Introduction to the Database of Huanjiang Observation and Research Station for Karst Ecosystem
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  Both as a member of the National Ecosystem Research Network of China (CNERC)  and of the Chinese Ecosystem Research Network of CAS (CERN), the Huanjiang Observation and Research Station for Karst Ecosystem (HORSKE in short), Chinese Academy of Sciences (CAS) aims at developing monitoring approaches for the mechanisms (succession, degeneration and responses) of Karst ecosystems, the evaluation of ecosystem service functions and health, and the development techniques of sustainable and optimized demonstration for Karst ecosystems. Data generated  from the HORSKE multiple missions, such as long-term eco-monitoring of Karst agricultural and natural ecosystems according to CERN and CNERN criteria, and programs of research based at HORSKE, having been on-going for years, it comes into being the database of HORSKE. Presently the Database of HORSKE is composed of four monitoring datasheets, including fields on meteorology, hydrology, vegetation and pedology of the Karst ecosystem. The collected and collecting data can be reached at the website http://data.ecokarst.isa.ac.cn, and the contents are as follows:

  (1) Database on Meteorology

  Meteorological database of regular observation in the station proper. (since 2005)

  Meteorological database of automatic observation in the station proper. (since 2005)

  Database of automatic observation on field micro-climate. (since 2008)

  (2) Hydrological database

  Hydrological database of soil moisture monitored by TDR: Since 2006 HORSKE has been monitoring soil moisture by TDR fixed under different field uses (including grassland and cropland);

  Database on element contents in long-term sampling of water quality (since 2007)

  Database on element contents in rainfall at the Karst agro-ecosystem (since 2007)

  Database on dynamic features of shallow groundwater of Karst agro-ecosystem (since 2007)

  (3) Vegetation database

  The sheets on Vegetation data include: Biological properties and biomass of corn, soybean, forage, sugarcane, rice, mulberry, etc. and respective fertilizer applications, Content of microelements and macroelements (total N, P, K, Ca, Mg, Na, ect.) in the plants. (since 2007)

  (4) Pedological database

  The pedological database includes soil nutrient outputs from different soil types, different position, and different applications; Detailed items of the datasets include total nitrogen, organic matter, total phosphorus, total potassium, pH, cation exchange capacity, exchange calcium, magnesium, potassium and sodium, rapidly available phosphorus, rapidly available potassium, water-soluble nitrogen (alkali), slow available potassium, soil mineral total analysis, soil heavy metal, microelement, soil constituents. (since 2006)