Ammonia volatilization and nitrogen leaching following top-dressing of urea from water-saving irrigated rice field: impact of two-split surge irrigation

Xu, Junzeng; Liu, Boyi; Li, Ang; Liu, Wenhao; Li, Yawei; Dai, Yubin; Lü, Tao

doi:10.1007/s10333-018-0682-7

Cited by 11 publications

(6 citation statements)

References 25 publications

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“…It also agreed that a main pathway of applied-N loss in cropping systems is through NH 3 volatilisation (Zheng et al 2018). A study by Xu et al (2019) also revealed that the volatilisation rate is higher due to the urea application. Hence, an organic amendment is vital to herald the NH3 volatilisation from applied urea fertilizer.…”

Section: Introductionmentioning

confidence: 80%

Enriched rice straw biochar improves soil nitrogen availability and rice plant growth under waterlogged environment

Selvarajh,

Ch’ng,

Zain

et al. 2023

Bragantia

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Ammonia volatilisation causes major nitrogen losses from the soil and applied urea which results in low urea-N usage efficiency.Incubation experiment and pot experiment were conducted to assess the effect of enriched rice straw biochar on ammonia volatilisation, soil pH, exchangeable ammonium, available nitrate, and rice plant growth in comparison to the urea without additives under waterlogged conditions. During the incubation study, urea was amended with different rates of enriched rice straw biochar (5, 10, 15, and 20 t •ha -1 ). Urea amended with biochar at 5 to 10 t•ha -1 had successfully minimized ammonia loss compared to urea without biochar. Besides, application rate of 5 to 10 t•ha -1 of biochar also preserved more ammonium ions (65.37% and 66.54%, respectively), while at the same time, the retention of nitrate ions was 50.9% and 45.3% over urea without biochar. Similarly, 5 to 10 t•ha -1 of enriched rice straw biochar increased soil N level and improved rice plant growth significantly in pot experiment. Precisely, incorporation of enriched rice straw biochar at rate of 5 and 10 t•ha -1 offers wide variety benefits to soil amendments and rice plant nutrient uptake. Hence, the findings suggest that urea amended with enriched rice straw biochar altered the nutrients level in soil by improving rice plant growth.

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Section: Introductionmentioning

confidence: 80%

Enriched rice straw biochar improves soil nitrogen availability and rice plant growth under waterlogged environment

Selvarajh,

Ch’ng,

Zain

et al. 2023

Bragantia

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“…Controlled irrigation has been applied more frequently in rice fields in southern China. Studies have shown that it can effectively reduce ammonia volatilization and nitrogen leaching losses, lower the combined global warming potential of CH 4 and N 2 O, and contribute to an increase in rice yield [29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Substituting Partial Chemical Fertilizers with Bio-Organic Fertilizers to Reduce Greenhouse Gas Emissions in Water-Saving Irrigated Rice Fields

Han,

Hou,

Yao

et al. 2024

Agronomy

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Conventional water and fertilizer management practices have led to elevated greenhouse gas emissions from rice fields and decreased the efficiency of water and fertilizer utilization in agricultural land. The implementation of water-saving irrigation and the substitution of chemical fertilizers with organic alternatives can influence CH4 and N2O emissions in rice fields. However, it remains unclear how the simultaneous application of both methods will affect the CH4 and N2O emissions in rice fields. Therefore, two irrigation methods (F: flooded irrigation; C: controlled irrigation) and three fertilization modes (A: full chemical fertilizer; B: bio-organic fertilizer replacing 15% chemical nitrogen fertilizer; C: bio-organic fertilizer replacing 30% chemical nitrogen fertilizer) were set up through field experiments to explore the effect of greenhouse gas emission reduction in rice fields by combining controlled irrigation and bio-organic fertilizers. Substituting some chemical fertilizers with bio-organic fertilizers can lower the peak CH4 and N2O fluxes in rice fields, leading to a decrease in the cumulative CH4 and N2O emissions by 11.9~29.7% and 10.8~57.3%, respectively. The reductions led to a considerable decrease in the global warming potential (GWP) and the greenhouse gas emission intensity (GHGI) by 16.1~48.1% and 16.3~48.1%, respectively. Controlled irrigation significantly reduced CH4 emissions by 55.2~69.4% compared with flooded irrigation in rice fields. However, it also increased N2O emissions by 47.5~207.9%, considerably reducing their GWPs by 11.8~45.5%. Neither bio-organic fertilizer substitution nor controlled irrigation significantly affected rice yield. Replacing 15% of chemical nitrogen fertilizers with bio-organic fertilizers in controlled irrigation rice fields can minimize rice GWP and GHGI. The study’s results are of significant importance for enhancing the regulation of greenhouse gases in farmland and achieving sustainable agriculture through cleaner production.

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“…In controlled irrigation, frequent alternations of wet and dry soil accelerate the accumulation of NH 4 + -N into the soil. This promotes the nitrification process in soil and the NH 4 + -N content continues to decrease, which, in turn, reduces ammonia volatilization [26,27]. However, the alternations in soil dryness and wetness affect soil's microbial activity and nitrification-denitrification processes and can regulate soil aeration [28,29], ultimately leading to increased N 2 O emissions in rice fields [24,25].…”

Section: Introductionmentioning

confidence: 99%

Effects of Bio-Organic Fertilizers Substitution on Gaseous Nitrogen Losses in Rice Fields

Han,

Hou,

Yao

et al. 2024

Water

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Traditional practices for managing irrigation and fertilizer in Chinese rice fields have historically consumed large amounts of water resources and caused serious gaseous nitrogen losses (ammonia volatilization and N2O), resulting in low water and fertilizer use efficiency. While both water-saving irrigation and substituting organic fertilizer for chemical fertilizer can impact ammonia volatilization and N2O emissions, the impact of their combined application on gaseous nitrogen loss in rice fields remains unclear. To achieve this goal, we conducted a two-year experiment using two irrigation methods and three bio-organic fertilizer substitution modes. The experiment investigated the effect of different irrigation and fertilizer management techniques on gaseous nitrogen losses in rice fields. The result indicated that controlled irrigation could reduce the peak value of ammonia volatilization by 36.8~75.9% and ammonia volatilization accumulation by 45.8%. However, it also leads to a 71.4% increase in N2O accumulation emissions, resulting in a 43.0% reduction in gaseous nitrogen losses. Compared to full chemical fertilizers, bio-organic fertilizer substitution could effectively reduce the peak of N2O and ammonia volatilization. Cumulative ammonia volatilization and N2O emissions went down by 22.7~60.0% and 38.6~42.6%, respectively. This then led to a 23.4~52.9% drop in total gaseous nitrogen losses. In contrast, the utilization of controlled irrigation and bio-organic fertilizer substitution did not have a significant impact on rice yield. However, it did reduce the intensity of gaseous nitrogen loss from rice fields by 42.7% and 22.5% to 56.5%, respectively. When taken together, the substitution of bio-organic fertilizer in controlled irrigation can effectively reduce gaseous nitrogen losses while maintaining rice yields. This study has significant practical implications for reducing nitrogen loss from paddy fields, improving water and fertilizer utilization, and achieving sustainable agricultural development.

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Ammonia volatilization and nitrogen leaching following top-dressing of urea from water-saving irrigated rice field: impact of two-split surge irrigation

Cited by 11 publications

References 25 publications

Enriched rice straw biochar improves soil nitrogen availability and rice plant growth under waterlogged environment

Enriched rice straw biochar improves soil nitrogen availability and rice plant growth under waterlogged environment

Substituting Partial Chemical Fertilizers with Bio-Organic Fertilizers to Reduce Greenhouse Gas Emissions in Water-Saving Irrigated Rice Fields

Effects of Bio-Organic Fertilizers Substitution on Gaseous Nitrogen Losses in Rice Fields

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