更新了来自中国大米田的活性损失的损失因子和高分辨率空间变化
Yiwei Shang1, Yulong Yin2, Hao Ying2
1College of Resources and Environmental Sciences, National Academy of Agriculture Green Development, Key Laboratory of Plant-Soil Interactions, Ministry of Education, Key Laboratory of Low-carbon Green Agriculture, Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing, 100193, China; Department of Agroecology, Aarhus University, 8830, Tjele, Denmark.
Journal of environmental management
|April 13, 2024
概括
田的反应性气损失是一个重大的环境问题. 这项研究量化了合成肥料和背景土壤来源的损失,确定了针对性减缓策略的热点.
科学领域:
- 环境科学 环境科学
- 农业科学 农业科学
- 生物地质化学生物地质化学
背景情况:
- 人为反应性 (Nr) 损失是一个关键的环境问题.
- 由于数据的局限性,在精细的尺度上估计来自大米田的Nr损失及其空间模式是具有挑战性的.
- 了解Nr损失对于制定有效的环境缓解策略至关重要.
研究的目的:
- 估计来自合成肥料的背景Nr损失 (BNL) 和损失因子 (LFs) 在田中的五条路径.
- 为了确定国家1x1公里的空间变化,Nr损失.
- 为决策者提供Nr损失减缓优先事项的见解.
主要方法:
- 利用数据驱动模型与多源数据相结合.
- 员工建立了用于估计的机器学习模型.
- 分析了五种Nr损失途径:NH3,N2O,NO,N浸,和流水.
主要成果:
- 平均23.4%的合成N肥料丢失到环境中.
- 中国大米田的总Nr损失估计在2021年为1.92 ± 0.52 Tg N yr-1.
- 由合成肥料引起的Nr损失占总量的69%,其中BNL占31%.
结论:
- Nr损失的热点集中在长江中部和下部地区.
- 这项研究提高了Nr损失估计的准确性,并确定了缓解的关键领域.
- 调查结果为决策者提供了最新的见解,以优先考虑减少Nr损失的战略.
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