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<p>Reducing N<sub>2</sub>O emissions dominated by denitrification from strongly acidic tea plantation soils has become vital for tea plantation soil ecosystems, therefore, the aim of the present study was to evaluate the effect of the procyanidins (Biological denitrification inhibitor) on the soil properties and N<sub>2</sub>O emissions in the tea plantation soils. A 21-day microcosm experiment was designed to explore the effects of procyanidins on tea plantation soil properties and N<sub>2</sub>O emissions. Three treatments (soil without N fertilizer or procyanidins amendment treatment (CK), nitrogen fertilizer amendment treatment (N) and nitrogen fertilizer plus procyanidins amendment treatment (NI)) were sets in this study. Procyanidins amendment significantly reduced N<sub>2</sub>O emissions by approximately 88% from the fertilizer-derived N<sub>2</sub>O emissions in tea plantation soils. N<sub>2</sub>O emissions were related to soil organic carbon (SOC), NH<sub>4</sub><sup>+</sup> content, microbial biomass carbon (MBC), and denitrification related genes. The SOC and C/N ratio would attribute to the decrease of N<sub>2</sub>O emissions in the tea plantation soil following procyanidins amendment. In addition, procyanidins can inhibit N<sub>2</sub>O emissions from the tea plantation soils by decreasing <i>nirS</i>-/<i>nirK</i>-denitrifiers and increasing <i>nosZ</i>-denitrifiers. Procyanidins is more active for soil N<sub>2</sub>O reduction in the strongly acidic soils, and its amendment is an adaptive choice for sustainable tea plantation.</p>

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Procyanidins-Mediated Biological Denitrification Inhibition Reduces Fertilizer-Induced N2O Emissions in Acidic Tea Plantation Soils

  • 期刊论文

  • 发表日期：

    2025年1月20日

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  • Xing Han,
  • Haiyang Yu,
  • Miaoling Meng,
  • Chaorong Ge,
  • Ningguo Zheng,
  • Huaiying Yao

摘要

Reducing N2O emissions dominated by denitrification from strongly acidic tea plantation soils has become vital for tea plantation soil ecosystems, therefore, the aim of the present study was to evaluate the effect of the procyanidins (Biological denitrification inhibitor) on the soil properties and N2O emissions in the tea plantation soils. A 21-day microcosm experiment was designed to explore the effects of procyanidins on tea plantation soil properties and N2O emissions. Three treatments (soil without N fertilizer or procyanidins amendment treatment (CK), nitrogen fertilizer amendment treatment (N) and nitrogen fertilizer plus procyanidins amendment treatment (NI)) were sets in this study. Procyanidins amendment significantly reduced N2O emissions by approximately 88% from the fertilizer-derived N2O emissions in tea plantation soils. N2O emissions were related to soil organic carbon (SOC), NH4+ content, microbial biomass carbon (MBC), and denitrification related genes. The SOC and C/N ratio would attribute to the decrease of N2O emissions in the tea plantation soil following procyanidins amendment. In addition, procyanidins can inhibit N2O emissions from the tea plantation soils by decreasing nirS-/nirK-denitrifiers and increasing nosZ-denitrifiers. Procyanidins is more active for soil N2O reduction in the strongly acidic soils, and its amendment is an adaptive choice for sustainable tea plantation.