Abstract:

To explore comprehensive control of soil erosion after the conversion of cropland to forest in hilly areas of the middle Sichuan basin, a single factor experiment with random block design was conducted in an artificial fruit-grass ecosystem to study the influence of different soil management ways on the physical and chemical properties of soil, microbial quantities in soil, and enzyme activities of soil. The reaults showed that the effect of mowing and covering management way on the water conservation, heat preservation, and drop in temperature of soil were better than that of other management ways.Soil density was least and all the chemical nutrient values were highest in the treatment of returning the livestock's feces to the orchard. Microorganism quantity and enzyme activity of soil in all four treatments were significantly different, which was best in the treatment of returning the livestock's feces to the orchard and had a significant correlation with soil nutrient contents.Therefore microorganism quantity and enzyme activity of soil could also be used as an evaluation index of soil fertility. In all treatments, mowing and covering and returning the livestock's feces to the orchard had the best ecological benefits.

Key words: artificial fruit-grass ecosystem, soil managements, soil fertility, microorganism, enzyme activity