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Space instead of time in the Huajiang degraded karst area to select bare, herbaceous community, shrub, arbor four recovery phase as vegetation restoration succession series. Determination of physical and chemical properties of the four stages, each stage of the soil surface, gully, shicao three niche invertase, urease, amylase, catalase, phosphatase, polyphenol oxidase activity, soil respiration in spring, summer, autumn, winter four seasons and diurnal variation of measured variation analysis revealed that soil enzymes and soil respiration. Soil fertility quality evaluation system for the recovery phase, the area of ??each soil quality evaluation. The main results are as follows: 1 soil physical and chemical properties of each index change. Moisture, soil capacity, bulk density, organic matter, total nitrogen, total phosphorus, total potassium in vegetation recovery in the value of the size of the overall performance: nude Soil respiration characteristics. Vegetation restoration in soil respiration characteristics of bare land stage spring> autumn> winter; niche soil breathing characteristics, the first two recovery phase Banshigou higher than the other two niche, shrubs and communities change their habitat to a variety of enzyme activity behave differently; characteristics of the diurnal variation of soil respiration, soil respiration diurnal variation overall showed a single peak curve, peak at 12:00 and 14:00, the lowest value mainly from 8:00 am to 10:00 pm; relationship between soil respiration and temperature, humidity, soil respiration and temperature in different recovery stage different herb community and shrub higher (for R 2 = 0.876,0.9164) the bare Qiaolin poor (respectively R 2 = 0.7048,0.733); woodland and forest and soil good correlation of humidity (non-forest land: R ~ 2 = 0.924, forest: R ~ 2 = 0.7329). 4 evaluation of fertility quality. Principal component analysis, choose organic matter, total nitrogen, total phosphorus, total potassium, nitrogen, available phosphorus, potassium, water content, soil capacity, bulk density, sucrose, starch enzyme, urease, catalase, alkaline phosphatase, polyphenol oxidase, soil respiration as soil quality evaluation evaluation results show that the bare, herbaceous community, shrub, Qiaolin fertility index (IFI), respectively: 0.005,0.282,0.718,0.994 . Indicated that the soil quality with Vegetation Succession improved.
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