Abstract: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.