Study On Soil Nutrients And Enzyme Activities In Six Wild Chinese Herbal Medicines Habitat On Mt.taibai, Qinling Mountains

Six Chinese herbal medicines in different habitats on Mt.Taibai, Qinling Mountainsincluding Pyrola decorata, Cephalotaxus fortunei, Polygonatum Odoratum, Potentilla glabra,Polygonum viviparum and Potentilla fruticosa as the research object, the researchcomparatively observed soil chemical properties and enzyme activities in the profile and inthe rhizosphere and non-rhizosphere among different Chinese herbal medicines，and made ananalysis and evaluation of soil chemical properties and enzyme activities in the rhizosphereand non-rhizosphere，get the following conclusion:1. Under the same profile in0⁵0cm soil layer, soil organic matter, total nitrogen,available nitrogen, phosphorus and potassium content, CEC, urease, invertase, catalase, acidphosphatase activity were shown in a trend of reduction with the increase of soil depth.Among them, soil organic matter were obviously cumulative in the soil surface; Soil totalpotassium remained stable in the whole soil mass, and it was scarcely changed amongdifferent soil layers in the whole sampling area （content between1.281².104%）. Thevariation of soil phosphorus was not obvious (total phosphorus content between0.004⁰.191%, available phosphorus content between2.595²2.181mg·kg^-1). Soil availablephosphorus reduced with the increase of soil depth in all sample areas except in thePolygonatum Odoratum sample characterized in an opposite trend.2. Under different profiles in0⁵0cm soil layer, soil organic matter, total nitrogen,available nitrogen, phosphorus potassium content, CEC, urease, invertase, catalase and acidphosphatase activity were shown in a trend of rise with the increase of elevation，while soilpH performed conversely. Soil total potassium and available potassium content were in a stateof inconformity, soil total potassium content were smaller in different Chinese herbalmedicines, while available potassium were larger. Soil profile in the sample of Pyroladecorata, Cephalotaxus fortunei and Polygonatum Odoratum were base saturated soil，whilein Potentilla glabra, Polygonum viviparum and Potentilla fruticosa it showed baseunsaturated soil.3. Soil organic matter, total nitrogen, available nitrogen, available phosphorus and CECcontent in the rhizosphere of six Chinese herbal medicines were higher than those in the non-rhizosphere, presenting obvious rhizosphere aggregation, and soil enzyme activities alsooverall showed strong characteristics in the rhizosphere.4. In the rhizosphere of six Chinese herbal medicines, soil organic matter, total nitrogen,total phosphorus and neutral phosphatase activity showed a significant positive correlation;soil CEC and neutral phosphatase showed a highly extremely significant positive correlation,and were also significantly correlated with acid phosphatase. In the non-rhizosphere of sixChinese herbal medicines, soil organic matter and total nitrogen were also very significantlycorrelated with urease, catalase and neutral phosphatase activity; soil CEC and urease,catalase, neutral phosphatase and acid phosphatase were significantly positive correlation.5. Soil fertility comprehensive score performed higher in the rhizosphere than in thenon-rhizosphere. Soil fertility comprehensive score in the rhizosphere and non-rhizosphere ofPotentilla fruticosa, Polygonum viviparum and Potentilla glabra were higher, while in Pyroladecorata, Polygonatum Odoratum and Cephalotaxus fortunei it performed lower. Soil organicmatter and CEC played an important role in evaluating soil fertility in the rhizosphere andnon-rhizosphere of six Chinese herbal medicines, and neutral phosphatase was an optionalsoil enzyme indicator.