Sager Manfred
Bioforschung Austria, Esslinger Hauptstrasse 134, A-1220 Vienna, Austria.
Plants (Basel). 2021 Dec 28;11(1):85. doi: 10.3390/plants11010085.
In this study, soil dissolution kinetics were evaluated to predict the metal uptake of lettuce plants under varying conditions of fertilisation and metal pollution. Velocities and time dependencies of soil dissolution obtained by electro-ultrafiltration (EUF), which prevents back reaction, were modelled in three ways, obtained from suspensions in 0.002 M DTPA at determined soil pH levels, for cases in which sampling versus time led to decreasing concentrations. The models yielded a maximum achievable concentration, a timespan needed for it to be reached, a slope, and an intercept of the respective fitted curves. Three geogenically metalliferous soil samples and one ambient soil sample, both as originals, fertilised with PK or soaked with a Cd-Ni-Pb solution, were used as solid samples. The resulting kinetic parameters were correlated with the amounts absorbed by lettuce plants grown with these substrates in pot experiments, which yielded fairly good correlations with Zn, but also with Li and Sr, as well as Ni and Pb, mainly because of differences due to the addition of a metallic salt solution. Plant growth was hardly influenced by the additions.
在本研究中，对土壤溶解动力学进行了评估，以预测在不同施肥和金属污染条件下生菜植株对金属的吸收情况。通过防止逆反应的电超滤（EUF）获得的土壤溶解速度和时间依赖性，针对在特定土壤pH水平下0.002 M DTPA悬浮液中采样随时间导致浓度降低的情况，采用三种方式进行建模。这些模型得出了各自拟合曲线的最大可达到浓度、达到该浓度所需的时间跨度、斜率和截距。三个地质成因的含金属土壤样品和一个环境土壤样品，原样、用PK施肥或用镉 - 镍 - 铅溶液浸泡后，用作固体样品。所得动力学参数与盆栽实验中用这些基质种植的生菜植株吸收的量相关，这与锌有相当好的相关性，与锂和锶、镍和铅也有相关性，主要是由于添加金属盐溶液导致的差异。添加物对植物生长几乎没有影响。
