Mineralogical study of clay fraction and analysis of humus fraction and base saturation confirmed the precision of the soil classification of these soils in our soil survey. 粘粒的矿物学鉴定和土壤盐基饱和度(BS)及腐殖质组分分析等,均证实了野外土壤勘察中对这些土类和亚类划分的确切性。
This paper verifies base saturation flow and heavy vehicle adjust factor in Design Regulation for At-grade Intersections on Urban Street ( abs. Shanghai Regulation ) through comparing analysis, on-the-spot survey and theoretical analysis. 本文采用比较分析、观测调查和理论分析的方法,对上海市《城市道路平面交叉口规划与设计规程》(以下简称《上海规程》)中基本饱和流量和大车校正函数进行检验。
Compared to bulk soil, rhizosphere soil showed lower pH, exchangeable Ca, Mg and base saturation but a higher exchangeable K. 与非根际土壤相比,根际土壤pH、交换性Ca、Mg和盐基饱和度(BS)明显降低,而交换性K高于非根际土壤。
Firstly, it compares the base saturation flow in Shanghai Regulation with that in other countries or cities, it is proved to be reasonable through on-the-spot survey, and is explained why it is relatively lower. 首先将《上海规程》中基本饱和流量与其它国家、地区/城市进行比较,通过实地观测与调查,认为《上海规程》中基本饱和流量取值是合理的,并对其原因进行分析;
The results showed a decrease of pH and base saturation, and increase content of exchangeable acidity in both uncontaminated and contaminated red soil and yellow red soil within the pH decreasing of simulated acid rain, significantly. 结果表明,随模拟酸雨pH值下降,土壤pH值和盐基饱和度(BS)明显降低,而交换性酸度明显增加,污染土壤中交换性氢含量比未污染土壤高,而交换性铝含量比未污染土壤低。