DU Hui,QI Yong-hong,ZHANG Guang-rong,et al.Study on the Population Dynamics and Vertical Distribution of the Protected Field Cowpea Root-knot Nematode in Gansu Province[J].Northern Horticulture,2013,37(20):115-117.
甘肃保护地豇豆根结线虫在土壤中的消长动态及垂直分布研究
- Title:
- Study on the Population Dynamics and Vertical Distribution of the Protected Field Cowpea Root-knot Nematode in Gansu Province
- 文章编号:
- 1001-0009(2013)20-0115-03
- Keywords:
- root-knot; population dynamics; vertical distribution; Gansu province
- 分类号:
- S 436.43
- 文献标志码:
- B
- 摘要:
- 通过室内线虫分离结合田间病情观察，对甘肃保护地豇豆根结线虫在土壤中的消长动态及垂直分布进行了研究。结果表明：甘肃保护地豇豆从3月初种植到7月底拉秧，根结线虫可发生4代，5月上旬线虫完成第1代，历时约35 d，6月初完成第2代，历时约30 d；6月底完成第3代，历时约20 d；7月下旬完成第4代，历时约20 d；各代历期因季节温度不同而不同，随着气温变高（或变低），线虫完成1代的时间缩短（或延长），条件适宜（土温为25~30℃）时，3周左右就可完成1代。不同深度土壤中的根结线虫数量随作物生长的不同阶段（季节）有所变化，但其主要分布在0~20 cm的土层中。
- Abstract:
- The population dynamics and vertical distribution of root-knot nematodes in the protected field were studied through nematode isolated and field investigation in Gansu province.The results showed that the nematode could complete four generations during cowpea growing season.The first generation，the second generation，the third generation and the fourth generation were completed in early May，early June，late June and in late July，which lasted about 35 d，30 d，20 d and 20 d，respectively.The time which nematode completed one generation was shortened or prolonged along with the soil temperature changing，it was about three weeks when temperature in the soil reached 25～30℃.The numbers of nematode at different soil layer changed at different growing stage (season) of plant，but the greatest population densities of the nematodes mainly occurred in 0～20 cm layer of the soil below the surface.
参考文献/References:
[1]杜蕙,漆永红,吕和平.甘肃省保护地蔬菜根结线虫病的发生特点及原因分析[J].甘肃农业科技,2010(6):34-36. [2]杜蕙,漆永红,申培增,等.种植诱集植物对土壤中根结线虫种群数量的影响[J].中国蔬菜,2011(20):84-87.
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备注/Memo
第一作者简介：杜蕙（1970-），女，甘肃临洮人，硕士，副研究员，现主要从事农作物病害及其防治技术研究工作。E-mail:dh0928@163.com.