不同溶磷菌生物有机肥对玉米苗生长和土壤磷养分的影响

采用盆栽试验,研究5种不同溶磷菌生物有机肥对玉米苗生长的促生作用和养分吸收的影响。结果表明,与单施有机肥相比,5个溶磷菌生物有机肥处理不仅显著提高土壤有效磷含量,而且还可显著促进玉米苗的生长,株高、叶长、叶宽和干重分别增加5.1%~33.8%、14.0%~38.0%、17.7%~37.6%和31.7%~177.1%。玉米植株磷、氮和钾的吸收累积量分别比对照增加41.6%~366.6%、4.3%~143.7%和40.3%~226.3%。在供试的5种溶磷细菌生物有机肥中,以唐菖蒲伯克霍尔德菌(Burkholderia gladioli)P1的效果最佳,乙酸钙不动杆菌(Acinetobacter calcoaceticus)P3次之,而巨大芽孢杆菌(Bacillus megaterium)P4和P5效果较差。这5种溶磷菌在土壤中定殖的总趋势是先下降再上升最后逐渐下降,定殖效果最好的是P4和P5处理。

Effects of Different Phosphate Solubilizing Bacteria Bio-fertilizers on Growth of Maize Seedling and Available Phosphorus Concentration in Soil

A pot experiment was conducted to evaluate five different phosphate solubilizing bacteria bio-fertilizers on growth promotion and nutrient uptake of maize seedling.The results obtained were as follows:the five phosphate solubilizing bacteria bio-fertilizers could significantly increase the content of available phosphorus concentration in soil and promote growth of maize seedling as compared to organic fertilizer applied only.Besides,shoot height of maize seedling increased by 5.1%～33.8%,leaf length by 14.0%～38.0%,leaf width by 17.7%～37.6% and dry weight by 31.7%～177.1%.Phosphorus,nitrogen and potassium accumulation in maize plant increased by 41.6%～366.6%,4.3%～143.7% and by 40.3%～226.3%,respectively.The most effective treatment was Burkholderia gladioli P1,the second was Acinetobacter calcoaceticus P3,and the last were Bacillus megaterium P4 and P5.The general colonization trend of the five phosphate solubilizing bacteria in the soil was that it declined at first,then raised,finally decreased slowly.And the effective treatment of colonization was Bacillus megaterium P4 and P5.