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Chinese Journal of Applied Ecology ›› 1998, Vol. 9 ›› Issue (4): 419-424.

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Effect of soil nematode exclusion on wheat growth and its N and P uptake

Hu Feng, Li Huixin, Wu Xinqi, Wu Shanmei   

  1. College of Natural Resources and Environmental Science, Nanjing Agricultural University, Nanjing 210095
  • Received:1998-03-02 Revised:1998-04-01 Online:1998-07-25 Published:1998-07-25

Abstract: The soil used for pot experiment was treated by a nematocide (phenamiphos, 67mg·kg-1 dry soil) or dry heating at 105℃ for 2h before wheat (Triticum aestivum) planting to study the effect of these two treatments on wheat growth and its Nand Puptake.Approximately 80% of the nematodes in soil were eliminated by nematocide and 100% by dry heating.Significantly lower wheat biomass was found in nematocide treatment than in control from seedling to heading stage.The same was true for plant Ncontent from jointing to ripening stage, Nuptake in whole growing season, and Puptake from heading to ripening stage.In dry heating treatment, wheat biomass, Ncontent and Nand Puptake were also markedly lower than control from heading to ripening stage.The aboveground biomass and its Nand Puptake had a similar tendency with those of whole plant for the two treatments.However, nematode exclusion had little effect on plant Pcontent.The inhibitory effect of nematode exclusion on wheat growth and its nutrient uptake was suggested to be associated with the reduce of Nmineralization and of plant growth promoting substance derived from soil microbial activities.

Key words: Nematode exclusion, wheat growth, N and P uptake, fuel, drying coefficient, moisture content, wind speed