Use of the regional models to the yardstick-conversion research aimed at the hilly and gully regions of the Loess Plateau
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DOI：10.7606/j.issn.1000-7601.2005.02.30
Key Words: yardstick conversion  model  hilly and gully regions  Loess Plateau
Author NameAffiliation
CHANG Xin The Institute of Soil and Water Conservation，Chinese Academy of Sciences，Shaanxi，Yangling 712100，China； The College of Agronomy and Bio-technology，China Agriculture University，Beijing 100094，China 
CHENG Xu The Institute of Soil and Water Conservation，Chinese Academy of Sciences，Shaanxi，Yangling 712100，China 
LIU Guo-bin The College of Agronomy and Bio-technology，China Agriculture University，Beijing 100094，China 
QIU Hua-jiao The Institute of Soil and Water Conservation，Chinese Academy of Sciences，Shaanxi，Yangling 712100，China 
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Abstract:
      In terms of the yardstick-conversion requirements of the research methods for sustainable land use in the loess plateau，the planning idea of the advance condition land use and the APEX （ agricultural policy ／ environmental extender） ，an estimation models of land productivity，were adopted to simulate the land use of Zhifanggou catchments，a model in the comprehensive catchments control of the loess plateau，which covered 8．27 km2．The results showed that the soil loss computed with the simulation and the actual soil loss differed by less than 10％ and the annual weighed crop yield obtained with the simulation did not significantly differ from the actual crop yield．According to these results，the effects of different rotation modes，different cultivation modes on crop production were estimated and analyzed．
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