Impact Of Bacillus Amyloliquefaciens And Phosphorus In Rhizosphere On The Growth And P Uptake Of Maize

The paper studies the impact of low temperature, soil phosphorus and Bacillusamyloliquefaciens on growth and phosphorus absorption of maize through the indoorsimulation and field trials. The research content including phosphorus content effectsmycorrhizal infection in rhizosphere; different root architecture differences inphosphorus absorption and utilization; microbial inoculant affect plant growth andphosphorus absorption in maize seedling. The conclusions are as follows:1) In phosphorus deficiency conditions at room temperature, the increase ofphosphorus application will promote plant growth, increase aboveground biomass, butwhen the P application rate is to a certain extent, will inhibit root growth. While lowtemperature inhibited shoot and root growth, the impact of the plant on soilphosphorus absorption. But with the increase of phosphorus, plant growth will beimproving, and promote the accumulation of aboveground biomass, increaseabsorption of phosphorus. Under low temperature conditions, Bacillusamyloliquefaciens can promote the growth of plants, increase plant biomass andaccumulation of total phosphorus in plant. There are some positive effects betweenFZB42and phosphate.2) Under low P (0-100kg/ha) condition, maize promote plant absorption ofphosphorus, and reduce soil phosphorus deficiency in the growing period, bychanging the root structure and increasing the rate of mycorrhizal infection. Soil depth(0-20cm) is the major area of the root distribution, the root weight of two maizevarieties in the0-20cm are more than70%of the total root weight. The total root ofNongda108is heavier than that of NE15. With the increasing of the amount ofphosphorus, the mycorrhizal colonization reduced, the total of root climbs up and thendeclines.75-120kg/ha is the optimum P application range, within the scope of the interval, there is well-developed root system and higher mycorrhizal infection.3) The number of rhizosphere bacteria is higher than the number ofnon-rhizosphere bacterial. By microbial seed dressing, the number of rhizospherebacterial in the treatment of seed dressing is significantly higher than that withoutseed dressing treatment; dressing treatment can promote plant growth, increase thenumber of lateral roots and promote root development; seed dressing treatmentincreases phosphorus absorption of plant in some extent, increases plant biomass,promote shoot growth. After the seedling stage, the seed dressing deals with thenon-seed dressing treatment, the number of rhizosphere bacterial in the treatment ofseed dressing is little different from none-seed dressing treatment. The state of plantgrowth is closer, failing to show significant differences. The microbial action is nolonger evident.