Vertical distribution of soil nematode communities under different tillage systems in lower reaches of Liaohe River

被引:0
|
作者
Xuekun Hou
Ning Hu
Xiaoke Zhang
Lei Liang
Ruichang Zhai
机构
[1] Chinese Academy of Sciences,Liaoning Key Laboratory of Soil Environmental Quality and Agro
[2] Heilongjiang August First Reclamation University,product Safety, Institute of Applied Ecology
[3] Liaoning University,College of Plant Sciences and Technology
来源
Chinese Geographical Science | 2010年 / 20卷
关键词
soil nematode; tillage system; vertical distribution; tillage response;
D O I
暂无
中图分类号
学科分类号
摘要
Vertical distribution of soil nematode communities under conventional tillage (CT), no-tillage (NT) and fallow field (FF) treatments in the Lower Reaches of the Liaohe River was investigated at six soil depths (0–5 cm, 5–15 cm, 15–30 cm, 30–50 cm, 50–75 cm and 75–100 cm). The results show that total nematode abundance gradually decreases with depth, and the highest number of total nematodes is observed at 0–5 cm depth under NT and FF treatments. The number of fungivores and plant parasites is significantly higher under FF and NT treatments than under CT treatment at the 0–5 cm depth. There is significant soil depth effect on the abundances of bacterivores and omnivores-predators, which exhibits a similar trend to that of total nematodes; whereas, no significant tillage effect is found. Tillage effect on soil nematode communities can be reflected by values of relative tillage response of index V. Results of index V indicate that total nematodes, bacterivores, fungivores and plant parasites are mildly inhibited, and omnivores-predators is moderately inhibited under CT treatment; while, under FF treatment total nematodes is mildly, and fungivores and plant parasites are moderately stimulated, respectively.
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页码:106 / 111
页数:5
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