新疆森林土壤形成特征及其系统分类  

THE GENETIC FEATURES AND THE CLASSIFICATION OF THE FOREST SOILS IN XINJIANG

作　　者：刘立诚[1] 排祖拉[1] 李淑芳[1] 

机构地区：[1]新疆大学,乌鲁木齐830046

出　　处：《干旱区地理》1999年第1期1-9,共9页Arid Land Geography

摘　　要：本文对新疆森林土壤的形成特征进行了研究，根据《中国土壤系统分类（修订方案》探讨了１０个剖面在土壤系统分类中的归属问题。In this paper, the genetic features of the forest soils in Xinjiang are researched, and the categories of ten soil profiles in the systematic classification are discussed based on the 'Chinese Systematic Classification of Soils (Revisal Proposal)'. The features of the forest soils in Xin- Jiang are as follows: organic carbon is 20. 0 - 77. 6g/kg, thickness of humic hirizon 31 - 82cm, most of the base saturation 61. 2 % -96. 3 %, and there is a mollic epipedon. The base saturation of partial alpine brown soil is 47. 6 %, and there is an unbric epipedon. HA/ HF and E_4 of wild fruit forest soil and gray-brown forest soil are 1. 05 - 1. 87 and 1. 60 - 2. 56 respectively, 'and that of alpine brown soil, gray-black soil and tuggic soil are 0. 46 - 0. 93 and 0. 72 - 1. 44 respectively. Rh of the wild-fruit forest soil with an isohumic property in Yili Vally is 0. 39. Caco3 in gray-brown soil and wild-fruit forest soil is 164. 4 - 202. 1g/kg, its thickness is 25- 31cm. Total salt in tuggic soil(15 cm thick) is 67. 3g/kg. Clay ratio of the most soils is 1. 20- 1. 69, Be thickness≥18cm, and there is an argillaceous horizon. Clay ratio of some soils is less than 1. 20, and there is a cambium. The eluvial degree is: alpine brown soil> gray-black soil > wild-fruit forest soil > gray-brown soil > tuggic soil. The total chemical compositions of clay grains (< 0. 002 mm) in alpine brown soil and gray-black soil are 1. 20 - 1. 17 and 1. 24 - 1. 18 respectively, which show that R_2O3 has a movement. Some clay minerals are contained in the soils. alpine brown soil contains montmoril- Ionite, illite and vermiculite, gray-black soil contains montmorillonite and illite, wild-forest soil and gray - brown soil contain illite and montmorillonite. The results show that the 10 soil pro- files belong to 4 orders, 7 suborders, 9 groups and 9 subgroups respectively.

关 键 词：新疆 森林土壤 形成特征 系统分类 土壤 

分 类 号：S714.1[农业科学—林学] S714.4