THE EFFECTS OF FERTILIZERS ON THE GROWTH OF SOME FOREST TREES PLANTED ON BAUXITE-MINED LANDS.

Abstract

This study aimed at determining suitable fertilizers some forest trees planted on bauxite-mined lands (including the land returned by topsoil and the land rerurned by mud). The study was carried out on three species Melaleuca leucadendra, Acacia hybrid (A. mangium x A. auriculiformis) and Pinus kesiya. The results have shown that fertilizers have had effects on the growth of the 3 species, but the effects have been not clear between experimental fertilizer formulas.

The research results have also shown that the fertilizer N, P, K remarked on the height and stem diameter of the study species grown on the land returned by mud better than on the land returned by topsoil on the land relcaed by topsoil, but there was no significant differentiation.