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【Objective】This paper aims to select turf grass cultivars suitable for vegetation restoration in Guizhou mercury mine wasteland and mercury pollution environment.【Method】Four turfgrass cultivars suiting southern China, including Motor, Feast, Pernille, and Legend, were selected as the experimental materials. The seed germination test and soil culture test under different concentration of Hg2+ stress were conducted to explore the seed germination and seedling growth of four cultivars.【Result】With Hg2+concentration increasing, the germination rate,germination potential,germination index and vigor index of the four cultivars were obviously inhibited. The tolerance limit of Feast and Motor was 120 mg/L; In the range of experimental treatment, the seed germination rate of the four cultivars was Pernille>Legend>Feast>Motor. The growth of the four cultivars was inhibited by high Hg2+ concentration, and the survival rate of the four cultivars decreased with the Hg2+ increasing. When the concentration of Hg2+ reached 100 mg/kg,the survival rate of the four cultivars was Feast>Pernille>Legend >Motor.【Conclusion】In the range of experiment,the comprehensive growth of Feast under Hg2+stress was the best. However, Feast showed stronger enrichment ability in mercury-containing 25 mg/kg soil, which was suitable for restoration of low-mercury soil and establishment of lawn, Legend had the strongest ability to enrich mercury in mercury-containing 50 and 100 mg/kg soil, which was suitable for restoration of high-mercury soil and establishment of lawn. [ABSTRACT FROM AUTHOR]

【Objective】The objective of the paper is to provide a reference for soil nutrient management and sustainable operation in Karst areas.【Method】The soil samples were collected from woodland and dry land in Baiduo Village(dolomite areas) and Shiqiao Village(limestone areas) in Shibing County,Guizhou Province,and then the soil nutrient was analyzed.【Result】The soil developed from dolomite was featured with higher organic matters,total N,available P,available K and hydrolysable N.The soil developed from limestone was featured with higher total P and total K.Total N was positively and very significantly related to hydrolysable N and organic carbon in soil developed from limestone and dolomite.Hydrolysable N was positively and significantly related to organic carbon in limestone areas.Hydrolysable N was positively and very significantly related to organic carbon in dolomite areas.Land use patterns had obvious effects on nutrient content in soil developed from limestone and dolomite.Soil total K,total N,hydrolysable N and organic carbon content in limestone woodland was higher than dry land,and available K,total P,available P and pH was lower than dry land.Soil total P and available P in dolomite woodland are lower than dry land,and other indexes are higher than dry land.The organic matter,total N,total P and total K content in dolomite-developed soil was Grade II,Grade I,Grade VI and Grade III respectively.The organic matter,total N,total P and total K content in limestone-developed soil was Grade II,Grade I,Grade V and Grade I separately.【Conclusion】Soil nutrient was not only affected by soil forming rock,but also affected by land use pattern. [ABSTRACT FROM AUTHOR]