Fósforo em cronossequência de cana-de-açúcar queimada no cerrado goiano: análise de ácidos húmicos por RMN de 31P

Química Nova

Celeste Q. Rossi²  Marcos G. Pereira²  Andrés C. García²  Adriano Perin¹  Paulo R. Gazolla¹  Antonio P. González¹ 

[1] ,Universidade Federal Rural do Rio de Janeiro Departamento de Solos Seropédica RJ ,Brasil

关键词: humic substances;    vinasse;    organic phosphorus;   

DOI  :  10.1590/S0100-40422013000800009

来源: SciELO

【 摘 要 】

The aim of this study was to identify, with the use of 31P NMR spectroscopy, organic P species in humic acids (HA) in samples from Oxisol cultivated in chronosequence with sugar cane, pasture and Cerrado. The main forms of P-type found were orthophosphate, monoester-P (phosphate sugars) and P-diester (orthophosphate). The 31P NMR technique proved capable of identifying changes in the areas studied as a function of sugar cane burning time. In areas with 1 and 5 years of burnt cane, a decrease in recalcitrant organic P in humic acids indicated the need for use of P-humic substances for plant nutrition.

【 授权许可】

CC BY-NC   
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