Abstract
Salix psammophila is an important plant for the stabilization of the dune in Ordos plateau in China. It is necessary to consider about the water consumption through the plant and the efficient plant productivity for proper land use of the arid conditions. To evaluate the productivity of Salix psammophila, diameters of annual rings of shoots were measured. The allometric relations among various factors of the shoot, for instance, the relation between the diameter and the leaf dry weight, had been revealed. A simple growth model was made based on the annual ring growth and the allometric relations. The calculation by the model showed that the productivity of the shoot as raw materials such as fuel wood increased with year, and it reached the maximum value between age range 4-6 years.
