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[Objective] The objective of the paper is to discuss soil carbon, nitrogen, phosphorous content and their ecological stoichiometric characteristics, to explore ecological stoichiometric characteristics of soil nutrient elements and to provide the scientific basis for improvement of soil nutrient content in Guizhou province. [Method] The ecological stoichiometric characteristics of topsoil in Guizhou province are analyzed by using literature collection and ANO VA methods. [Result] The average value of SOC, TN and TP in soil of the research area was 27. 34, 2. 11 and 0. 7 4 g ·kg-1, respectively. C N, C: P and N: P was 14. 27, SO. 92 and 3. 75, respectively. The variance coefficient of SOC, TN, TP, C N, C P and N: P was 71. 22 %, 61. 61 %, 79. 73 %, 7S. S4 %, 90. 67 % and 78. 93 %,respectively. The spatial variability in TP and C P was the maximum. Soil SOC, TN, TP and their ecological stoichiometric characteristics were correlated significantly. [Conclusion] SOC, TP and C N in soil of Guizhou province is higher than SOC (17. 12 g ·kg-1), TP (0. S6 g ·kg-1) and C N (12. 30) of national land soil. The variance coefficient of soil SOC, IN, TP and their stoichiometric ratio ranges from 0. 1 to 1l. SOC is the main factor affecting TN, C N and C: P. [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]