Effect of synergistic urea by nitrification inhibitor coated with resin on wheat growth and soil nitrogen supply

Ge, Yu; Yu, Li; Dong, Yilin; He, Mingrong; Dai, Xinglong

doi:10.1016/j.pedsph.2023.06.012

Cited by 1 publication

(3 citation statements)

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“…In comparison with conventional urea, DCRU significantly decreased the GWP. The decrease in GWP under CRU and DCRU was mainly due to the reduced N 2 O emissions, which was in accordance with previous studies [ 16 , 18 , 27 ]. Therefore, the reasonable application of DCRU may be an important measure for slowing down GHG emissions from vegetable systems in the future.…”

Section: Discussionsupporting

confidence: 92%

“…Ahmed et al [ 3 ] reported that urea applied with 1.5% DCD decreased the CO 2 and N 2 O emissions in soil by 22–172% and up to 94-fold, respectively, compared with those under conventional N fertilizer application. However, the performance and stability of DCD and the transformation of dissolved urea released from CRU vary with soil properties such as soil temperature, pH, and water content [ 26 , 27 ]. Fan et al [ 19 ] confirmed that the CRU amended with 3,4-dimethylpyrazole phosphate (DMPP) could reduce the GHG emissions of open-field vegetables, and that the mitigation effect was made more significant by combining CRU with DMPP.…”

Section: Introductionmentioning

confidence: 99%

“…Fan et al [ 19 ] confirmed that the CRU amended with 3,4-dimethylpyrazole phosphate (DMPP) could reduce the GHG emissions of open-field vegetables, and that the mitigation effect was made more significant by combining CRU with DMPP. Ge et al [ 27 ] confirmed that the application of CRU and DCD led to significant improvement in wheat yield and NUE, the effect of which was more pronounced under the synergistic use of resin-coated urea and NI.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Long-Term Controlled-Release Urea on Soil Greenhouse Gas Emissions in an Open-Field Lettuce System

Wang,

Cao,

Zhou

et al. 2024

Plants

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Controlled-release urea (CRU) fertilizers are widely used in agricultural production to reduce conventional nitrogen (N) fertilization-induced agricultural greenhouse gas emissions (GHGs) and improve N use efficiency (NUE). However, the long-term effects of different CRU fertilizers on GHGs and crop yields in vegetable fields remain relatively unexplored. This study investigated the variations in GHG emissions at four growth stages of lettuce in the spring and autumn seasons based on a five-year field experiment in the North China Plain. Four treatments were setup: CK (without N application), U (conventional urea—N application), ON (20% reduction in urea—N application), CRU (20% reduction in polyurethane-coated urea without topdressing), and DCRU (20% reduction in polyurethane-coated urea containing dicyandiamide [DCD] without topdressing). The results show that N application treatments significantly increased the GHG emissions and the lettuce yield and net yield, and DCRU exhibited the lowest N2O and CO2 emissions, the highest lettuce yield and net yield, and the highest lettuce N content of the N application treatments. When compared to U, the N2O emission peak under CRU and DCRU treatments was notably decreased and delayed, and their average N2O emission fluxes were significantly reduced by 10.20–20.72% and 17.51–29.35%, respectively, leading to a significant reduction in mean cumulative N2O emissions during the 2017–2021 period. When compared to U, the CO2 fluxes of DCRU significantly decreased by 8.0–16.54% in the seedling period, and mean cumulative CO2 emission decreased by 9.28%. Moreover, compared to U, the global warming potential (GWP) and greenhouse gas intensity (GHGI) of the DCRU treatment was significantly alleviated by 9.02–17.13% and 16.68–20.36%, respectively. Compared to U, the N content of lettuce under DCRU was significantly increased by 6.48–17.25%, and the lettuce net yield was also significantly increased by 5.41–7.71%. These observations indicated that the simple and efficient N management strategy to strike a balance between enhancing lettuce yields and reduce GHG emissions in open-field lettuce fields could be obtained by applying controlled-release urea containing DCD without topdressing.

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Section: Discussionsupporting

confidence: 92%