Determination of Phosphorus Fertilizer Soil Reactions by Raman and Synchrotron Infrared Microspectroscopy
Determination of Phosphorus Fertilizer Soil Reactions by Raman and Synchrotron Infrared Microspectroscopy
复制标题
拉曼和同步辐射红外显微光谱测定磷肥土壤反应
作者：
C. Vogel;C. Adam;R. Sekine;Tara L. Schiller;E. Lipiec;D. Mcnaughton
利用拉曼光谱和同步辐射红外光谱研究了污泥灰基肥料中含磷矿物相在土壤中的反应机理。不同的反应机制，在潮湿的土壤中发现钙和镁（焦）磷酸盐。正磷酸钙随着时间的推移转化为羟基磷灰石。相反，不同的磷酸镁转化为磷酸三镁。由于磷酸镁不能形成磷灰石结构，植物可利用的磷保留在土壤中，导致在农业盆栽实验中观察到更好的生长结果。焦磷酸盐的反应也非常不同。焦磷酸钙在土壤中不起反应。相比之下，焦磷酸镁迅速形成植物可用的磷酸二镁。
The reaction mechanisms of phosphate-bearing mineral phases from sewage sludge ash-based fertilizers in soil were determined by Raman and synchrotron infrared microspectroscopy. Different reaction mechanisms in wet soil were found for calcium and magnesium (pyro-) phosphates. Calcium orthophosphates were converted over time to hydroxyapatite. Conversely, different magnesium phosphates were transformed to trimagnesium phosphate. Since the magnesium phosphates are unable to form an apatite structure, the plant-available phosphorus remains in the soil, leading to better growth results observed in agricultural pot experiments. The pyrophosphates also reacted very differently. Calcium pyrophosphate is unreactive in soil. In contrast, magnesium pyrophosphate quickly formed plant-available dimagnesium phosphate.