Rhizosphere and nonrhizosphere soils were sampled from corn field at harvest time.Total number and genus of the bacteria mineralizing lecithin or dissolving phosphate were measured.It was found that the number of eith...Rhizosphere and nonrhizosphere soils were sampled from corn field at harvest time.Total number and genus of the bacteria mineralizing lecithin or dissolving phosphate were measured.It was found that the number of either organic or inorganic phosphobacteria in the rhizosphere soil was 10 to 20 times higher than those in the nonrhizosphere soil.The community structure was much more complicated in the rhizosphere than in the nonrhizosphere.Pseudomonas and Flavobacteria were advantageous orgainc phosphobacteria in the rhizosphere, but Erwinia for inorganinc phosphobacteria.In nonrhizosphere, most of organic phosphobacteria were Bacillus. However, no advantageous genus of inorganic phosphobacteria were found in the nonrhizosphere soil.展开更多
Sun Yanxin,Yao Jun,Xing Lijun,Zhang Youshan(Institute of Plant Nutrition & Resources,Beijing Academy of Agriculture and Forest Sciences,Beijing 100081).A Bacillus mucilaginosus RGBc13 was incubated together with e...Sun Yanxin,Yao Jun,Xing Lijun,Zhang Youshan(Institute of Plant Nutrition & Resources,Beijing Academy of Agriculture and Forest Sciences,Beijing 100081).A Bacillus mucilaginosus RGBc13 was incubated together with either a Pseudomonas sp.RGP11,a B.megaterinm RGPi or an Azotobacter chrococcus RGN21.It was found that RGBc13 had a strong ability to release K from glass powder and was not significantly affected by other bacteria although its growth was restrained.With the existence of RGN21,RGBc13 showed a stronger capacity to dissolve K from glass powder.RGBc13 promoted RGP11 growth,but restrained RGN21.RGPi growth was not affected by RGBc13.展开更多
文摘Rhizosphere and nonrhizosphere soils were sampled from corn field at harvest time.Total number and genus of the bacteria mineralizing lecithin or dissolving phosphate were measured.It was found that the number of either organic or inorganic phosphobacteria in the rhizosphere soil was 10 to 20 times higher than those in the nonrhizosphere soil.The community structure was much more complicated in the rhizosphere than in the nonrhizosphere.Pseudomonas and Flavobacteria were advantageous orgainc phosphobacteria in the rhizosphere, but Erwinia for inorganinc phosphobacteria.In nonrhizosphere, most of organic phosphobacteria were Bacillus. However, no advantageous genus of inorganic phosphobacteria were found in the nonrhizosphere soil.
文摘Sun Yanxin,Yao Jun,Xing Lijun,Zhang Youshan(Institute of Plant Nutrition & Resources,Beijing Academy of Agriculture and Forest Sciences,Beijing 100081).A Bacillus mucilaginosus RGBc13 was incubated together with either a Pseudomonas sp.RGP11,a B.megaterinm RGPi or an Azotobacter chrococcus RGN21.It was found that RGBc13 had a strong ability to release K from glass powder and was not significantly affected by other bacteria although its growth was restrained.With the existence of RGN21,RGBc13 showed a stronger capacity to dissolve K from glass powder.RGBc13 promoted RGP11 growth,but restrained RGN21.RGPi growth was not affected by RGBc13.
