巨桉根系和根系土壤化感物质的研究

研究了以正己烷作溶剂，用超声浸提巨桉根系及其根系土壤，并用GC—MS检测其成分．用该法鉴定出根系含有烷烃、烯烃、芳香烃、醇、醛、酮、蒽醌、芳香酸酯、含N的萘杂环等9类29种有机成分；根系土壤含有烷烃、烯烃、芳香烃、醇、芳香酸酯、烯酸酯、内酯、氰等8类22种有机成分．证明了根系及其土壤中存在化感物质，表明了化感作用研究有一定的价值；根系和根系土壤中有17个相同化学成分，可推测土壤的这些化感成分可能来自巨桉的根系分泌物，但其作用机理有待进一步研究．

A Research on the Allelopathic Substances in Root System and Root System Soil of Eucalyptus Grandis

Root system and root system soil of Eucalyptus grandis have been ultrasonically extracted with hexane,and identified with gas chromatograph-mass spectrometer.The analysis results are as follows: root system contains 29 organic compounds of 9 different categories,including alkanes,alkenes,arenes,alcohols,aldehydes,ketones,anthraquinones,aromatic esters and naphthalene heterocycles;root system soil contains 22 components of 8 different categories,including alkanes,alkenes,arenes,alcohols,aromatic esters,alkenoic esters,lactones and cyanides.This exeperiment result proves that allelopathic substances exist in root system and its soil,so their allelopathy is worth studying.The research also indicates 17 same compounds exist both in root system and its soil,which may hint the compounds of root system soil come from root exudates of eucalyptus grandis,but the functioning mechanism should be further studied.