黑石顶自然保护区马尾松种群呼吸量研究

报道了粤西黑石顶自然保护区马尾松林中马尾松种群的呼吸量。根据马尾松的特点 ,利用便携式CID-51 0光合系统与自制呼吸装置 ,分别测定了叶和各非同化器官不同径级的呼吸速率。在确定非同化器官直径频度分布函数和建立呼吸速率与径级的相互关系基础上 ,计算出单株林木各器官的呼吸量与林木大小的关系 ,最后结合“每木调查”推算出种群的总呼吸量。结果表明 :马尾松种群的全年呼吸量为 57.868t· CO2 hm- 2 a- 1 其中干、枝、根、叶分别为吸量为 4 .4 49,4 .695,6.868,4 1 .855t· CO2 hm- 2 a- 1 ,叶所占比例最高 ,约为总量的 72 .33% ,其他器官各约为 7.69%～ 1 1 .87%。

Studies on respiration of Pinus massoniana in Heishiding Natural Reserve

Respiration amount of Pinus rnassoniana in Heishiding Natural Reserve in western Guangdong was described in details in this paper. Based on the morphological features of trees, helped by the portable CID-510 Photosynthesis System and Self-made Respiration Apparatus, Respiration rates of leaf and non-assimilation or gans (stem, branch and root) in different diameter were measured, and the appropriate relationships between diameter class and length, between the respiration rate and the diameter of woody organs, the equations for estimating the population respiration were established. They were used to estimate the population respiration, and the result showed that the annual population respiration amount was 57. 868 t·COs hm-2 a-1 , of which the stem 4.449, the branch 4.695, the root 6. 868, the leaf 41. 855 t·CO, hm-2 a-1. the respiration amount of the leaf was the highest accounting for 72.330%, of the other woody organs were lower only accounting for 7.69%～11.87%.