摘要
对广东省丰顺县不同林龄桉树人工纯林开展研究,旨在阐明桉树林龄的变化对其固碳放氧量的影响。结果表明:桉树人工林平均树高、胸径和公顷蓄积随着林龄增长均有所增加。1～6 a桉树人工林的保存率由95%逐步降低至90%;桉树各器官生物量随着年龄增长均增加,但各器官生物量所占比例却有不同的变化趋势。1～6年生桉树各器官生物量按大小排序均为:树干>树根>树皮>树枝>树叶;随着林龄的增长,桉树吸收CO_2量、放氧量以及碳储量均逐年增加,在前5 a碳储量平均增量为5.7 kg,生长较快,第6 a碳储量仅增加1.9 kg,增长速度出现变缓趋势。
The study on eucalypt plantations of different ages in Fengshun county of Guangdong Province aimed to clarify how stand age affects eucalypt carbon fixation and oxygen release. The results showed that： average height, DBH and volume per hectare increased with stand age. Conservation of the eucalypt planta- tion aged 1 to 6 years decreases from 95% to 90%. Secondly, the biomass of Euca/yptus organs increased with stand age, while various organs have different variable trends. The biomass of organs of Euca/yptus aged 1 to 6 years in descending order of magnitude was： stems, roots, barks, branches and leaves. The amount of carbon dioxide absorbed, oxygen released and carbon stored by Euca/yptus was also found to increase with age. The average increment of carbon storage in the In＇st five years was 5.7 kg, which showed a fast growth trend, but then slowed down with the increment of carbon storage to only 1.9 kg by the sixth year.
出处
《桉树科技》
2013年第1期32-35,共4页
Eucalypt Science & Technology
关键词
固碳放氧量
林龄
桉树
广东丰顺
Carbon fLxafion and oxygen release
stand age
Euca/yptus
Fengshun county of Guangdong
