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Dec.  2014
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HE Ming-zhu, XIA Ti-yuan, LI Li-chi, DA Liang-jun. Research on the effects of weed nitrogen and phosphorus enrichment in natural approximating ecological agro-ditches of Dianchi Lake basin[J]. Journal of East China Normal University (Natural Sciences), 2012, (4): 157-163.
Citation: HE Ming-zhu, XIA Ti-yuan, LI Li-chi, DA Liang-jun. Research on the effects of weed nitrogen and phosphorus enrichment in natural approximating ecological agro-ditches of Dianchi Lake basin[J]. Journal of East China Normal University (Natural Sciences), 2012, (4): 157-163.

Research on the effects of weed nitrogen and phosphorus enrichment in natural approximating ecological agro-ditches of Dianchi Lake basin

  • Received Date: 2011-06-01
  • Rev Recd Date: 2011-09-01
  • Publish Date: 2012-07-25
  • This paper quantified the weed and species removal effect of NP respectively, and definite the yearly absorption and removal effect of NP in farmland soil and runoff by weed in the natural approximating ecological agro-ditches in Dianchi Lake basin, to provide the evidence of water eutrophication comprehensive treatment in agro-diffused pollution by cutting NP effectively and source control. The result proved: ① There is a great difference of NP enrichment among different weeds, in the same or different species of different periods; ② the main phenomenon of NP enrichment of natural approximating weed plant is N limitation (N〖DK〗∶P14); ③ there is positive relationship between NP nutrient absorption and the weed biomass in natural approximating ecological agro-ditch of farmland, and the whole year total amount of NP in the basin were N (37.869.9) kg/hm2, P (271.19) kg/ha, which were much lower than the maximum of N 113.16 kg/ha, P 10.14 kg/hm2.
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