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对不同生育期的油桐林生物量和大量营养元素(N、P、K、Ca、Mg)的生物循环进行了研究。结果表明,桐林的生物量随树龄的增大逐渐积累,从幼龄期开始到20年生的桐林,其生物量的积累值为79,61t/ha。桐林不同生育期的光合产物在各器官中的分配比例不同。经济产量(果生物量或种仁生物量)随树龄的动态变化服从二次抛物线函数:W_(FR)=-2.11398+0.82471(t-1)-0.03540(t-1)~2W_S=-1.37257+0.38539t-0.01706t~2不同生育期,桐林中大量营养元素的吸收量、存留量、归还量和输出量均不同。
The biomass and the macro-nutrients (N, P, K, Ca, Mg) of tung oil tung tree were studied at different growth stages. The results showed that the biomass of Tonglin gradually increased with the increase of tree age. The biomass of Tonglin was 79,61 t / ha from the beginning of young age to 20 years old. Tonglin different growth stages of photosynthetic products in different parts of the distribution of different proportions. The economic output (fruit biomass or seed biomass) obeyed the quadratic parabola function with the dynamic change of tree age: W FR = - 2.11398 + 0.82471 t - 1 -0.03540 t - 1 ~ 2W_S = -1.37257 + 0.38539t-0.01706t ~ 2 At different growth stages, a large number of nutrients in Tonglin absorbed, retained, returned and output were different.