抄録
The trace elements B, Co, Cu, Fe, Mn, Mo and Zn have been shown to be essential for the growth of plants and, with the exception of B, for animals. Seven other elements, Cr, Ni, Se, Si, V, Br and I are biofunctional though not essential. The roles played in plants by these elements are reviewed and the effects produced by deficiency. The analytical problem is surveyed from the viewpoint of the range of these elements in soils, their forms of occurrence and the influence of factors that affect their uptake by plants. Finally the means by which plant uptake is simulated to permit preventive or corrective measures to be made are discussed and the role played by some of the techniques of analytical atomic spectroscopy.
