【摘要】 为确定土壤化学性质对土壤浸提液电导率的影响程度,应用通径分析的方法研究了不同再生水灌溉次数的污灌土壤的1∶5土水比土壤浸提液电导率(EC1∶5)与土壤化学性质各要素的关系。研究结果表明:全盐量、Cl-、Na+是影响土壤浸提液电导率的最主要因素;pH值对土壤浸提液电导率的影响很小;Ca2+、Mg2+、HCO3-、SO42-对土壤浸提液电导率的直接通径系数并不高,但是由于被其他化学性质要素的间接效应所增强,使得其对溶液电导率的间接通径系数之和较大。EC1∶5与全盐量、Cl-、Na+有很好的相关性。更多还原

【Abstract】 In order to evaluate the effect of soil chemical characteristics on electric conductivity,the method of path analysis was adopted to analyze the relations between electric conductivity of 1∶5 soil water extract(EC_1∶5) and soil chemical properties irrigated with reclaimed water.The results showed that total salt content;Cl^-and Na⁺ were the most primary factors to soils irrigated with reclaimed wastewater,while the pH value affected EC_1∶5 very weakly.Though direct path coefficients between the electric conductivity of soil water extract and the contents of Ca²⁺,Mg²⁺,HCO^-₃,SO^2-₄ and EC_1∶5 were not high,the sum of indirect path coefficients between EC_1∶5 and these factors were relatively high because they were enlarged by influence of other chemical factors.The relationships between EC_1∶5 and total salt content,Cl^-and Na⁺ were very significant.更多还原