Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8846693 | Applied Soil Ecology | 2018 | 6 Pages |
Abstract
Plant parasitic nematodes are the most devastating pest in continuous soybean monoculture, which have been managed mainly by chemical nematicides. However, safe and alternative methods need to be developed. A variety of organic materials are used for this purpose, but the control efï¬ciency of different organic materials for nematodes has not been assessed in a comparative manner. Therefore, based on a 7-year experiment of continuous soybean monoculture, we directly compared the effects of different organic materials (maize straw combined with chemical fertilizer (Fâ¯+â¯S), poplar leaf combined with chemical fertilizer (Fâ¯+â¯L), cow manure combined with chemical fertilizer (Fâ¯+â¯C) and only fertilizer as CK) on nematode trophic groups and functional guilds under the same condition. Despite the lack of total nematode density differences, organic materials altered the soil nematode community in a soybean monoculture system. The relative abundance of plant parasites was highest in Fâ¯+â¯L treatment, followed by Fâ¯+â¯S treatment, while lowest in Fâ¯+â¯C and CK treatments. Meanwhile, bacterivores and fungivores had a higher relative abundance in CK and Fâ¯+â¯C treatments and a lower relative abundance in Fâ¯+â¯L and Fâ¯+â¯S treatments. Furthermore, signiï¬cant treatment effects were also observed on the relative abundance of different functional guilds, except colonizer-persister (c-p) 5 plant parasites. The relative abundance of c-p 2 bacterivores was signiï¬cantly higher in CK and Fâ¯+â¯C treatments than in Fâ¯+â¯S and Fâ¯+â¯L treatments, while the relative abundance of c-p 3 omnivore-carnivores was signiï¬cantly higher in Fâ¯+â¯S and Fâ¯+â¯L treatments than in CK and Fâ¯+â¯C treatments. Organic materials treatments had a signiï¬cant effect on Shannon index (H'), plant parasite index (PPI), structure index (SI) and enrichment index (EI) (Pâ¯<â¯.05), and the signiï¬cant effects varied among different organic materials treatments. The results of this study suggest that the influence on the soil nematode community of organic materials is associated with their chemical composition, and so is its efficacy of controlling plant parasitic nematodes.
Keywords
Related Topics
Life Sciences
Agricultural and Biological Sciences
Ecology, Evolution, Behavior and Systematics
Authors
Jianming Li, Duchao Wang, Wei Fan, Ruicheng He, Yanying Yao, Ling Sun, Xinyu Zhao, Jinggui Wu,