【摘要】 用土钻法研究了西双版纳橡胶Hevea brasiensis林0～20cm土层中≤2mm细根的生物量和生长量,用分解袋法研究了橡胶林细根的分解,结果表明:0～10cm的细根生物量显著高于10～20cm的细根生物量（p<0.01）;在0～20cm土层中,橡胶林活细根和死细根现存量分别为2 206 kg·hm^-2和345 kg·hm^-2;活细根现存量的最大值出现在5月份,最小值出现在11月份;死细根现存量的最大值出现在2月份,最小值出现在8月份;年分解量、年死亡量、年生长量和年周转率分别为213 kg·hm^-2、733 kg·hm^-2、1 801 kg·hm^-2和82%。更多还原

【Abstract】 Soil corer was used to investigate the biomass and production of fine roots （≤2mm） and nylon litter bag to measure the decomposition of fine roots in the rubber （Hevea brasiensis） plantation of Xishuangbanna. Yunnan. SW China. The results show that fine roots biomass at the depth of 0～10 cm is significantly higher than that of 10～20 cm （p<0.01）; that the mean standing pools of living and dead fine roots are respectively 2 206 kg· hm^-2 and 345 kg· hm^-2; and that the standing pool of living fine roots is maximum in May and minimum in November. while that of the dead fine roots is maximum in February and minimum in August. Annual decomposition, mortality, production and turnover rates are respectively 213 kg · hm^-2, 733 kg· hm^-2, 1 801 kg ·hm^-2 and 0.82 times ·r^-1.更多还原