Phosphorus in chronosequence of burnt sugar cane in cerrado: humic acid analysis by 31P NMR

Química Nova

Perin, Adriano¹  Universidade da Coruña, La Coruña, ES¹  Instituto Federal de Educação, Ciência e Tecnologia Goiano, Rio Verde, Brasil¹  García, Andrés C.¹  Pereira, Marcos G.¹  Rossi, Celeste Q.¹  Universidade Federal Rural do Rio de Janeiro, Seropédica, Brasil¹  Gazolla, Paulo R.¹  González, Antonio P.¹ 

关键词: humic substances;    vinasse;    organic phosphorus.;   

DOI  :  10.1590/S0100-40422013000800009

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 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】

Unknown