The present paper deals with the composition of the newly formed humus derived from various plant materials decomposed in a Quaternary red clay and in a in a Xiashu loess for 3 years.Experiment results showed that 1.the ratio cf C/org.N and fractional humus composition of newly formed humus varied with the kinds of plant material from which it was derived:2.as compared with those formed under submerged conditions,the newly formed humus formed under upland condition had higher C/org.N and hexoses/pentoses ratios and sugar content as well as a higher extractability of humic substances;3.the newly formed humus formed in Xiashu loess had a lower C/org.N ratio,but higher HA/FA and hexoses/pentoses ratios than that in Quaternary red clay.The role of clay mineral in the formation of humic substances is discussed.
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程励励,文启孝,阮立山.母质对新形成腐殖质的影响[J].土壤学报,1987,24(2):105-110. Cheng Lili, Wen Qixiao, Ruan Lishan. THE EFFECT OF PARENT MATERIAL ON THE NEWLY FORMED HUMUS[J]. Acta Pedologica Sinica,1987,24(2):105-110.