Regulation of Several Fertilizers on Continuous Cropping Obstacle of Polygonum capitatum
In order to screen the fertilizers with better control effects on continuous cropping obstacle of P.capitatum,the influence of several fertilizers,including Armes bio-fertilizer,Dibao bio-fertilizer,RW transformation promoter and fertilizer for P.capitatum,on plant growth,yield,nutrients and soil microbes of P.capitatum in continuous cropping soil were studied.Results:The yield of continuous cropped P.capitatum was low,merely 247 kg/667m2,soil microbes followed the sequence of actinomycetes > bacteria > fungi.Compared with non-fertilizer treatment,fertilizer application increased the 1st and 2nd tiller number of P.capitatum by 62.5 %-125 % and 41.18 %-123.53 % respectively.Yield,gross elements content in root,stem and leaf increased by 55.87 %-418.62 %,0.97 %-16.39 %,6.33 %-23.14 % and 3.59 %-34.85 % separately.Nonetheless,the gross elements content in the flower decreased by 0.78 %-5.69 %;Contents of quercetin and gallic acid were above 0.38 % and 0.51% respectively.The moisture content was below 12 % with little difference;Soil microbes bacteria > actinomycetes > fungi.Base fertilizer RW transformation promoter 300 kg/667m2 and fertilizer for P.capitatum 44.47 kg/667m2 + topdressing fertilizer for P.capitatum 11.12 kg/667m2 had the best control effects,followed by fertilizer for P.capitatum 44.47 kg/667m2 + topdressing fertilizer for P.capitatum 11.12 kg/667m2.