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Effect of Dendrocalamus latiflorus and Eucalyptus grandis plantations on soil nematode community in Sichuan Basin.

ZHU Ting-ting1,2, LI Wei1, LIU Cheng-gang1,2, PAN Kai-wen1**   

  1. (1ECORES Lab, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China; 2 University of Chinese Academy of Sciences, Beijing 100049, China)
  • Online:2014-04-10 Published:2014-04-10

Abstract: Soil nematode plays an important role in nutrient cycling and is often used as a good bioindicator of soil quality assessment. To understand the effect of implementing the Grain to Green Program on soil ecosystem health, we investigated the soil nematode communities from different soil depths (0-10, 10-20 and 20-40 cm) under three landuse types: 11-year-old Dendrocalamus latiflorus plantation (DL), 11-year-old Eucalyptus grandis plantation (EG), and the adjacent sloping cropland (CK) in a hilly area of the Chengdu plain, Sichuan Province, in April 2013. A total of 10103 nematodes were captured and fell into 2 classes, 6 orders, 22 families, and 37 genera. Aphelenchoides and Plectus were the dominant genera. Acrobeles, Cervidellus, Rhabditis were the common genera. There was a significant difference in the number of soil nematodes among different landuse types, and the vertical distribution of nematodes had an obvious surface aggregation phenomenon. The diversity index of soil nematodes, including Shannon index (H′), Margalef index (SR) and Pielou index (J′), followed the order of DL>CK>EG, except Simpson index (λ). Maturity index (MI) followed the order of DL>EG>CK, and plant parasites index (PPI) CK>DL>EG. Based on nematode faunal analysis, the structure of soil food web in DL was relatively mature and lessdisturbed, compared with EG and CK. The results suggest that DL can enrich species composition of soil nematode community, achieve higher diversity and then maintain a steadystate structure and function of soil ecosystem.

Key words: greenhouse, yield, cucumber, nitrogen fertilizer, quality