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

Química Nova

Leite, Wellington Claiton¹  Pólo Regional de Ponta Grossa, Ponta Grossa, Brasil¹  Universidade Estadual de Ponta Grossa, Ponta Grossa, Brasil¹  Favoretto, Célia Mara¹  Embrapa Instrumentação Agropecuária, São Carlos, Brasil¹  Rosa, Jadir Aparecido¹  Saab, Sérgio da Costa¹  Milori, Débora M. B. P.¹  Brinatti, André Maurício¹  Gonçalves, Daniele¹ 

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-induced fluorescence spectroscopy was used to determine the humification degree of the organic matter of a whole soil, that is, soil without any physical or chemical treatment. Particle size was determined in physically separated fractions. The humification of organic matter, the depth of the soil and the planting system can be correlated. On the surface of the soil, no tillage provided the smallest humification in comparison with the conventional tillage and reduced tillage. The fractions of the superficial layer of the soil (0-20 cm) indicated larger humification in the fraction from 20 to 53 µm and the smallest in the fraction of <2 µm.

【 授权许可】

Unknown