摘要
大豆根围土壤线虫种类丰富,有些为重要的植物病原线虫,其中胞囊属线虫(Heterodera spp.),螺旋(Helicoty-lenchus spp.)、盘旋(Rotylenchus spp.)、拟盘旋线虫(Pararotylenchus spp.)及真滑刃(Aphelenchus spp.)等植物线虫在大豆田分布普遍,对大豆的生长发育产生一定的影响。利用贝漫浅盘法收集不同轮作体系下0~20cm、20cm^50cm、50cm^80cm大豆根围土壤线虫,研究不同深度大豆根围重要线虫分布情况,以从线虫生态角度评价土壤健康状况并探讨大豆合理轮作体系。结果表明,大豆各轮作体系土壤总体线虫、胞囊线虫、螺旋-盘旋-拟盘旋线虫及真滑刃线虫密度都随土壤深度的增加而降低,0~20cm和20 cm^50cm,米豆和麦豆迎茬大豆根围胞囊线虫密度较大,轮作胞囊线虫密度大于连作,各轮作体系间土壤总线虫和真滑刃线虫数量在3个土层差异不显著,休闲区螺旋-盘旋-拟盘旋线虫为优势种群。
There are enormous soil nematodes in soybean rhizospbere, and many of them are important plant parasitic nematodes. Heterodera spp., Helicotylenchus spp., Rotylenchus spp., Pararotylenchus spp. and Aphelenchus spp., which may affect the growth of soybean, extensively distribute in soybean fields. Aiming to assess the health of soil and discuss better soybean rotation system, the vertical distribution of important plant parasitic nematodes in different soybean rotation systems was investigated. Nematodes from three soil depths （0 - 20cm, 20 cm - 50cm and 50 cm - 80cm） were extracted by Baermann plates. The results showed that the numbers of total soil nematode, Heterodera spp., Helicotylenchus spp. - Rotylenchus spp. - Pararotylenchus spp. and Aphelenchus spp. declined with increasing of soil depth. At 0 - 20cm and 20 cm - 50cm soil depths, the number of Heterodera spp. in maize - soybean and wheat - soybean fields was higher than other soybean rotation systems, and that of cropping rotation was higher than that of continuous cropping. There were no significant difference of the number of total nematode and Aphelenchus spp. at three soil depths in different soybean rotation systems. Helicotylenchus spp. - Rotylenchus spp. - Pararotylenchus spp. were dominant in fallow.
出处
《农业系统科学与综合研究》
CSCD
2009年第1期33-38,共6页
System Sciemces and Comprehensive Studies In Agriculture
基金
中国科学院知识创新工程重要方向项目(KZCX2-YW-408)
关键词
大豆
根围
植物线虫
垂直分布
soybean
rhizosphere
plant parasitic nematode
vertical distribution
