匈牙利黄瓜集约化单作模式下土壤线虫种群的案例研究
A case study of soil nematode populations under intensive cucumber monoculture in Hungary.
作者信息
Petrikovszki R, Gódor A, Nagy P I, Selmeczi D, Simon B, Tóth F
机构信息
Department of Zoology and Ecology, Institute for Wildlife Management and Nature Conservation, Hungarian University of Agriculture and Life Sciences, H-2100, Páter Károly u. 1., Gödöllő, Hungary.
Research Institute of Organic Agriculture, H-1033, Miklós tér 1., Budapest, Hungary.
出版信息
Helminthologia. 2024 Dec 12;61(3):272-276. doi: 10.2478/helm-2024-0026. eCollection 2024 Sep.
A 25-year-old intensive monoculture of cucumber ( 'Monolit F1') has been chosen for monitoring the effect of continuous fertilization, drip irrigation and various soil disinfection on free-living nematodes in soil. Densities, relative abundance of nematode genera, trophic groups and c-p classes, in addition, numerous nematological indices were determined besides certain soil properties. Concerning the nematological indices, all the values proved a stressed, depleted and unstable environment with degraded food web condition. The exaggerated application of fertilizers through irrigation caused high salinity values (0.62 %) which is much higher than the indicated toxicity threshold (0.4 %) for cultivated plants. The number of individuals of the bacterivore and genera, which have a very high stress tolerance, was outstanding in the area. Besides juveniles, the appearance of males was also recorded which could lead to a change in the genetic composition of the population to adapt to environmental stressors. All these changes may result from salt stress indicated by intensive drip irrigation and the use of artificial fertilizers.
选取了一块25年连作的黄瓜地（‘Monolit F1’），用于监测连续施肥、滴灌以及各种土壤消毒措施对土壤中自由生活线虫的影响。测定了线虫密度、线虫属的相对丰度、营养类群和c-p类，此外，除了某些土壤性质外，还测定了许多线虫学指标。关于线虫学指标，所有数值都表明该环境处于胁迫、贫瘠且不稳定状态，食物网状况退化。通过灌溉过度施肥导致土壤盐度值较高（0.62%），远高于栽培植物的毒性阈值（0.4%）。该区域内具有很高胁迫耐受性的食细菌线虫属和其他线虫属的个体数量显著。除了幼虫外，还记录到了雄虫的出现，这可能导致种群遗传组成发生变化以适应环境压力源。所有这些变化可能是由密集滴灌和使用人工肥料所导致的盐胁迫引起的。
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