Abstract: Taking an 18-year field experiment in the lower reach of Liaohe River Plain as a platform, this paper analyzed the dynamic changes of trace elements in aquic brown soil under different fertilization modes. Fertilization had little effects on the concentrations of soil total trace elements, but affected the concentrations of soil available trace elements significantly. Treatment NPK+pig manure (M) had the highest concentrations of soil available trace elements, followed by treatments NPK, M, and CK. In all treatments, the budgets of soil trace elements were negative, with the deficit being NPK+M<M<CK<NPK, suggesting that applying chemical fertilizers alone aggravated the deficit, while applying organic manure could mitigate the deficit. The trace elements in test soil could be transformed from available pool to non-available pool and vice versa, depending on the budgets and the concentrations of soil available trace elements.

Key words: Camellia rosthorniana, Bionomic strategies, Fitness, Reproductive value