青藏高原东北部边缘区栗钙土的历史演变  

HISTORIC EVOLUTION OF CHESTNUT SOIL IN THE NORTHEASTERN MARGINAL AREA OF THE QINGHAI-TIBET PLATEAU

作　　者：胡双熙[1] 徐齐治[1] 张维祥 吴文英 

机构地区：[1]兰州大学地理系

出　　处：《土壤学报》1991年第2期202-210,共9页Acta Pedologica Sinica

摘　　要：本文根据土壤^(14)C、孢粉和物理化学分析资料,探讨了青藏高原东北部边缘区栗钙土的成土环境和历史演变过程及其主要理化性质。(1)晚更新世晚期栗钙土已有发育,集中形成于全新世中期和晚期。(2)成土期草本孢粉占90%左右,仅有少量木本花粉出现。(3)栗钙土的剖面结构由现代土壤和不同时代的古土壤构成。(4)土壤矿物风化弱,腐殖质化程度低。Based on ^(14)C-dating, pollen analysis and physical and chemical data, the formation environment, historic evoluation process and major physical and chemical properties of chestnut soil in the northeastern marginal area of the Qinghai-Tibat plateau were studied. The following conclusions are proved: (1) The soil had already developed during the late-Pleistocene, but mostly developed in the middle and late Holocene; (2) The herbaceouss pollen in the soil-forming period occupies about 90%, of which Artemisia sp. and Compositae dominate,and small amount of xylophata pollen is found in some regions; (3) The profile structure of chestnut soil is made up of recent soil and paleosol developed in different time; (4) The wealk weathering of soil minerals and faint humification of the soil are because of dry and frigid climate in soit forming process.

关 键 词：青藏高原 栗钙土 历史演变 

分 类 号：S155.28[农业科学—土壤学]