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Scientia Silvae Sinicae ›› 2022, Vol. 58 ›› Issue (2): 80-88.doi: 10.11707/j.1001-7488.20220209

• Research papers • Previous Articles     Next Articles

Nematodes Community Structure in Red Soil of Cunninghamia lanceolata Plantations with Different Ages in Subtropical China

Yingfeng Zheng1,2,Jianqing Wang1,2,*,Bingzhang Zou3,Sirong Wang3,Xiuzhen Shi1,2,Zaipeng Yu1,2,Zhiqun Huang1,2   

  1. 1. School of Geographical Science, Fujian Normal University Fuzhou 350007
    2. Key Laboratory for Humid Subtropical Eco-Geographical Processes of the Ministry of Education, Fujian Normal University Fuzhou 350007
    3. Baisha National Forest Farm of Fujian Province Shanghang 364205
  • Received:2020-10-11 Online:2022-02-25 Published:2022-04-26
  • Contact: Jianqing Wang


Objective: This study aimed to investigate the changes of soil nematode community structure in Cunninghamia lanceolata plantations with different forest ages in subtropical region, so as to provide a theoretical basis for the sustainable management of C. lanceolata plantation. Method: C. lanceolata plantations at five different forest ages (5, 8, 21, 27, 40 a) were selected as research object using a space-for-time substitution approach. Soil nematodes were isolated and extracted using the platter method. The species and genera of soil nematodes were identified, and the density of total nematodes, the relative abundances of various nutritional nematode groups were determined simultaneously. The Shannon diversity (H′), the maturity indexes of plant parasities (PPI) and the Wasilewska index (WI) were calculated as well. The changes of soil nematode community structure in C. lanceolata plantations with different ages were analyzed by non-metric multidimensional scale (NMDS). Result: 1) A total of 9 872 nematodes, were isolated, belonging to 68 genera, and the dominant genus was different at the different stand ages of C. lanceolata. The genus, Meloidogyne, was predominant in all forest stands except for the young stage of C. lanceolate. 2) The total density and diversity of soil nematodes did not change significantly in the all stand developmental stages. There were differences in community structure of soil nematodes between 40-year-old stand and 5-year-old and 8-year-old stands, indicating that the development of C. lanceolata plantation had changed the structure of soil nematode community. The relative abundance of plant parasitic nematodes was the highest, followed by omnivores-predators and bacterivores, and the relative abundance of fungivores was the lowest. The relative abundance of plant parasites decreased first and then increased, reaching the lowest in 8 years. The relative abundance of fungivores was the highest in 5 years, and decreased with the increment of the stand age of C. lanceolata. The development of C. lanceolata plantation had changed the relative abundance of plant parasities as well as the density of fungivores. However, there was no significant difference in the relative abundance and density of bacterivores or omnivores-predators with the development of C. lanceolate. 3) The maturity indexes of plant parasites decreased first, reaching the lowest in 21 years, and then increased with the development of C. lanceolata. The Wasilewska indexes in 5-year-old stand were significantly higher than those in 40-year-old stand. The WI value showed a decreasing trend with the development of stand ages. The correlation analysis showed that the Wasilewska index was positively correlated with soil pH, and the density and relative abundance of parasitic nematodes were positively correlated with the soil total carbon and carbon phosphorus ratio, respectively. Conclusion: In subtropical Chinese fir plantation, plant parasitic nematodes occupy a dominant position in quantity. The long-term plantation of C. lanceolata has changed the soil nematode community structure, especially triggering a dominant role of the plant parasites, which could probably result in adverse effects on soil health and plant growth. More attention should be paid to the study of soil nematode community structure and underlying mechanisms for the sustainable management of C. lanceolata plantations in subtropical China.

Key words: plantation, nematode, soil food web, soil health, red soil

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