摘要
采用实验室合成和实验室模拟的方法,研究了高分子腐殖酸和低分子柠檬酸,在不同固液比、不同浓度条件下对几种人工合成磷源的释磷效应。结果表明,两种有机酸对人工合成磷酸盐中磷素的活化与有机酸的种类、浓度、固液比和磷酸盐的种类有关。供试的两种有机酸(腐殖酸、柠檬酸)均能不同程度地促进不同合成磷源(磷酸二钙、磷酸八钙、氟磷灰石、铁磷、铝磷)中磷素的释放,释磷量最高可达2490 mg.kg-1;有机酸对合成磷酸盐中磷素的活化随着有机酸浓度的增加而增加,而固液比变化时,各合成磷源的活化情况无固定趋势;在相同条件下(短时间内),低分子的柠檬酸对合成磷酸盐中磷素的活化能力强于高分子的腐殖酸,且柠檬酸作用下的释磷量可以达到腐殖酸的3倍以上。
The influence of organic acids, humic acid and citric acid, on phosphorus release from synthesized phosphates was studied with chemical extraction. The main results were as follows： the two organic acids , humic acid and citric acid, improved phosphorus release from different synthesized phosphate compounds （ DCP, OCP, FA, Fe - P, Al- P） ; The mobilization of phosphorus by organic acids varied with the types, concentrations and the solid - liquid proportion of organic acids and the solubility of phosphates. The extent of mobilizing increased with increment of organic acid concentration for the same organic acid ; and the extent of mobilizing were not discipline with the change of the solid - liquid proportion; in the same condition （in a short time）, the ability of citric acid in mobilizing phosphorus from synthetic phosphate was stronger than humic acid.
出处
《中国土壤与肥料》
CAS
CSCD
北大核心
2009年第3期44-47,共4页
Soil and Fertilizer Sciences in China
关键词
腐殖酸
柠檬酸
合成磷源
释磷效应
humic acid
citric acid
synthetic phosphate compounds
release of phosphorus
作者简介
冯晨（1985-），女，辽宁大石桥市人，硕士研究生，主要从事土壤肥力学的研究。
通讯作者为关连珠。
