除草剂对不同土壤硝化作用的抑制效应

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中图分类号 S-3;S482.4 文献标志码A 文章编号 1007-7731（2026）07-0083-06

DOI号 10.16377/j.cnki.issn1007-7731.2026.07.021

Inhibitoryeffectsof herbicidesonnitrification indifferent soil

Ying Chaoran1，²Zou Yue1Ding Hong1Zheng Xiangzhou1 （ 1 Institute of Resources，Environment and Soil Fertilizer，Fujian Academyof Agricultural Sciences， Fuzhou 350013， China; ²Fujian Agriculture and Forestry University，Fuzhou 35oo02， China）

AbstractTo investigate the effectsof diferent herbicides onsoilnitrificationandtheresponses of different types of soil toherbicides，thisstudyselected2typesofsoil （calcareous loamanddryredsoil），3diffrent herbicides （acetochlor， fenoxaprop-P-ethyl，and 2，4 -D butyl ester），and conducted an indoor cultivation experiment. A control group （applying urea alone）and three aditional treatment groups （applying 10 mg/kg ofeach herbicide on the basis of thecontrol） weresetup.Theresults showed thatthere were significant differences inthe inhibitory effectsof three herbicides on the nitrification of two soils under the same application amount.For the calcareous fluvo-aquic soil， 2，4- D butylesterandfenoxaprop-P-ethyl slightly inhibited soil nitrficationactivity，whileacetochlorshowednoobvious effect. In the upland red soil， 2，4 -Dbutyl ester significantly inhibits nitrification （ P <0.05）， followed by fenoxaprop-Pethyl，and acetochlor still had no obvious effect. In summary， 2，4 -Dbutyl ester inhibits the nitrification of these two soil types to varying degrees，butthe inhibitory efect weakens with the prolongation of the incubation time.Its inhibitory effct on the nitrificationofuplandredsoilcanlastforabout38days，whilethatonthecalcareous fluvo-aquicsoil lasts for3-9 days.Theapplicationof2，4-Dbutylesterherbicidehas thedual efectsof weed controlandreducing soil nitrificationrate，whichcanefectivelyinhibittheconversionofammoniumnitrogentonitratenitrogeninthesoil， therebyreducing nitrogen lossand environmentalpollution causedby processes such as nitrate nitrogen leaching and denitrification.Theresearchprovidesareferenceforregulatingsoilnitrificationand improving nitrogen fertilizerutilization efficiency.

Keywordsherbicides;soiltypes;nitrification;inhibitoryeffect

氮素是植物生长发育所必需的营养元素，长期大量施用氮肥会引起土壤微生物群落结构失衡、土壤质量下降等一系列问题[-2]。（剩余8111字）