土壤学报2023，Vol.60Issue(5)：1421-1429,9.DOI:10.11766/trxb202211160624
典型黑土的黑度与土壤有机质组分关系研究
Study on the Relationship Between Blackness and Soil Organic Matter Fractions of Typical Mollisol
摘要
Abstract
[Objective]Soil color is an important soil property.It is frequently used by soil scientists for the identification and classification of soil.It is also used as an indicator of many soil properties.Soil organic matter(SOM)is the most important pigment,that colors the soil in black color.[Method]In this study,a total of 30 mollisol samples were collected from the typical black soil region of northeast China.The SOM was physically separated into four fractions:light fraction,coarse particle fraction,fine particle fraction,and mineral-associated fraction.Based on the CIE L*a*b*color analysis system,the darkness of bulk soil and soil physical fractions were analyzed using a spectro-colorimeter.The objective was to quantify the relationships between SOM content and the color of black soil and to reveal the contribution of different physical fractions to soil blackness.[Result]Bulk soil blackness was strongly positively correlated with the SOM content.Similarly,significant relationships were observed between the blackness of physical fractions and the organic carbon content in corresponding fractions.This relationship was gradually strengthened with the increase in the stability of the fractions.As for the color of soil physical fractions,the blackness value of light and coarse particle fractions was greater than that of fine particle and mineral-associated fractions.Also,correlation analysis showed that there was no significant relationship between the blackness of light or coarse particle fractions and the bulk soil blackness,and the contribution rate of the two fractions to bulk soil blackness was only 2.6％.[Conclusion]The the mineral-associated fractions,as the main storage location of soil humus,contributed more than 81％to bulk soil blackness and plays a decisive role in coloring the soil black.关键词
土壤颜色/土壤有机碳/亮度值/物理分组/黑土Key words
Soil color/Soil organic carbon/Lightness/Physical fraction/Mollisol分类
农业科技引用本文复制引用
郝翔翔,王翠,邹文秀,严君,韩晓增..典型黑土的黑度与土壤有机质组分关系研究[J].土壤学报,2023,60(5):1421-1429,9.基金项目
国家重点研发计划项目(2021YFD1500400、2022YFD1500100)、中国科学院战略性先导科技专项(A类)(XDA28070100)和财政部和农业农村部国家现代农业产业技术体系(CARS-04)共同资助 Supported by the National Key R & D Program of China(Nos.2021YFD1500400,2022YFD1500100),the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDA28070100),and the China Agriculture Research System of MOF and MARA(No.CARS-04) （2021YFD1500400、2022YFD1500100）
