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采用测定植株全部生物量的方法对红豆树人工林的生产力进行研究。用分层切割法测定10株样木地上部分各器官生物量,壕沟法测定地下部分根系生物量;用“相对变比生长”模型估得23年生红豆树林分生物量为121.488吨/公顷,其中乔木层为118.612吨/公顷;平均净生物量为5.282吨/公顷·年,乔木层为5.157吨/公顷·年;乔木层中树干(包括树皮)、枝、叶和根系的生物量分别为59.923、25.020、4.623和29.046吨/公顷。林分叶面积指数为5.68,叶的净同化率为303.13±30.46克/米~2·年。第23年生时树干年均净生产量与年间生产量曲线尚未相交,该林分仍属生产性生态系统。
The method of measuring the total biomass of the plant was used to study the productivity of the plantation. The stratified cut method was used to determine the biomass of various organs in the aerial parts of ten samples and the root biomass was measured by the trenching method. The biomass of 23-year-old mangroves was estimated to be 121.488 t / ha by “relative variable growth” The tree layer was 118.612 t / ha; the average net biomass was 5.282 t / ha · year, and the tree layer was 5.157 t / ha · year; the biomass of tree trunks (including bark), branches, leaves and roots in tree layer were 59.923, 25.020, 4.623 and 29.046 tons / hectare. The leaf area index was 5.68 and the net assimilation rate of leaves was 303.13 ± 30.46 g / m ~ 2 · year. The annual net net production of trunk at year 23 has not yet intersected with the annual production curve, which is still a productive ecosystem.