Lü Y, Xue W F, Yan P P
China Certification & Inspection Group LiaoNing Co.Ltd., Dalian116039, Liaoning, China.
Technique Center of Dalian Customs, Dallian, 116000, Liaoning, China.
Helminthologia. 2022 Dec 17;59(3):301-310. doi: 10.2478/helm-2022-0031. eCollection 2022 Sep.
The application of biocides may create unintended consequences on soil biota and ecosystem stability. The inputs of organic matter can increase biocides adsorption and reduction of non-target organisms influence. A field experiment was conducted to study the changes of soil abiotic and nematode communities resulting from biocides application in non-litter-added and litter-added soils in forest. Our results showed that litter addition could change the responses of soil nematodes to biocides. The influence of fungicide was evident mainly in litter-added plots in which it increased nematode abundance. Insecticide and its interaction with fungicide significantly decreased the diversity index and the abundance of omnivores-predators and herbivores in non-litter-added plots. While, insecticide had little effect on nematode diversity and abundance in litter-added plots. Litter addition may help to maintain the structure and stability of soil food web and result in bacteria dominant decomposition pathway. Our results suggest that litter addition may be a critical factor for maintaining soil ecosystem stability when biocides are applied in forest.
杀生剂的应用可能会对土壤生物群和生态系统稳定性产生意想不到的后果。有机物的输入可以增加杀生剂的吸附，并减少对非目标生物的影响。进行了一项田间试验，以研究在森林中未添加凋落物和添加凋落物的土壤中施用杀生剂后土壤非生物和线虫群落的变化。我们的结果表明，添加凋落物可以改变土壤线虫对杀生剂的反应。杀菌剂的影响主要在添加凋落物的地块中明显，在这些地块中它增加了线虫的丰度。杀虫剂及其与杀菌剂的相互作用显著降低了未添加凋落物地块中的多样性指数以及杂食性捕食者和草食性动物的丰度。而在添加凋落物的地块中，杀虫剂对线虫多样性和丰度影响很小。添加凋落物可能有助于维持土壤食物网的结构和稳定性，并导致以细菌为主导的分解途径。我们的结果表明，当在森林中施用杀生剂时，添加凋落物可能是维持土壤生态系统稳定性的关键因素。
