How does deep-band fertilizer placement reduce N2O emissions and increase maize yields?

2021 ◽  
Vol 322 ◽  
pp. 107672
Author(s):  
Peng Wu ◽  
Guangzhou Chen ◽  
Fu Liu ◽  
Tie Cai ◽  
Peng Zhang ◽  
...  
Keyword(s):  
N2o Emissions ◽  
Fertilizer Placement ◽  
Maize Yields

scholarly journals Greenhouse Gas Emissions from an Ornamental Crop as Impacted by Two Best Management Practices: Irrigation Delivery and Fertilizer Placement1

2018 ◽  
Vol 36 (2) ◽  
pp. 58-65
Author(s):  
Anna-Marie Murphy ◽  
G. Brett Runion ◽  
Stephen A. Prior ◽  
H. Allen Torbert ◽  
Jeff L. Sibley ◽  
...  
Keyword(s):  
Greenhouse Gas ◽  
Best Management Practices ◽  
Management Practices ◽  
Production Systems ◽  
Ghg Emissions ◽  
N2o Emissions ◽  
Fertilizer Placement ◽  
Closed Chamber ◽  
Row Crops ◽  
Buxus Microphylla

Abstract Agriculture is one of the largest contributors of greenhouse gas (GHG) emissions. To date, much work on reducing GHG emissions has centered on row crops, pastures, forestry, and animal production systems, while little emphasis has been placed on specialty crop industries such as horticulture. In this horticulture container study, Japanese boxwood (Buxus microphylla Siebold & Zucc.) was used to evaluate the interaction of irrigation (overhead vs drip) and fertilizer placement (dibble vs incorporated) on GHG emissions (CO2, N2O, and CH4). Plants were grown in 11.4 L (#3) containers with a 6:1 pine bark:sand substrate with standard amendments. All containers received 6.35 mm (0.25 in) water three times daily. Gas samples were collected in situ using the static closed chamber method according to standard protocols and analyzed using gas chromatography. Total cumulative CO2 loss was not affected by differences in irrigation or fertilizer placement. Total cumulative N2O efflux was least for drip-irrigated plants, regardless of fertilizer placement. For overhead-irrigated plants, N2O efflux was greatest for those with incorporated fertilizer. Efflux of CH4 was generally low throughout the study. Findings suggest that utilizing drip irrigation could decrease N2O emissions, regardless of fertilizer placement. However, when limited to overhead irrigation, dibbled fertilizer placement could decrease N2O emissions. Index words: carbon dioxide, methane, nitrous oxide, trace gas Species used in this study: Japanese boxwood (Buxus microphylla Siebold & Zucc.)

scholarly journals Deep N fertilizer placement mitigated N2O emissions in a Swedish field trial with cereals

2020 ◽  
Vol 118 (2) ◽  
pp. 133-148
Author(s):  
Katrin Rychel ◽  
Katharina H. E. Meurer ◽  
Gunnar Börjesson ◽  
Monika Strömgren ◽  
Gizachew Tarekegn Getahun ◽  
...  
Keyword(s):  
Field Trial ◽  
Mineral Soil ◽  
Weather Conditions ◽  
N Use Efficiency ◽  
N2o Emissions ◽  
Fertilizer Placement ◽  
Use Efficiency ◽  
Placement Depth ◽  
N Use ◽  
Increase Crop Yield

Abstract Deep fertilizer placement is a proposed strategy to increase crop yield and nitrogen (N) use efficiency while decreasing nitrous oxide (N2O) emissions from soil to atmosphere. Our objective was to test three fertilization depth orientations to compare overall N use efficiency, based on a 2-year field trial on a mineral soil cropped with cereals in Uppsala, Sweden. The field was fertilized with ammonium nitrate at a rate of 120 kg ha−1 (2016) and 105 kg ha−1 (2017) and a deep fertilizer placement (DP) at 0.20 m was compared to a shallow placement (SP) at 0.07 m and a mixed-depth placement (MP) where fertilizer was halved between the depths of 0.07 and 0.20 m, and a non-fertilized control (NF). In 2016, compared to SP, MP and DP increased N content in harvested grain by 3.6% and 2.5% respectively, and DP increased grain yield by 11% (P < 0.05). In both years, N2O emissions were similar in DP and NF, whereas SP and MP emissions were similar but generally higher than those in DP and NF. Fertilizer-induced emission factors (EF) for the growing season of 2017 decreased with fertilizer placement depth and were 0.77 ± 0.07, 0.58 ± 0.03, and 0.10 ± 0.02 for SP, MP, and DP, repectively. Although deep N placement benefits are likely dependent on weather conditions and soil type, this strategy has a clear potential for mitigating N2O emissions without adversely affecting yield.

scholarly journals Combination of Compost and Mineral Fertilizers as an Option for Enhancing Maize (Zea mays L.) Yields and Mitigating Greenhouse Gas Emissions from a Nitisol in Ethiopia

Agronomy ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 2097
Author(s):  
Gebeyanesh Worku Zerssa ◽  
Dong-Gill Kim ◽  
Philipp Koal ◽  
Bettina Eichler-Löbermann
Keyword(s):  
Zea Mays ◽  
Greenhouse Gas ◽  
Field Trial ◽  
Zea Mays L ◽  
Pore Space ◽  
Ghg Emissions ◽  
Mineral Fertilizers ◽  
N2o Emissions ◽  
N Supply ◽  
Maize Yields

Combined application of organic and mineral fertilizers has been proposed as a measure for sustainable yield intensification and mitigation of greenhouse gas (GHG) emissions. However, fertilizer effects strongly depend on the soil type and still no precise information is available for Nitisols in Ethiopia. The study evaluated effects of different ratios of biowaste compost and mineral fertilizers (consisting of nitrogen (N), phosphorus (P), and sulphur (S)) on maize (Zea mays L. Bako-hybrid) yields in a two-year field trial. Soil samples from each treatment of the field trial were used to estimate emissions of nitrous oxide (N2O), carbon dioxide (CO2), methane (CH4), and microbial activity in a 28-day incubation experiment with two moisture levels (40% and 75% water-filled pore space, WFPS). The application of fertilizers corresponded to a N supply of about 100 kg ha−1, whereby the pure application of mineral fertilizers (100 min) was gradually replaced by compost. Maize yields were increased by 12 to 18% (p < 0.05) in the combined treatments of compost and mineral fertilizers compared to the 100 min treatment. The cumulative emissions of N2O and CO2 but not CH4 were affected by the fertilizer treatments and soil moisture levels (p < 0.05). At 75% WFPS, the N2O emissions in the 100 min treatment was with 16.3 g ha−1 more than twice as high as the treatment with 100% compost (6.4 g ha−1) and also considerably higher than in the 50% compost treatment (9.4 g ha−1). The results suggest that a compost application accounting for 40 to 70% of the N supply in the fertilizer combinations can be suitable to increase maize yields as well as to mitigate GHG emissions from Nitisols in Southwestern Ethiopia.

Fertilizer Placement Influences Profit: A look back to 1938

2018 ◽  
Vol 102 (3) ◽  
pp. 24-25
Author(s):  
Lewis Watson
Keyword(s):  
Fertilizer Placement ◽  
Look Back

Analysis of N2O emissions from the agro-ecosystem in Fujian Province

2014 ◽  
Vol 22 (2) ◽  
pp. 225-233
Author(s):  
Yanchun LI ◽  
Yixiang WANG ◽  
Chengji WANG ◽  
Bailong ZHENG ◽  
Yibin HUANG
Keyword(s):  
N2o Emissions ◽  
Fujian Province

Agronomic Evaluation of Fertilizer Placement Methods for No-Tillage Sorghum in Vertisol Clays

jpa ◽  
1992 ◽  
Vol 5 (3) ◽  
pp. 378-382 ◽  
Author(s):  
F. W. Chichester ◽  
J. E. Morrison
Keyword(s):  
No Tillage ◽  
Fertilizer Placement ◽  
Agronomic Evaluation

Impact of sewage sludge applications on the biogeochemistry of soils

2008 ◽  
Vol 57 (6) ◽  
pp. 963-963
Author(s):  
D. Devaney ◽  
A. R. Godley ◽  
M. E. Hodson ◽  
K. Purdy ◽  
S. Yamulki
Keyword(s):  
Sewage Sludge ◽  
N2o Emissions ◽  
Correct Version ◽  
Main Text

Unfortunately an incorrect version of Figure 4 appears on p517 of this paper; the correct version is as printed below. A sentence (“Increased N2O emissions…. Conversely”) should then also be deleted from the corresponding paragraph of the main text as printed on pp516–517; the correct version of this paragraph is also given below. The authors and publisher regret any confusion or inconvenience this may have caused.

scholarly journals Biochar and urease inhibitor mitigate NH3 and N2O emissions and improve wheat yield in a urea fertilized alkaline soil

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Khadim Dawar ◽  
Shah Fahad ◽  
M. M. R. Jahangir ◽  
Iqbal Munir ◽  
Syed Sartaj Alam ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Grain Yield ◽  
Block Design ◽  
N Uptake ◽  
Nitrous Oxide Emissions ◽  
N2o Emissions ◽  
Urease Inhibitor ◽  
Alkaline Soil ◽  
Total N ◽  
N Assimilation

AbstractIn this study, we explored the role of biochar (BC) and/or urease inhibitor (UI) in mitigating ammonia (NH3) and nitrous oxide (N2O) discharge from urea fertilized wheat cultivated fields in Pakistan (34.01°N, 71.71°E). The experiment included five treatments [control, urea (150 kg N ha−1), BC (10 Mg ha−1), urea + BC and urea + BC + UI (1 L ton−1)], which were all repeated four times and were carried out in a randomized complete block design. Urea supplementation along with BC and BC + UI reduced soil NH3 emissions by 27% and 69%, respectively, compared to sole urea application. Nitrous oxide emissions from urea fertilized plots were also reduced by 24% and 53% applying BC and BC + UI, respectively, compared to urea alone. Application of BC with urea improved the grain yield, shoot biomass, and total N uptake of wheat by 13%, 24%, and 12%, respectively, compared to urea alone. Moreover, UI further promoted biomass and grain yield, and N assimilation in wheat by 38%, 22% and 27%, respectively, over sole urea application. In conclusion, application of BC and/or UI can mitigate NH3 and N2O emissions from urea fertilized soil, improve N use efficiency (NUE) and overall crop productivity.

scholarly journals Higher Sensitivity of Soil Microbial Network Than Community Structure under Acid Rain

2021 ◽  
Vol 9 (1) ◽  
pp. 118
Author(s):  
Ziqiang Liu ◽  
Hui Wei ◽  
Jiaen Zhang ◽  
Muhammad Saleem ◽  
Yanan He ◽  
...  
Keyword(s):  
Community Structure ◽  
Acid Rain ◽  
Natural Soil ◽  
Available Phosphorus ◽  
Global Changes ◽  
N2o Emissions ◽  
Ammonia Oxidizing Bacteria ◽  
Soil Core ◽  
N Cycle ◽  
Microbial Network

Acid rain (AR), as a global environmental threat, has profoundly adverse effects on natural soil ecosystems. Microorganisms involved in the nitrogen (N) cycle regulate the global N balance and climate stabilization, but little is known whether and how AR influences the structure and complexity of these microbial communities. Herein, we conducted an intact soil core experiment by manipulating the acidity of simulated rain (pH 7.5 (control, CK) vs. pH 4.0 (AR)) in subtropical agricultural soil, to reveal the differences in the structure and complexity of soil nitrifying and denitrifying microbiota using Illumina amplicon sequencing of functional genes (amoA, nirS, and nosZ). Networks of ammonia-oxidizing archaea (AOA) and nirS-carrying denitrifiers in AR treatment were less complex with fewer nodes and lower connectivity, while network of nosZ-carrying denitrifiers in AR treatment had higher complexity and connectivity relative to CK. Supporting this, AR reduced the abundance of keystone taxa in networks of AOA and nirS-carrying denitrifiers, but increased the abundance of keystone taxa in nosZ-carrying denitrifiers network. However, AR did not alter the community structure of AOA, ammonia-oxidizing bacteria (AOB), nirS-, and nosZ-carrying denitrifiers. Moreover, AR did not change soil N2O emissions during the experimental period. AOB community structure significantly correlated with content of soil available phosphorus (P), while the community structures of nirS- and nosZ-carrying denitrifiers both correlated with soil pH and available P content. Soil N2O emission was mainly driven by the nirS-carrying denitrifiers. Our results present new perspective on the impacts of AR on soil N-cycle microbial network complexity and keystone taxa in the context of global changes.

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