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大碱化土的判别、分类及改良利用中,度量土壤碱化程度的重要指标之一是碱化度。碱化度是用土壤胶体上的交换性钠离子占交换性阳离子总量的百分率来表示的。因测定交换性阳离子的设备费用较高,技术复杂,故在应用中常受到限制。为了将这一指标用于一般土壤碱化度的判别,我们将彰武县杨家苏打盐土壤改良利用典型区1982年以来的有关资料进行了分析整理,现介绍如下。试验方法和条件 (一) 试验方法目前,国际上通常采用pH、土壤溶液的电导率(Ec)和碱化度(ESP)作为度
One of the important indexes to measure the degree of alkalization of soil is the degree of alkalization in the discrimination, classification and improvement of large alkalized soils. The degree of alkalinity is expressed as the percentage of exchangeable sodium ions in the soil colloids relative to the total amount of exchangeable cations. Due to the high cost of the equipment for measuring exchangeable cations and the complicated technology, it is often limited in application. In order to use this indicator for the determination of the degree of alkalinity of soil, we analyzed and sorted the relevant data since 1982 in the typical area of saline soil improvement and utilization of Yangjia soda salt in Zhangwu County, as follows. Test methods and conditions (a) test methods At present, the pH, soil conductivity (Ec) and alkalinity (ESP) are commonly used as the international