HAN Xin-hua,XU Yan-li,PAN Feng-juan,et al.ommunity Structure of Soil Nematodes in Soybean Fields under Different Rotation Systems[J].Soybean Science,2008,27(01):118-123.[doi:10.11861/j.issn.1000-9841.2008.01.0118]
黑土区轮作系统大豆田土壤线虫种群结构研究
- Title:
- ommunity Structure of Soil Nematodes in Soybean Fields under Different Rotation Systems
- Keywords:
- Soil nematode; Soybean; Rotation system; Community structure
- 文献标志码:
- A
- 摘要:
- 线虫是土壤动物中最丰富的组成成分,可以通过取食植物组织和微生物进行养分再循环和促进矿物质分解,为植物根系更好的吸收提供养分。本文主要针对中国科学院海伦农业生态实验站长期定位实验区不同轮作系统大豆田土壤线虫进行研究,以期了解轮作系统大豆田线虫分布特征及种群结构动态变化,为进一步从生态角度揭示轮作系统下土地利用状况提供材料。取样茬口分别为大豆连作(CS,15a)、麦豆麦豆迎茬(WSWS,15a)和麦米豆轮作(WMS,15a)。大豆田共鉴定出8目19科43属线虫。线虫种类分布茬口间存在差异,有29属线虫是各茬口所共有的,其余的14种线虫各茬口分布不同,这与取样茬口和土壤环境等因素有关。在取样时期内,随着生育期的推进,大豆连作田土壤线虫总数呈现先高后低的趋势,轮作和迎茬田都呈逐渐升高的趋势。茎属Ditylenchus、拟丽突属Acrobeloides、中杆属Mesorhabditis、原杆属Protorhabditis、盆咽属Panagrolaimus、丝尾垫刃属Filenchus和具脊垫刃属Coslenchus线虫分布受到茬口影响,达到显著差异水平。
- Abstract:
- Soil nematodes are numerous,species-rich and widely distribute,which play essential roles in soil organic matter decomposition,plant nutrient mineralization and nutrient circulation.More and more scholars pay attention to the important function of soil nematodes in agroecosystem.The study was conducted in the soybean field under continuous cropping (CS,15a),wheat-soybean-wheat-soybean (WSWS,15a) and wheat-maize-soybean (WMS,15a) rotation systems in Hailun Agricultural Ecology Experimental Station so as to elucidate the character of nematode distribution and dynamic change of nematode community.Totally 8 order,19 family and 43 genera nematodes were identified in soybean field and 29 genera nematodes were shared by each treatments,other 14 genera were different among samples in that their distribution were affected by the crops stubbles and soil environment.Total number of soil nematodes was exhibited low to high to low trend in CS and continous higher in WSWS and WMS at the sample stages.The number of Ditylenchus,Acrobeloides,Mesorhabditis,Protorhabditis,Panagrolaimus,Filenchus and Coslenchus was different among soybean rotation systems.
参考文献/References:
[1]Bongers T.1990.The maturity index:an ecological measure of environmental disturbance based on nematode species composition.Oecologia,83:14-19
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备注/Memo
基金项目:中国科学院知识创新工程重要方向项目(kzcx2-yw-408)