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Chinese Agricultural Science Bulletin ›› 2023, Vol. 39 ›› Issue (15): 118-126.doi: 10.11924/j.issn.1000-6850.casb2022-0486

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Soil Nematode Communities in Apple Orchards in Shaanxi Province: Distribution Characteristics Analysis Based on High-throughput Sequencing

TIAN Jia1(), LI Fei1, SUN Chao1, SHANGGUAN Yiqing2,3, QI Fan2,3()   

  1. 1 Shaanxi Institute of Microbiology, Xi’an 710043
    2 Shaanxi Academy of Sciences, Xi’an 710043
    3 Chinese Academy of Sciences Xi’an Branch, Xi’an 710043
  • Received:2022-06-15 Revised:2022-08-15 Online:2023-05-25 Published:2023-05-22

Abstract:

The aim is to elucidate the distribution characteristics of soil nematodes in apple orchards in Shaanxi Province. This study analyzed the composition of soil nematode communities by high-throughput sequencing, using total soil DNA from 179 orchards in three industrial belts. The results show that there are two classes, 12 orders, and 93 genera of soil nematodes in the apple orchards in Shaanxi Province, of which Hexamermis is the dominant genus, accounting for 92.20%, 89.73%, and 88.63% in the mountainous region in northern Shaanxi, northern Weibei and southern Weibei industrial belt, respectively. The ACE and Shannon indexes of nematodes are significantly affected by different industrial belts (latitudes) and altitudes (P<0.05). The cluster analysis shows that the distribution of nematodes in the northern Weibei industrial belt is more similar to that in the southern Weibei industrial belt at the genus level. Soil moisture content, organic matter, total nitrogen, total phosphorus, and pH are significantly correlated with soil nematode diversity indexes and dominant genera, such as Hexamermis and Paratylenchus (P<0.05). This study reveals that soil nematodes are abundant in the apple orchards in Shaanxi Province, but the dominant genera are fewer. In addition to latitude and altitude, improving soil properties can play a crucial role in optimizing the nematode community structure, and subsequently the soil environment in the apple orchards.

Key words: soil nematode, distribution characteristic, high-throughput sequencing, apple orchard, Loess Plateau