AN INVESTIGATION ON THE CONTENT AND DISTRIBUTION OF MAJOR NUTRIENT ELEMENTS IN YOUNG MIXED STANDS OF CUNNINGHAMIA LANCEOLATA AND MICHELIA MACCLUREI

In this paper, the biomass, content and distribution of the major nutrient elements (N, P, K, Ca, Mg) during the period of one year in young pure stands of Cunninghamia lanceolate and young mixed-stands of Cunninghamia lanceolata and Michelia macclurei were investigated. The result showed that the content of nutrient elements in the five-year stand was higher than that of the other age-groups (7-8, 10-2020-30yr. ) stands, except the Ca. The requirements for nutrient elements in both species were the same, being N > K Ca>Mg>P, but the relative rpquirement for Michelia macchtrei was lower than that of Cunninghamia lanceolata, except the Mg.