【摘要】 [目的]探究高密植对巨尾桉生长量及生物量的影响。[方法]对桉树连栽迹地6年生巨尾桉高密植林(3 333株/hm~2)、对照林(1 667株/hm~2)的生长量和生物量进行分析。[结果]高密植林的平均树高、平均胸径、单株材积比对照林的小14.1%、19.6%、42.1%,但单位面积蓄积量比对照林的大11.3%;胸径分级中,密植林胸径<14 cm所占比例比对照林的大37.98%;树高分级中,密植林树高≥16.1 m所占比例比对照林的小34.70百分点;密植林的乔木层生物量比对照林大23.57 t/hm~2,林下灌草层和枯落物层的生物量比对照林的少1.40 t/hm~2,总生物量比对照林大22.17 t/hm~2。[结论]连栽迹地上营造桉树密植林有利于蓄积量和生物量的积累,适合发展为纸浆林和生物质能源林。更多还原

【Abstract】 [Objective]To study effects of high density forest planting on growth and biomass of Eucalyptus urophylla.[Method]The growth and biomass of a 6-year old Eucalyptus grandis high density forest(3 333 plants/hm~2) and a control forest(1 667 plants/hm~2) were analyzed.[Result]The results showed that the average tree height, average DBH and individual volume of high density forest were 14.1%,19.6% and 42.1% lower than those of the control forest, but the total volume was 11.3% larger than that of the control forest.In DBH classification, the proportion of DBH<14 cm in high density forest was 37.98% higher than that in control forest.In the classification of tree height, the proportion of high density forest with tree height ≥16.1 m was 34.70% less than that of the control forest.The biomass of tree layer in high density forest was 23.57 t/hm~2 larger than that of control forest, the biomass of undergrowth shrub layer and litter layer was 1.40 t/hm~2 less than that of control forest, and the total biomass was 22.17 t/hm~2 larger than that of control forest.[Conclusion]The results indicated that the high density eucalyptus forest was beneficial to the accumulation of wood volume and biomass, which was suitable for the development of pulp forest and biomass energy forest.更多还原