title: Study of transport processes in soils and plants by microautoradiographic and radioabsorption methods.
abstract: The concentration profiles of lead and boron in carrot root and potato tuber were determined at various diffusion times by microradiographic method. The order of magnitude of the diffusion coefficient of lead ions and borate- or tetraborate ions was 10-13 m2s-1 and 10-11 m2s-1, respectively. The transport process of nutrients, leaf-manures and plant-protecting agents in plants was investigated by radioabsorption method. The effect of complex-forming agents on the absorption of nutrients and leaf-manure compositions was also examined. The influence of the pH of soils and complex-forming agents on the effective diffusion coefficients of nutritives was studied by means of the radioabsorption technique. In soils, the effective diffusion coefficient of the nutrients was found to change in the region 10-16-10-10 m2s-1. The data of the measurements give valuable information about the transport processes in plants and soils, allowing control and influence thereof.
mesh_terms: D000042:Absorption; D001345:Autoradiography; D001692:Biological Transport; D001895:Boron / Q000493:pharmacokinetics; D004058:Diffusion; D007854:Lead / Q000493:pharmacokinetics; D010944:Plants / Q000378:metabolism*; D011868:Radioisotopes; D012987:Soil
chemical_list: D011868:Radioisotopes; D012987:Soil; D007854:Lead; D001895:Boron