Effects of Different Phosphorus-solubilizing Flora on Phosphorus Forms and Rape Yield in Reclaimed Soil

doi:10.7668/hbnxb.2017.06.033

Abstract

Abstract: To cultivate the reclaimed soil and improve the availability of potential phosphorus in soil, we set a pot experiment to study the effects of different concentrations of single and mixed phosphate-solubilizing flora on phosphorus morphology and rape yield, phosphorus uptake and chlorophyll content in reclaimed soil. The results showed that the application of different concentrations of phosphate-solubilizing bacteria could improve the available phosphorus, alkaline phosphatase activity and soil total phosphorus content, and the best effect was phosphate-solubilizing bacteria. Soil available phosphorus content, alkaline phosphatase activity and soil total phosphorus content were all significantly higher than those no treatment of phosphate-solubilizing bacteria treatment, by 21.69%-50.42%, 7.17%-25.45%, 2.38%-9.52% respectively, and reached the maximum under the concentration of 4 mL/pot. The application of phosphate-solubilizing bacteria could improve the yield and chlorophyll content of rape, and the effect of phosphate-solubilizing bacteria was the most significant, which improved 4.13%-41.76% and 3.60%-17.90% than those no treatment of phosphate bacteria treatment, respectively. The yield and chlorophyll content of rapeseed were the highest under the medium concentration of 4 mL/pot, the phosphorus content of rape did not show significant difference. The effects of different phosphate-solubilizing treatments on Hedley inorganic phosphorus morphological contents were also affected. The contents of H₂O-Pi, NaHCO₃-Pi and NaOH-Pi in soil treated with different phosphate-solubilizing bacteria were higher than those in CK, and residual-P and HCl-Pi were lower than those of CK. The most significant effect was the medium concentration of 4 mL/pot phosphate bacteria treatment. The contents of H₂O-Pi, NaHCO₃-Pi and NaOH-Pi in soil treated with phosphate-solubilizing bacteria were higher than those without phosphate-solubilizing bacteria. Application of phosphate-solubilizing bacteria could increase the contents of H₂O-Pi, NaHCO₃-Pi and NaOH-Pi in soil and reduce the content of residual-P and HCl-Pi. The results of comprehensive analysis showed that the treatment of phosphate-solubilizing bacteria could promote the activation of soil phosphorus and increase the available phosphorus content in the soil, and could significantly improve the chlorophyll content and yield of the crop. The results will provide the rational application of phosphate fertilizer in the reclaimed soil theoretical basis.

Key words: Phosphate-solubilizing bacteria, Soil available phosphorus, Soil phosphorus form, Alkaline phosphatase activity

CLC Number:

LIU Lingli, WEI Ying, LIU Yang, HONG Jianping. Effects of Different Phosphorus-solubilizing Flora on Phosphorus Forms and Rape Yield in Reclaimed Soil[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2017, 32(6): 229-234. doi: 10.7668/hbnxb.2017.06.033.

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