Soil biological health assessment is an integral component of soil health evaluation, providing crucial insights into soil processes from a biological perspective. However, current soil health assessments primarily rely on soil physical and chemical indicators, lacking standardized methods and framework for incorporating soil biological indicators. We reviewed the development of soil health assessment and proposed a method, which incorporates the 'dimension reduction' of soil health index evaluation system using exploratory factor analysis and the 'scoring' based on cumulative normal distribution function into the soil biological health assessment. We further used this method to analyze soil biological health status of upland in black soil region at field and regional scales. The results showed that the use of exploratory factors could reflect soil biological health status in multiple dimensions, which was more conducive to formulating soil health conservation policies or measures according to local conditions. Our results highlighted the critical role of soil biota and their interaction networks in soil health assessment, which would provide necessary technical support for soil health assessment using soil biological indicators.
土壤生物健康评价是土壤健康评价的重要组成部分,对于我们从生物视角洞察土壤过程的变化至关重要。然而,目前的土壤健康评价大多数是基于土壤物理和化学指标进行的,如何利用土壤生物指标开展土壤健康评价尚没有统一的方法。本文梳理了土壤健康评价的发展历程,提出了基于探索性因子分析将土壤健康评价体系的“降维”和累积正态分布函数的“评分”纳入到土壤生物健康评价的方法,并利用该方法对黑土旱地田块尺度、区域尺度土壤生物健康状况进行分析。结果表明,探索性因子分析能够在多个维度上体现土壤生物健康状况,有利于因地制宜地制定土壤健康保育的政策或措施。研究结果体现了土壤生物及其互作网络在土壤健康评价中的重要作用,可为利用土壤生物指标开展土壤健康评价提供重要的技术支撑。.
Keywords: cumulative normal distribution function; factor analysis; soil biological indicator; soil health.