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| Effects of Ganoderma lingzhi Continuous Cropping on Soil Physicochemical Properties and Nematode Community |
| LU Mengzhao1，2，LIU Mei2，3，CHEN Guang2**，WANG Xuefeng2，3** |
| Effects of Ganoderma lingzhi Continuous Cropping on Soil Physicochemical Properties and Nematode Community |
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Abstract Soil nematodes are an important part of soil animal community, and changes in their com?
munity structure can effectively indicate soil environment and health status. In the present study, the
relationship between composition of nematode communities and environmental factors at different
soil depths were studied based on Ganoderma lingzhi cultivation soil samples of different continuous
cropping years (first year, 2 years and 3 years of cultivation) collected from the Ganoderma lingzhi
planting base in Huangsongdian. The results revealed that the content of organic matter (OM), avail?
able phosphorus (AP), available potassium (AK) and ammonia nitrogen (AN) and soil pH were signifi?
cantly reduced. A total of 21 genera of nematodes were identified in continuous cropping soil. Bacte?
riophagous nematode group and fungus-eating nematode group are both dominant nutrient groups in
continuous cropping soil, up to 1 580 (per 100 g of soil) in the topsoil cultivated for 2 years and 640
(per 100 g of soil) in the topsoil cultivated for 3 years. The abundance of nematodes in the soil for
2 years of cultivation was significantly higher than that in the first year and 3 years (P<0.05) and it
was significantly higher in the topsoil than that in the middle and bottom soils (P<0.05), up to 2 686
(per 100 g of soil) in the topsoil. Shannon-Weiner diversity index (H′), species richness (SR), nema?
tode chanel ratio (NCR) and nematode maturity index (MI) decreased, dominance index (λ) and
fungus-bacteria-eating nematode ratio (F/B) increased with the increase of continuous planting years.
The numbers of Aphelenchoides, Protorhabditis and Prodorylaimus were significantly positively corre?
lated with soil pH, available phosphorus (AP) and ammonia nitrogen (AN) contents (P<0.05).
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Received: 07 November 2021
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