Abstract: Taking seven types of slopes in the disturbed area of Xiangjiaba construction as test objects, this paper measured their soil pH, and evaluated their soil fertility with standard integrated grade method. The soil at vegetation-growing concrete gunning (VGCG) was weakly alkaline, while the others were acidic at different degree. The soil pH value was decreased in the sequence of VGCG (7.68±0.04)> discarded residue (DR) (6.96±0.02)> framed beams with soil cover (FBSC)(6.93±0.16)> external soil with spray seeding (ESS)(6.75±0.35)> thick layer substrate (TLS)(6.67±0.36)> natural secondary forest (NSF)(5.68±1.25)> natural forest (NF)(4.71±0.23); while the integrated index of soil fertility was in the order of VGCG (3.06±0.02)< TLS(4.06±0.78)< NSF(4.52±0.16)< FBSC(4.62±0.06)< NF(4.62±0.06)< ESS(4.90±0.01)< DR(5.00±0.10). It proved that some artificial additives such as cement, compound fertilizer, and humus had definite positive effects in adjusting soil pH and maintaining soil fertility, being helpful to provide favorable soil condition for plant growth.

Key words: soil pH, soil fertility, standard integrated grade method,  slope, Xiangjiaba hydropower construction, orchard, grass, soil fertility, sustainable development