摘要
就四川盆地西部白垩系灌口组（Ｋ２ｇ）母岩发育紫色雏形土的特征及其基层分类进行了研究。发现盆西Ｋ２ｇ紫色雏形土在理化性、肥力和生产性上都有一些特点。采用专家系统建立了紫色雏形土基层分类指标体系，提出以三维指标进行土壤基层分类的新方法，以此对该土壤土系划分进行尝试。
About
100,00 ha of purple Cambisol derived from K 2g purple parent rock is distributed in the west of
Sichuan basin,which accounts for 4.3% of soil area in Sichuan basin and is the one of main
agriculture soil in west Sichuan.The characteristics of this kind of soil are :reddish soil
color,mostly red_brown color(2.5 YR or 10 R);higher amount of soil clay particle (<0.002
mm),some 20～32%;normally higher amount of time,CaCO 3 content being 16.4～61.6g/kg,PH
of soil reaction 7.6～8.7; reasonable soil fertility in texture,structure,soil_body type and
productivity. The distinction of soil species for basic K 2g purple Cambisol classification was
in the light of texture,thickness of soil horizon and soil fertility.According to above three
criteria the basic soil species were determined by establishing soil classifying principles and
three dimension methods for species classification.Then the local name in that this soil species
of was discoveved was put in front of the term for this basie soil species. Dividing for several
soil species,K 2g purple Cambisol could indicate the actual soil situation with the advantages
of quantitative criterion,science in indexing and application in agriculture.So this classification
method should be researched further and spreaded for application.
出处
《山地学报》
CSCD
1999年第1期28-33,共6页
Mountain Research
基金
中国科学院重点项目
