丁香酸对不同类型土壤硝化作用与N_(2)O排放的影响和因子分析  

Influences and Factor Analysis of Syringic Acid on Nitrification and N_(2)O Emission in Different Soil Types

作　　者：王方嘉 陆玉芳[1] 华瑶 施卫明[1,2] WANG Fangjia;LU Yufang;HUA Yao;SHI Weiming(State Key Laboratory of Soil and Sustainable Agriculture,Institute of Soil Science,Chinese Academy of Sciences,Nanjing 211135,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]土壤与农业可持续发展全国重点实验室(中国科学院南京土壤研究所),南京211135 [2]中国科学院大学,北京100049

出　　处：《土壤》2025年第1期9-16,共8页Soils

基　　金：国家重点研发计划项目(2022YFD1700604);国家自然科学基金面上项目(32072670)资助。

摘　　要：通过室内培养试验,研究不同用量生物硝化抑制剂丁香酸对3种典型农田土壤(潮土、水稻土和黄壤)硝化速率与N_(2)O排放的影响及其主要因子。结果表明,丁香酸对中性水稻土和酸性黄壤的硝化作用和N_(2)O排放具有抑制效果,对两种土壤硝化速率的抑制率分别为20%~55%和11%~60%,对N_(2)O排放量的抑制率分别为55%~65%和13%~24%。但是,丁香酸对碱性潮土硝化速率与N_(2)O排放均无显著影响。丁香酸在黄壤上对土壤硝化作用的抑制具有剂量效应,但对N_(2)O的减排作用无剂量效应。双因素方差分析结果表明土壤类型与用量决定丁香酸的硝化抑制效能,且二者具有交互作用,但丁香酸用量对土壤N_(2)O的减排作用无显著性影响。相关性热图分析进一步表明,土壤pH、有机质与黏粒含量是影响丁香酸对土壤硝化抑制与N_(2)O减排作用的关键因子。本研究认为偏酸性和有机质及黏粒含量较高的土壤条件更有利于丁香酸硝化抑制与N_(2)O减排效能的发挥,这为生物硝化抑制剂的精准应用提供了理论依据。In order to investigate the effects of syringic acid(SA),a biological nitrification inhibitor(BNI),on soil nitrification and nitrous oxide(N_(2)O)emissions in different soils,three typical agricultural soilsnamely calcareous soil,paddy soil,and yellow soil,were selected for incubation experiments.The effects of different SA concentrations on nitrification rate and N_(2)O production in the three soils were studied,and the main factors regulating the effect of SA were explored.The results showed that SA had inhibitory effects on soil nitrification and N_(2)O emissions in neutral paddy soil and acidic yellow soil,with inhibition rates of 20%to 55%and 11%to 60%on soil nitrification rate,and inhibition rates of 55%to 65%and 13%to 24%on soil N_(2)O emissions,respectively.On alkaline soil,SA had no significant effect on soil nitrification rate and N_(2)O emissions.The inhibition of soil nitrification by SA on yellow soil had a dose effect,while such a dose effect was not found on the reduction of N_(2)O emissions.Two factor analysis of variance showed that both soil type and SA concentration affected nitrification inhibition efficiency of SA,and they had an interactive effect,but the latter had no significant impact on emission reduction of soil N_(2)O.The correlation heatmap analysis further indicated that soil pH,organic matter and clay content may be key factors affecting soil nitrification inhibition and N_(2)O emission reduction of SA.In conclusion,soil conditions with slightly acidity,high organic matter and clay content are more conducive to the effectiveness of SA,which provides a theoretical basis for the precise application of BNIs.

关 键 词：生物硝化抑制剂 丁香酸 硝化作用 N_(2)O 影响因子 

分 类 号：S143.16[农业科学—肥料学]