Non-linear response of soil N2O emissions to nitrogen fertiliser in a cotton–fallow rotation in sub-tropical Australia DOI Creative Commons
Clemens Scheer, David Rowlings, Peter Grace

и другие.

Soil Research, Год журнала: 2016, Номер 54(5), С. 494 - 494

Опубликована: Янв. 1, 2016

Nitrogen (N) fertiliser is a major source of atmospheric nitrous oxide (N2O), and over recent years there has been growing evidence for non-linear, exponential relationship between N application rate N2O emissions. However, still high level uncertainty around the emissions many cropping systems. We conducted year-round measurements emission lint yield in four N-rate treatments (0, 90, 180 270kgNha–1) cotton–fallow rotation on black vertosol Australia. observed non-linear response to increasing rates with cumulative annual 0.55, 0.67, 1.07 1.89kgNha–1 respective rates, but no occurred above 180kgNha–1. The factors induced by were 0.13, 0.29 0.50% 270kgNha–1 respectively, significantly lower than IPCC Tier 1 default value 1.0%. This nonlinear suggests that an model may be more appropriate estimating from soils cultivated cotton It also demonstrates improved agricultural N-management practices can adopted substantially reduce without affecting yield.

Язык: Английский

Sampling frequency affects estimates of annual nitrous oxide fluxes DOI Creative Commons
Louise Barton, Benjamin Wolf, David Rowlings

и другие.

Scientific Reports, Год журнала: 2015, Номер 5(1)

Опубликована: Ноя. 2, 2015

Abstract Quantifying nitrous oxide (N 2 O) fluxes, a potent greenhouse gas, from soils is necessary to improve our knowledge of terrestrial N O losses. Developing universal sampling frequencies for calculating annual fluxes difficult, as are renowned their high temporal variability. We demonstrate daily was largely required achieve within 10% the ‘best’ estimate 28 datasets collected three continents—Australia, Europe and Asia. Decreasing regularity measurements either under- or overestimated with maximum overestimation 935%. Measurement frequency lowered using strategy based on environmental factors known affect variability, but still more than once week. Consequently, uncertainty in current global budgets associated upscaling field-based can be decreased significantly adequate frequencies.

Язык: Английский

Процитировано

167
Reducing nitrous oxide emissions by changing N fertiliser use from calcium ammonium nitrate (CAN) to urea based formulations DOI Creative Commons
Mary Harty, Patrick J. Forrestal,

Catherine J. Watson

и другие.

The Science of The Total Environment, Год журнала: 2016, Номер 563-564, С. 576 - 586

Опубликована: Май 5, 2016

Язык: Английский

Процитировано

159
Effect of inhibitors and fertigation strategies on GHG emissions, NO fluxes and yield in irrigated maize DOI
Guillermo Guardia,

Max Ternero Cangani,

Gemma Andreu

и другие.

Field Crops Research, Год журнала: 2017, Номер 204, С. 135 - 145

Опубликована: Янв. 21, 2017

Язык: Английский

Процитировано

99
Increasing soil pH reduces fertiliser derived N2O emissions in intensively managed temperate grassland DOI Creative Commons
Ognjen Žurovec, David P. Wall, Fiona Brennan

и другие.

Agriculture Ecosystems & Environment, Год журнала: 2021, Номер 311, С. 107319 - 107319

Опубликована: Янв. 25, 2021

Soil pH is generally considered a master variable, controlling wide range of physical, chemical and biological properties, including significant effect on microbial processes responsible for production consumption nitrous oxide (N2O), potent greenhouse gas. Evidence this impact denitrification mainly stems from observations in controlled laboratory experiments, while the results field studies are short-term, more variable circumstantial. also one main factors availability soil phosphorous (P), which has been linked with N2O emissions. Here, we utilised an existing intensive grassland liming P trial to investigate longer-term lime management their interaction emissions productivity. The treatment plots were subject different fertilisation strategies over 8 years had gradient (5.1–6.9) extractable (2.3–8.3 mg kg−1). All received total 300 kg ha−1 fertiliser nitrogen (N), applied splits across growing season. emissions, mineral N grass yields measured 12-month period. We found negative linear relationship between cumulative decrease up 39 % limed compared unlimed control. same was observed relation emission yield-scaled Extractable content positive yields, but no or terms direct estimated that increase grasslands Ireland last 12 potentially reduced national by 95 Gg CO2-eq yr−1, potential further reduction 254 yr−1 if all remaining acidic soils brought optimal pH.

Язык: Английский

Процитировано

61
Cover crops and N fertilization affect soil ammonia volatilization and N2O emission by regulating the soil labile carbon and nitrogen fractions DOI
Zhenggui Zhang, Jian Wang, Weibin Huang

и другие.

Agriculture Ecosystems & Environment, Год журнала: 2022, Номер 340, С. 108188 - 108188

Опубликована: Сен. 23, 2022

Язык: Английский

Процитировано

42
Optimizing drip irrigation and nitrogen fertilization regimes to reduce greenhouse gas emissions, increase net ecosystem carbon budget and reduce carbon footprint in saline cotton fields DOI
Chao Xiao, Fucang Zhang, Yi Li

и другие.

Agriculture Ecosystems & Environment, Год журнала: 2024, Номер 366, С. 108912 - 108912

Опубликована: Фев. 19, 2024

Язык: Английский

Процитировано

18
Effect of cover crops on greenhouse gas emissions in an irrigated field under integrated soil fertility management DOI Creative Commons
Guillermo Guardia, Diego Ábalos,

Sonia García‐Marco

и другие.

Biogeosciences, Год журнала: 2016, Номер 13(18), С. 5245 - 5257

Опубликована: Сен. 20, 2016

Abstract. Agronomical and environmental benefits are associated with replacing winter fallow by cover crops (CCs). Yet, the effect of this practice on nitrous oxide (N2O) emissions remains poorly understood. In context, a field experiment was carried out under Mediterranean conditions to evaluate traditional (F) vetch (Vicia sativa L.; V) or barley (Hordeum vulgare B) greenhouse gas (GHG) during intercrop maize (Zea mays L.) cropping period. The fertilized following integrated soil fertility management (ISFM) criteria. Maize nitrogen (N) uptake, mineral N concentrations, temperature moisture, dissolved organic carbon (DOC) GHG fluxes were measured experiment. Our (adjusted synthetic rates due ISFM) pedo-climatic resulted in low cumulative N2O (0.57 0.75 kg N2O-N ha−1 yr−1), yield-scaled (3–6 g aboveground uptake−1) surplus (31 56 ha−1) for all treatments. Although CCs increased period compared F (1.6 2.6 times B V, respectively), ISFM similar at end higher C : ratio residue led greater proportion losses from fertilizer these plots when V. No significant differences observed CH4 CO2 This study shows that use both legume nonlegume combined could provide, addition advantages reported previous studies, an opportunity maximize agronomic efficiency (lowering requirements subsequent cash crop) without increasing losses.

Язык: Английский

Процитировано

77
Dynamic biochar effects on soil nitrous oxide emissions and underlying microbial processes during the maize growing season DOI
Joseph D. Edwards, Cameron M. Pittelkow, Angela D. Kent

и другие.

Soil Biology and Biochemistry, Год журнала: 2018, Номер 122, С. 81 - 90

Опубликована: Апрель 14, 2018

Язык: Английский

Процитировано

70
Diurnal variability in soil nitrous oxide emissions is a widespread phenomenon DOI Creative Commons
Yuk‐Faat Wu, Jeanette Whitaker, Sylvia Toet

и другие.

Global Change Biology, Год журнала: 2021, Номер 27(20), С. 4950 - 4966

Опубликована: Июль 7, 2021

Abstract Manual measurements of nitrous oxide (N 2 O) emissions with static chambers are commonly practised. However, they generally do not consider the diurnal variability N O flux, and little is known about patterns drivers such variability. We systematically reviewed analysed 286 data sets fluxes from published literature to (i) assess prevalence timing (day or night peaking) flux in agricultural forest soils, (ii) examine relationship between soil temperature different patterns, (iii) identify whether non‐diurnal factors (i.e. land management properties) influence occurrence (iv) evaluate accuracy estimating cumulative single‐daily measurements. Our synthesis demonstrates that a widespread phenomenon soils. Of analysed, ~80% exhibited ~60% peaking during day ~20% at night. Contrary many observations, our analysis only found strong positive correlations ( R > 0.7) one‐third sets. Soil drainage property, water‐filled pore space (WFPS) level use were also potentially certain patterns. work demonstrated mid‐morning yielded daily emission estimates smallest average bias compared made other times day, however, it could still lead significant over‐ underestimation due inconsistent This inconsistency reflects inaccuracy using predict time flux. Future research should investigate parameters, as photosynthetically active radiation (PAR) root exudation, along consideration effects moisture, on The information be incorporated prediction models improve accuracy.

Язык: Английский

Процитировано

45
Mitigating greenhouse gas emissions and ammonia volatilization from cotton fields by integrating cover crops with reduced use of nitrogen fertilizer DOI

Guilan Sun,

Zhenggui Zhang, Shiwu Xiong

и другие.

Agriculture Ecosystems & Environment, Год журнала: 2022, Номер 332, С. 107946 - 107946

Опубликована: Март 8, 2022

Язык: Английский

Процитировано

30