared to the first year from biochar treatment. Poultry litter treatment produced significantly greater N2O and CO2 emissions, but emissions were lower from the B+PL treatment. We conclude that this biochar did not improve corn productivity in the short term but has potential to increase yield in the long term and may have some benefit when combined with PL or F in reducing N2O and CO2 emissions.

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