1Institute of Plant Protection， Gansu Academy of Agricultural Sciences， Lanzhou 730070， Gansu， China； 2Qingyang
Academy of Agricultural Sciences， Qingyang 745000， Gansu， China；3Grassland College， Gansu Agricultural
University， Lanzhou 730070， Gansu， China
Abstract：Species of nematodes in onion（Allium cepae）rhizosphere and its population density
dynamics were studied in Jiayuguan city of Gansu Province．The results showed that 2 catalogues，4
families and 5 genera of plant-parasitic nematodes and 3 catalogues，5 families and 12 genera of nonplant
parasitic nematodes were seperated．The number of various kinds of nematodes was the least
at onion pre-transplant time，while its number at onion enlargement period reached the peak．The
dominant species of plant-parasitic nematodes in this region was Aphelenchus avenae，while the nonplant
nematode was Mesorhabditis spp．During various onion growing period，the population density
of non-plant-parasitic nematodes in onion rhizosphere in Jiayuguan city was higher than that of plantparasitic
ones．Wasilewska index value was 8.09，indicating the health index of onion planted soil in
Jiayuguan city was higher，and the soil health condition was fine.
漆永红, 秦一统, 孟 丽, 曹素芳, 杨发荣, 李敏权. 嘉峪关市洋葱根际土壤线虫种类与种群密度
动态变化规律[J]. 中国蔬菜, 2013, 1(20): 71-76.
QI Yong-Hong, QIN Yi-Tong, MENG Li, CAO Su-Fang, YANG Fa-Rong, LI Min-Quan. Species of Nematode in Onion Rhizosphere Soil and Their Population Density
Dynamic Variation Rule in Jiayuguan City. , 2013, 1(20): 71-76.
