USE OF ORGANIC-CARBON AND LOSS-ON-IGNITION TO ESTIMATE SOIL ORGANIC-MATTER IN DIFFERENT SOIL TYPES AND HORIZONS
USE OF ORGANIC-CARBON AND LOSS-ON-IGNITION TO ESTIMATE SOIL ORGANIC-MATTER IN DIFFERENT SOIL TYPES AND HORIZONS
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DOI：
10.1007/bf00634106
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发表时间：
1990-01-01
影响因子：
6.5
通讯作者：
HOWARD, DM
中科院分区：
文献类型：
--
作者：
HOWARD, PJA;HOWARD, DM
引燃损失（LOI）和有机碳含量被用来估算土壤有机质。有机质通常用1.724的系数从有机碳中估计出来。几位作者通过简单的线性回归研究了LOI（用来估计有机质）与C之间的关系。在本研究中，这一方法与两组数据进行了检验。由于结合水的存在，LOI高估了含有大量粘土矿物的有机质土壤的LOI:C值，校正结合水后的LOI:C值小于1。结果表明，不同土壤和层位有机质性质的差异使简单回归方法不适合。需要更多地注意对有机物性质的研究。
Loss-on-ignition (LOI) and the organic C content have been used to estimate soil organic matter. Organic matter is often estimated from organic C by applying a factor of 1.724. Several authors have examined the relationship between LOI, used as an estimate of organic matter, and C by simple linear regressions. In the present study, this approach was examined in relation to two sets of data. LOI overestimates organic matter soils with significant proportions of clay minerals because of bound water, and correcting for bound water gives some LOI:C ratios of less than 1. It is concluded that differences in the nature of the organic matter in different soils and horizons make the simple regression approach unsuitable. More attention needs to be paid to studies of the nature of the organic matter.