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Quantitative source apportionment of deep nitrate in a typical black soil critical zone: Vertical partitioning and legacy effects in Northeast China
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杨
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H
X
张
DOI：10.1016/j.agee.2025.109986.png)
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Abstract
En 中文
• Dual isotopes quantitatively decode stratification mechanisms of nitrate sources throughout a black soil critical zone. • Soil organic nitrogen dominant (53.5 %∼61.3 %) nitrate source across all depths. • Ammonium fertilizers exhibited depth-dependent contributions. • Atmospheric deposition contributed minimally (<4 %).
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