Effects of three frequencies of irrigation and nitrogen rates on lint yield, nitrogen use efficiency and fibre quality of cotton under furrow irrigation

Agricultural Water Management, Год журнала: 2021, Номер 248, С. 106783 - 106783

Опубликована: Фев. 5, 2021

Язык: Английский

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Assessment of greenhouse gases emissions, global warming potential and net ecosystem economic benefits from wheat field with reduced irrigation and nitrogen management in an arid region of China

Agriculture Ecosystems & Environment, Год журнала: 2022, Номер 341, С. 108197 - 108197

Опубликована: Окт. 7, 2022

Язык: Английский

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Effect of nitrification and urease inhibitors on nitrous oxide and methane emissions from an oat crop in a volcanic ash soil

Agriculture Ecosystems & Environment, Год журнала: 2016, Номер 238, С. 46 - 54

Опубликована: Июль 16, 2016

Язык: Английский

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The effects of aeration and irrigation regimes on soil CO2 and N2O emissions in a greenhouse tomato production system

Journal of Integrative Agriculture, Год журнала: 2018, Номер 17(2), С. 449 - 460

Опубликована: Фев. 1, 2018

Aerated irrigation has been proven to increase crop production and quality, but studies on its environmental impacts are sparse. The effects of aeration regimes soil CO2 N2O emissions in two consecutive greenhouse tomato rotation cycles Northwest China were studied via the static closed chamber gas chromatography technique. Four treatments, aerated deficit (AI1), non-aerated (CK1), full (AI2) (CK2), performed. results showed that yield under each regime increased by 18.8% average compared non-aeration, difference was significant (P<0.05). Full significantly 23.9% comparison irrigation. Moreover, cumulative treatment autumn-winter season A slight seasons observed (P>0.05). There no between non-aeration spring-summer season, whereas enhanced season. Furthermore, over greatly Correlation analysis indicated temperature primary factor influencing fluxes. Soil temperature, moisture NO3− factors Irrigation coupled with particular practices may allow for a balance mitigation vegetable fields.

Язык: Английский

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Effect of organic and mineral N fertilizers on N2O emissions from an intensive vegetable rotation

Biology and Fertility of Soils, Год журнала: 2016, Номер 52(6), С. 895 - 908

Опубликована: Май 17, 2016

Язык: Английский

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Nitrous Oxide Fluxes, Soil Oxygen, and Denitrification Potential of Urine‐ and Non‐Urine‐Treated Soil under Different Irrigation Frequencies

Journal of Environmental Quality, Год журнала: 2016, Номер 45(4), С. 1169 - 1177

Опубликована: Май 31, 2016

Despite increased use of irrigation to improve forage quality and quantity for grazing cattle ( Linnaeus), there is a lack data that assess how practices influence nitrous oxide (NO) emissions from urine-affected soils. Irrigation effects on soil oxygen (O) availability, primary controller NO fluxes, poorly understood. It was hypothesized frequency would result in lower by increasing moisture decreasing O concentrations. This favor more reduction dinitrogen (N). We examined high (3-d) versus low (6-d) with without bovine urine addition pasture. Nitrous fluxes were measured daily 35 d. Soil O, temperature, water content continuously at multiple depths. Inorganic nitrogen, organic carbon, pH 6-d intervals. Measurements denitrification enzyme activity acetylene inhibition used infer the NO/(NO + N) ratio. The ratio under high- compared low-frequency irrigation, suggesting greater potential N frequent irrigation. Although addition, they not affected frequency. decreased temporarily after deposition, but dynamics did explain dynamics. Relative gas diffusivity (/) better predictor than concentration. On free-draining soil, while providing same total volume enhance ruminant patches grazed

Язык: Английский

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Significant effects of precipitation frequency on soil respiration and its components—A global synthesis

Global Change Biology, Год журнала: 2022, Номер 29(4), С. 1188 - 1205

Опубликована: Ноя. 21, 2022

Abstract Global warming intensifies the hydrological cycle, which results in changes precipitation regime (frequency and amount), will likely have significant impacts on soil respiration ( R s ). Although responses of to amount been extensively studied, there is little consensus how be affected by frequency (PF) across globe. Here, we synthesized field observations from 296 published papers quantify effects PF its components using meta‐analysis. Our indicated that decreased with an increase background mean annual precipitation. When data were grouped climate conditions, increased showed positive under arid condition but not semi‐humid or humid whereas suppressed all conditions. The mainly resulted response heterotrophic while negative attributed reductions root biomass respiration. Overall, our global synthesis provided for first time a comprehensive analysis divergent regions. This study also framework understanding modeling ecosystem carbon cycling change.

Язык: Английский

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Reducing nitrous oxide emissions and nitrogen leaching losses from irrigated arable cropping in Australia through optimized irrigation scheduling

Agricultural and Forest Meteorology, Год журнала: 2015, Номер 208, С. 32 - 39

Опубликована: Апрель 26, 2015

Язык: Английский

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Nitrous oxide emission and fertiliser nitrogen efficiency in a tropical sugarcane cropping system applied with different formulations of urea

Soil Research, Год журнала: 2016, Номер 54(5), С. 572 - 572

Опубликована: Янв. 1, 2016

Nitrous oxide (N2O) emissions from sugarcane cropped soils are usually high compared with those other arable lands. Nitrogen-efficient management strategies needed to mitigate N2O farming whilst maintaining productivity and profitability. A year-long field experiment was conducted in wet tropical Australia assess the efficacy of polymer-coated urea (PCU) nitrification inhibitor (3,4-dimethylpyrazole phosphate)-coated (NICU). Emissions were measured using manual automatic gas sampling chambers combination. The nitrogen (N) release PCU continued for >5–6 months, lower soil NO3– contents recorded for≥3 months NICU treatments conventional treatments. annual cumulative high, amounting 11.4–18.2kg N2O-Nha–1. In contrast findings most cropping systems, there no significant differences between different formulations application rates (0, 100 140kgNha–1). Daily variation at this site driven predominantly by rainfall. Urea did not significantly affect or sugar yield same N rate. Decreasing fertiliser rate recommended 140kgNha–1 100kgNha–1 led a decrease 1.3tha–1 2.2tha–1 treatments, respectively, but loss occurred treatment. Crop uptake also declined reduced urea, NICU. These results demonstrated that substituting may substantially normal causing deficiency crop. Further studies required investigate optimal integrated production, particularly choice products time rates, relation seasonal conditions.

Язык: Английский

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Reduced Snow Cover Increases Wintertime Nitrous Oxide (N2O) Emissions from an Agricultural Soil in the Upper U.S. Midwest

Ecosystems, Год журнала: 2016, Номер 20(5), С. 917 - 927

Опубликована: Ноя. 21, 2016

Throughout most of the northern hemisphere, snow cover decreased in almost every winter month from 1967 to 2012. Because is an effective insulator, loss has likely enhanced soil freezing and frequency freeze–thaw cycles, which can disrupt nitrogen dynamics including production nitrous oxide (N2O). We used replicated automated gas flux chambers deployed annual cropping system upper Midwest US for three winters (December–March, 2011–2013) examine effects removal additions on N2O fluxes. Diminished resulted increased emissions each year; over entire experiment, cumulative plots with removed were 69% higher than ambient control 95% that received additional (P < 0.001). Higher coincided a greater number cycles broke up macroaggregates (250–8000 µm) significantly inorganic pools. conclude less be expected accelerate fluxes agricultural soils subject wintertime freezing.

Язык: Английский

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