陕北水蚀风蚀交错带土壤特性及系统分类研究

对陕西北部神木、榆林、定边等县区 11个典型剖面的分析研究表明 ,本地区土壤存在不同程度的退化现象 ,表现为土壤机械组成粗化 ,有机质含量较低 ,氮磷营养成分贫乏 ,土壤交换性能较差等。在系统分类中共检索出 5个土纲 ,7个亚纲 ,11个土类。发生分类与系统分类结果之间既存在着差异 ,也有一定的对应关系。

Study on the pedogenesis characteristics and soil taxonomy in the wind-water erosion crisscross zone of north of Shaanxi

Based on analysis of 11 typical soil profiles in Shenmu,Yulin and Dingbian counties of Shaanxi province,the results indicate that soils in this areas have different degradation.The main phenomena are mechanical composition tending coarse,organic matter and nutrients and capacities of exchange decreasing progressively.The soils are divided into 5 Orders,7 Suborders,11 Groups (Hemi-orthic histosols,Haplo-orthic gleysols,Calc-ustic luvisols,Haplo-ustic luvisols,Mot-ustic cambisols,Calc-ustic cambisols,Haplo-ustic cambisols,Ust-sandic entisols,Ust-alluvic entisols,Loessal-orthic entisols,Red-orthic entisols) in Taxonomy.It's found that there is either difference or corresponding relations between soil taxonomy and pedogenesis classification.