Evaluating the Nitrogen Fertilizer use Efficiency toward Reducing N2O Emission in Rice Production in the Red River Delta: A Case Study in Thuan Thanh, Bac Ninh

Date Received: 06-02-2025

Date Published: 20-02-2025

##submissions.doi##: https://doi.org/10.1234/865stg19

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Issue: Vol. 22 No. 8 (2024)

Section:

TÀI NGUYÊN VÀ MÔI TRƯỜNG

How to Cite:

Luyen, P. T. H., & Hoa, N. X. (2025). Evaluating the Nitrogen Fertilizer use Efficiency toward Reducing N2O Emission in Rice Production in the Red River Delta: A Case Study in Thuan Thanh, Bac Ninh. Vietnam Journal of Agricultural Sciences, 22(8). https://doi.org/10.1234/865stg19

Evaluating the Nitrogen Fertilizer use Efficiency toward Reducing N2O Emission in Rice Production in the Red River Delta: A Case Study in Thuan Thanh, Bac Ninh

Phan Thi Hai Luyen , Nguyen Xuan Hoa (*)

  • Tác giả liên hệ: nxhoa@vnua.edu.vn

    • Keywords

    nitrogen fertilizer use efficiency, reducing N2O emission, environmental protection

    Abstract


    The study aimed to evaluate the current status and factors affecting N use efficiency, thereby, proposing measures for improvement to reduce N2O emissions in rice production in the Red River Delta. The experiment was conducted on 30 farmers' production fields. In each field, one plot was designed without fertilization (control). Yield and amount of N absorbed in plants were analyzed to evaluate N use efficiency indicators. The results show that the current status of N recovery efficiency from fertilizers (ANR) and agronomic efficiency (AE) were low, 22.7 ± 5.5% and 15.94 ± 3.84kg grain/kg N, respectively. The factors that affect N use efficiency included N fertilizer level, rice variety, field size, and field elevation. At the current N fertilization level of 115kg N/ha, the amount of N2O emitted directly from fertilizer ứa recorded at 12.65kg N2O/ha, equivalent to 118,151kg N2O/year across the entire rice cultivation area of Thuan Thanh district. Research scenarios of reducing N fertilizer levels by 20-40% will correspondingly reduce 20-40% the amount of N2O emissions.

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