【摘要】 研究了锥栗 Castanea henryi人工林在未结果期、结果初期和盛果初期 3个不同的发育阶段的生产力特征 .结果表明 :随着林分生长年龄的增大 ,生产力上升 ,未结果期 ,结果初期 ,盛果初期年净生产量分别为 1.10 9t/hm2· a,3 .82 3 t/hm2· a和 8.93 0 t/hm2 · a;经济产量的增加与生物量增加趋势一致 ;叶面积指数至盛果初期可增至 1.963 2 ;未结果期 R值 (相对生长率 )较大 ,盛果初期较小 ;N AR值 (净同化率 )在结果初期最大 ,然后又下降 ,表明其随着树冠生长而变化 .更多还原

【Abstract】 Castanea henryi plantation has differences in various growth stages. Accompanying the growth of age, economic and biomass yields have unanimous increasing tendency. The productivity reaches to 1.109 t/(hm 2·a), 3.823 t/(hm 2·a) and 8.9301 t/ (hm 2·a) respectively for three growing stages. LAI(leaf area index) gets to 1.9632 in initial full bearing stage, R value(relative growth rate) is higher in non bearing stage than in initial full bearing stage. NAR value(net assimilation rate) is the highest in initial bearing stage; and then it decreases which means it varies with the growth of tree crown.更多还原