Comparison of Antioxidant Enzyme Activity of Pioneer Plants in Karst Areas of the Northwest Guangxi

The selection of pioneer species is one of the key technologies for ecological restoration in Karst Rocky desertification areas. The purpose of this study is to explore the relationship between antioxidant enzyme activities of different pioneer plants in Karst Rocky desertification areas and their living conditions, environmental adaptability and other ecological factors, so as to screen out excellent species with good ecological and economic benefits and provide a theoretical basis for ecological restoration in Karst Rocky desertification areas. In this study, the pioneer plant samples were collected from the karst area of the Northwest Guangxi and their SOD, POD, CAT, GSH, APX and other antioxidant enzymes activities were determined and compared. Our results showed that the antioxidant enzyme activities of different plants were significantly various due to the influence of themselves and various external factors. The plant species with high antioxidant enzyme activities often had better soil ecological restoration effect. The activity of antioxidant enzymes in pioneer plants was closely related to soil organic matter, soil enzyme activity and other physical and chemical indexes. Antioxidant enzyme activity of plants in Karst regions may be a critical indicator for species selection for ecological restoration of Karst Rocky desertification.