【摘要】 本文对24年生楠木林的生物量进行了测定。结果表明:楠木叶、枝、树干和根系生物量分别为4.25、12.03、38.05和23.62(t/ha),下木和草本层为8.46t/ha(合计86.41t/ha);树干的净同化率变幅范围22.7—214.39g/(a·m~2);林分树干净生产量1.585t/(ha·a),年间净生产量最大值3.228t/(ha·a),出现于13年生。更多还原

【Abstract】 The biomass of the cultivated nanmu stands of 24 age has been studied. The results sho-w that, ( i ) the biomasses of standing crop were 4.25, 12.03, 38.05 and 23.62 ( t/ha ) for the foliage, branches, stems and roots system respectively; while for the understory and herbage it was 8.46 t/ha (total 86.41 t/ha), (2) the mean net production rate of the stems was 1.585 t/(ha.a) which is found in 13 year-old stand and (3) net assimilation rate for different stems varied from 22.7-214.3 g/(a.m2), and averaged 48.0 g/(a.m2).更多还原