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本文是对我国热带亚热带7个低地粘性土的粘粒部分的矿物学和化学组成的分析资料及其计算机数学分析结果。这些土壤的粘粒矿物学组成有很大差异,但都有相当量的高岭石剖面中存在脱硅富铝趋势。主组元分析和因子分析表明,粘粒部分化学元素的赋存状态基本上可分为硅酸盐矿物组和氧化物组。粘粒矿物学和元素组成特点的差异,主要决定于母质的起源特性,而并非决定于气候。但利用条件对耕层土壤的粘粒的矿物学和元素组成有明显的影响,作为水耕成土过程的特点,铁铝发生了分异运动。此外,主组元分析和因子分析是分析土壤中多种组分相互联系的良好方法。
In this paper, the mineralogical and chemical compositions of the clay fractions of seven lowland cohesive soils in the tropical and subtropical China are analyzed and the result of computer numerical analysis is given. The clay mineralogical composition of these soils is quite different, but there is a considerable amount of kaolinite sections in the desiliconization of aluminum-rich tendency. The principal component analysis and factor analysis show that the occuring state of some clay minerals can be divided into silicate mineral group and oxide group. The differences in the characteristics of clay mineralogy and elemental composition depend mainly on the origin of the parent material and not on the climate. However, the utilization conditions have a significant effect on the mineralogy and elemental composition of clay in the topsoil. As a characteristic of hydroponics, the aluminum and aluminum are differentiated. In addition, principal component analysis and factor analysis are good ways to analyze the interconnection of multiple components in soils.