Objective

2

To investigate the effects of the inoculation of potassium-solubilizing bacteria on the rhizosphere soil microenvironment of

Paris polyphylla

var.

yunnanensis

.

Method

2

The effects of different potassium-solubilizing bacteria on the physical and chemical properties， microbial community structure， and soil enzyme activity in the rhizosphere soil of

P. polyphylla

var.

yunnanensis

were investigated by pot planting at room temperature. The correlation of various indexes was analyzed.

Result

2

The inoculation with different potassium-solubilizing bacteria could significantly affect the physical and chemical properties of rhizosphere soil of

P. polyphylla

var.

yunnanensis

. The mass fractions of available nitrogen， available phosphorus， and available potassium were 24.5-90.5 mg·kg

-1

， 2.53-25.9 mg·kg

-1

， and 132-312 mg·kg

-1

， respectively， and the soil pH was 7.08-7.75， which were in line with the optimal ranges of

P. polyphylla

var.

yunnanensis

planting. The inoculation of different potassium-solubilizing bacteria could affect the number of bacteria， actinomycetes， and fungi in rhizosphere soil to varying degrees. The transformation of soil from "fungal type" to "bacterial type" marks the improvement of soil fertility. It also affected the enzyme activity of rhizosphere soil， and the activities of neutral phosphatase， protease， and polyphenol oxidase showed an increasing trend. The correlation analysis showed that the number of bacteria was negatively correlated with the number of fungi （

r

=-0.856，

P

<

0.01）， positively correlated with the number of actinomycetes， the content of available nitrogen and available potassium， and negatively correlated with soil pH.

Conclusion

2

The inoculation of potassium-solubilizing bacteria can effectively improve the content of available potassium， available nitrogen， available phosphorus， and other nutrients in the rhizosphere soil of

P. polyphylla

var.

yunnanensis

， improve soil fertility， alleviate the continuous cropping obstacles of

P. polyphylla

var.

yunnanensis

， and lay a theoretical foundation for the green and sustainable development of

P. polyphylla

var.

yunnanensis

.