Determination of humification degree of organic matter of an oxisol and of its organo-mineral fractions

Quimica nova

Milori, Débora M. B. P.¹  Rosa, Jadir Aparecido²  Leite, Wellington Claiton³  Favoretto, Célia Mara³  Saab, Sérgio da Costa³  Gonçalves, Daniele³  Brinatti, André Maurício³ 

[1] Embrapa Instrumentação Agropecuária, São Carlos, Brasil;Pólo Regional de Ponta Grossa, Ponta Grossa, Brasil;Universidade Estadual de Ponta Grossa, Ponta Grossa, Brasil

关键词: humification;    LIF;    whole soil.;   

DOI  :  10.1590/S0100-40422008000800015

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

Laser-inducedfluorescence spectroscopy was used to determine the humification degree of theorganic matter of a whole soil, that is, soil without any physical or chemicaltreatment. Particle size was determined in physically separated fractions. Thehumification of organic matter, the depth of the soil and the planting systemcan be correlated. On the surface of the soil, no tillage provided the smallesthumification in comparison with the conventional tillage and reduced tillage.The fractions of the superficial layer of the soil (0-20 cm) indicated largerhumification in the fraction from 20 to 53 µm and the smallest in the fractionof <2 µm.

【 授权许可】

CC BY