Shandong Provincial Key Laboratory of Water and Soil Conservation and Environmental Protection, College of Resource and Environment , Linyi University , Linyi , Shandong 276005 , People's Republic of China.
State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry , Chinese Academy of Sciences , Guangzhou , Guangdong 510640 , People's Republic of China.
J Agric Food Chem. 2019 Jun 26;67(25):7183-7189. doi: 10.1021/acs.jafc.9b01455. Epub 2019 Jun 13.
As a result of the important roles of boron (B) in the growth of plants, the uptake of B by plants is dependent upon the existing form and content of available B in soil, which can bring about the local cycle of B isotope equilibrium. A method using water-heating extraction combined with three-step ion-exchange chromatography was developed for the extraction and isotopic analysis of available B in soil. The extraction efficiency and fractionation of B isotopic composition in the procedure were investigated. The results showed that, in the upper layers of soils, the change of δB values was opposite that of the mass concentration and a similar variation between δB and content occurred in the lower layers. The isotope of available B in soil can create a featured isotopic signature to further understand the geochemical details related to the soil properties and molecular mechanism of B uptake in plants.
由于硼（B）在植物生长中的重要作用，植物对 B 的吸收取决于土壤中可用 B 的存在形式和含量，这可能导致 B 同位素平衡的局部循环。本研究开发了一种采用水热提取与三步离子交换色谱相结合的方法，用于提取和分析土壤中有效 B。对该方法的提取效率和 B 同位素组成分馏进行了研究。结果表明，在土壤的上层，δB 值的变化与质量浓度的变化相反，而在下层，δB 值与含量之间存在类似的变化。土壤中有效 B 的同位素可以形成一个特征同位素特征，以进一步了解与土壤性质和植物 B 吸收分子机制相关的地球化学细节。
