米老排人工林生物量研究

Study of Mytilaria laosensis Plantation Biomass

采用相对生长方程模拟从南亚热带引种的米老排林分生物量。结果表明:15年生米老排人工林分的生物量为195.972 t.hm-2,其中乔木层为194.772 t.hm-2,林分平均净生产量为15.610 t.hm-2a-1,其中乔木层为15.185t.hm-2a-1。乔木层中树干(包括树皮)、枝、叶和根系的生物量分别为99.664 t.hm-2、24.829 t.hm-2、5.074 t.hm-2和65.165 t.hm-2。乔木层叶面积指数5.274,叶的净同化率为329.2 g.m-2a-1。极端最低气温-8℃左右对生物量的增长产生负面影响。

The results showed that 15-year-old Mytilaria laosensis plantation stand biomass was 195.972 t·hm^-2, of which the arbor layer biomass was 194. 772 t· hm^-2, standing average net yield was 15.610 t·hm^-2a^-1, of which the arbor layer average net yield was 15.185 t·hm^-2 a^-1, the biomass of tree bole （including bark）, branch, leaf, and root system in the arbor layer were 99.6, 64, 24.829,5.074, and 65.165 t·hm^-2.The arbor layer leaf area index was 5.274, the leaf net assimilation rate was 329.2 g2m^-2a^-1. The extremely lowest temperature of about -8℃had the negative influence on the biomass increase.