Biochemical origin and refractory properties of humic acid extracted from the maize plant

被引：22

作者：

Adani, Fabrizio ^{[1
]}

Spagnol, Manuela ^{[1
]}

Genevini, Pierluigi ^{[1
]}

机构：

[1] Univ Milan, Dipartimento Prod Vegetale, I-20133 Milan, Italy

来源：

BIOGEOCHEMISTRY | 2006年 / 78卷 / 01期

关键词：

C-13-CP-MAS-NMR; cell wall; humic acid; maize plant; porosity;

D O I：

10.1007/s10533-005-2902-7

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Humic acids (HA) contribute to soil fertility because of their chemical, physical, and biological properties. The origin of HAs in soils has puzzled scientists for decades, and what HAs are and what their origin is remain unclear. The isolation of HAs in plants, which have characteristics close to soil HAs, suggests the probable origin of soil-HA is the preservation of plant tissue, indicating biochemical origin. In this paper HA from maize plant at different stages of maturity is isolated, from which it was found that the evolution of this fraction depends on and is derived from cell wall formation. Evidence was also found that HA was above all composed of lignin and cutin residues, and was characterized by low surface area. After 8 months of incubation in both mineral-artificial and natural soils, humic acid isolated form maize plant could be recovered intact.

引用

页码：85 / 96

页数：12

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