新疆干旱土的分类  

Classification of Aridisols in Xinjiang

作　　者：李述刚[1] 程心俊[1] 

机构地区：[1]中国科学院新疆生物土壤沙漠研究所

出　　处：《干旱区研究》1991年第2期44-49,共6页Arid Zone Research

摘　　要：新疆以天山山脉为界,其北部为温带荒漠、半荒漠,南部为暖温带荒漠、半荒漠。新疆地处欧亚大陆腹地,干旱土面积大、类型多,在国际干旱土分类研究领域中有着重要地位。干旱土作为土纲(Aridisols)是由美国首先提出的。干旱土的定义是指具有干旱土壤水分状况、淡色表层和若干特有的诊断表下层与诊断特征的土壤。这一概念已为我国所接受,而列入中国土壤系统分类(1990、首次方案)。This article dealt with the classification of aridisols in Xinjiang.On the basis of study on arid region in Xinjiang for many years, the author put forward the revised plan to the chinese soil systematic classification (the initial sheme). It divided the aridisols order into four suborders: 1. Orthids that at least possessed of one of the following diagnostic horizons: Cambic horizon, residual saline horizon, gypsic horizon or salt pan horizon. 2. Argids that have an argillic horizon or natric horizon, which is first provided in China. 3. Calcic xerosols that have a calcic horizon. 4. Alpine frigid aridisols that have frigid soil temperature regime. In the article, 9 soil great groups and 20 subgroups were delimited and provided some diagnostic horizons and diagnostic characteristics of each subgroup. Lastly, the author discussed the foundations ot classification.

关 键 词：干旱土 分类 新疆 诊断层 

分 类 号：S155.54[农业科学—土壤学]