To study the soil ecological effects of different restoration models in the karst gorge of the Karst Plateau

six typical ecological restoration models were selected as the research objects to analyze the soil physical-chemical properties

anti-erosion characteristics

infiltration properties

and the relationship between soil nutrients and the above-mentioned properties

taking an abandoned grassland as the control. Field survey

sample collection

and lab analysis were carried out. The results indicated that: (1) Compared with the abandoned grassland

the restoration models significantly improved soil physical properties such as bulk density

and total porosity

as well as anti-scouribility coefficient and anti-erodibility index (p < 0.05). Total porosity and non-capillary porosity was increased by 2.62% and 6.45% by different restoration models

respectively. Soil compactness and bulk density was decreased by 19.95% and 3.98%

respectively. The mean value of anti-scouribility coefficient of different restoration models was 1.79 times of that of the abandoned grassland

the average dry soil loss was only 45.42% of that of the abandoned grassland

and the average value of anti-erodibility index was 27.53% higher than that of the abandoned grassland. (2) Infiltration experiments showed that the average initial infiltration rate (2 min)

stable infiltration rate

average infiltration rate

and total infiltration of the six restoration models was 1.6

1.0

1.2

and 1.3 times of that of the abandoned grassland

respectively. Comprehensive evaluation model of soil permeability based on principal component analysis (Z = 0.9689 × F1) showed that the average soil permeability score of the restoration models (0.1860) was higher than that of the abandoned grassland (-1.115 8)

indicating that the permeability of the ecological restoration models was stronger than that of the abandoned grassland. (3) Correlation analysis showed that there was a highly significant correlation (p < 0.01) between available nitrogen

available phosphorus

available potassium

organic matter and total infiltration

the anti-scouribility coefficient

anti-erodibility index

respectively. Soil anti-erosion characteristics and infiltration ability had important effects on soil nutrients. In conclusion

compared with the abandoned grassland

the restoration models significantly improved soil physical properties

anti-erosion characteristics

and infiltration properties

which had a great connection with the occurrence and loss of soil nutrient.