title: Effects of long-term continuous cropping on soil nematode community and soil condition associated with replant problem in strawberry habitat.
abstract: Continuous cropping changes soil physiochemical parameters, enzymes and microorganism communities, causing "replant problem" in strawberry cultivation. We hypothesized that soil nematode community would reflect the changes in soil conditions caused by long-term continuous cropping, in ways that are consistent and predictable. To test this hypothesis, we studied the soil nematode communities and several soil parameters, including the concentration of soil phenolic acids, organic matter and nitrogen levels, in strawberry greenhouse under continuous-cropping for five different durations. Soil pH significantly decreased, and four phenolic acids, i.e., p-hydroxybenzoic acid, ferulic acid, cinnamic acid and p-coumaric acid, accumulated with time under continuous cropping. The four phenolic acids were highly toxic to Acrobeloides spp., the eudominant genus in non-continuous cropping, causing it to reduce to a resident genus after seven-years of continuous cropping. Decreased nematode diversity indicated loss of ecosystem stability and sustainability because of continuous-cropping practice. Moreover, the dominant decomposition pathway was altered from bacterial to fungal under continuous cropping. Our results suggest that along with the continuous-cropping time in strawberry habitat, the soil food web is disturbed, and the available plant nutrition as well as the general health of the soil deteriorates; these changes can be indicated by soil nematode community.
authors: Department of Entomology, China Agricultural University, Beijing 100193, China.|Institute of Plant Protection, Sichuan Academy of Agricultural Science, Chengdu 610066, China.
authors: Xingyue
authors: X
authors: Li
authors: Department of Entomology &Nematology, University of California-Davis, Davis, CA 95616, Untied States.
authors: Edwin E
authors: EE
authors: Lewis
authors: Department of Entomology, China Agricultural University, Beijing 100193, China.
authors: Qizhi
authors: Q
authors: Liu
authors: Department of Entomology, China Agricultural University, Beijing 100193, China.
authors: Heqin
authors: H
authors: Li
authors: Department of Entomology, China Agricultural University, Beijing 100193, China.
authors: Chunqi
authors: C
authors: Bai
authors: Institute of Pomology and Forestry, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100093, China.
authors: Yuzhu
authors: Y
authors: Wang
mesh_terms: D000383:Agriculture / Q000379:methods*; D000818:Animals; D044822:Biodiversity; D017753:Ecosystem; D031985:Fragaria / Q000254:growth & development*; D006863:Hydrogen-Ion Concentration; D062385:Hydroxybenzoates / Q000633:toxicity; D009348:Nematoda / Q000502:physiology*; D012987:Soil / Q000469:parasitology*; D013997:Time Factors
chemical_list: D062385:Hydroxybenzoates; D012987:Soil; C017616:phenolic acid