白浆土腐殖质化学组成初探  

CHEMICAL COMPOSITION OF HUMIC SUBSTANCES EXTRACTED FROM CULTIVATED ALBIC BLEACHED SOILS

作　　者：鄢来斌 夏荣基 

出　　处：《中国农业大学学报》1990年第S4期36-42,共7页Journal of China Agricultural University

摘　　要：土壤表层中胡敏酸的 C/N 元素比值表现为,暗棕壤>耕地白浆土>草甸土。草甸土 As层中胡敏酸的羧基等官能团含量特别低,暗棕壤中胡敏酸则与白浆土中相似。岗地白浆土和平地白浆土的胡敏酸元素组成没有明显差异,但其官能团含量有一些差异。开垦使胡敏酸的 C/N 元素比提高,富啡酸的 C/N 值下降,也使胡敏酸和富啡酸中的醌基等含量降低,使酮基和总羰基等值增加。The elemental composition of the humic acids shows that their C/N ratios decreased in the order of dark brown forest soils,cultivated albic bleached soils and meadow soils.No singnificcant differences exit between the terrace and alluvial plain albic bleached soils in their elemental composition,but only a little in their oxygen-containing functional groups.The cultivation practice on albic bleached soils increased the C/N of HA,the contents of ke- tonic C=O and total C=O groups in both HA and FA,and decreased the C/N of FA,quinone groups contents,Ph-OH/Al-OH and QC=O/KC=O in both HA and FA.

关 键 词：元素组成 含氧官能团 腐殖质组分 耕作 

分 类 号：S[农业科学]