Biodiv Sci ›› 2022, Vol. 30 ›› Issue (12): 22222.  DOI: 10.17520/biods.2022222

Special Issue: 土壤生物与土壤健康

• Original Papers • Previous Articles     Next Articles

Seasonal variation in cropland soil nematode community composition in the lower reaches of Liaohe Plain

Xiaotong Liu1,2, Yijia Tian1,2, Hanwen Liu1,2, Cuiying Liang1, Siwei Jiang1, Wenju Liang1,3, Xiaoke Zhang1,3,*()   

  1. 1. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016
    2. University of Chinese Academy of Sciences, Beijing 100049
    3. Key Lab of Conservation Tillage & Ecological Agriculture, Liaoning Province, Shenyang 110016
  • Received:2022-04-25 Accepted:2022-07-06 Online:2022-12-20 Published:2022-09-21
  • Contact: *E-mail:


Aim: The managements in farmland in lower reaches of Liaohe Plain, such as long-term cultivation, fertilizer and agrochemicals application on cropland have led to soil degradation, environmental pollution and the decline of productivity, which inevitably have an impact on soil biological health. Therefore, we investigated the seasonal variations of soil nematode community composition to explore the effects of field artificial management measures on the abundance and diversity of soil nematode community.
Methods: Soils from cropland and abandoned cropland (as controls) were collected in the National Field Observation and Research Station of Shenyang Agroecosystems in the spring (May), summer (July), autumn (September) and winter (November) of 2019. Soil nematodes were identified and the corresponding ecological indices were analyzed.
Results: The results showed that the total abundance of soil nematodes was significantly higher in abandoned cropland than that in cropland soils, but no significant differences were observed among four seasons. Seasonal variation mainly influenced the abundance of soil free-living nematode individuals, with the highest abundance occurring in September. Seasonal variation also significantly affected the number of soil nematode genera, which was the lowest in November (non-growing season). Compared to the abandoned cropland, farmland management significantly reduced the abundance of soil nematodes including omnivores-predators and fungivores.
Conclusions: In cropland, the soil food web was relatively stable, whereas abandoned cropland was more susceptible to seasonal variations, and its soil food web was moderately disturbed.

Key words: seasonal variation, cropland, abandoned cropland, soil nematode diversity, community composition, trophic group