Spatiotemporal distribution of aboveground litter in a Cryptomeria japonica plantation
Spatiotemporal distribution of aboveground litter in a Cryptomeria japonica plantation
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DOI：
10.1007/s10310-006-0235-6
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发表时间：
2006-12
影响因子：
1.5
通讯作者：
Tomohiro Yoshida;N. Hijii
中科院分区：
文献类型：
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作者：
Tomohiro Yoshida;N. Hijii
我们研究了33年生日本雪松人工林中凋落物的垂直分布及其在林冠和林地(土壤)上的季节格局，以及凋落物(凋落物从树冠到土壤的通量)。唐)。树冠上的大量垃圾、枯叶和枯枝。−-1的平均干重分别为34.09t、19.53t和14.56t，在研究期间几乎保持不变。连续两年的年凋落物总质量分别为4.17t/−和5.88t/hm2·1年−·1a。同期土壤凋落物质量平均为7.95t/hm2·−。冠层凋落物质量与树体大小参数(胸径和最低活枝直径)呈对数线性回归关系。与幼龄阶段(16年生)的结果相比，我们的结果表明，每棵树上附着的枯叶总质量随着树龄的增加而显著增加，但随着林龄的增加，这种增加的轨迹可能会从指数曲线变为饱和曲线。
We assessed the vertical distribution of litter and its seasonal patterns in the canopy and on the forest floor (soil), as well as litterfall (the flux of litter from the canopy to the soil) in a 33-year-old plantation of Japanese cedar (Cryptomeria japonicaD. Don). The masses of total litter, dead leaves, and dead branches in the canopy ofC. japonicatrees averaged 34.09, 19.53, and 14.56 t dry wt ha−1, respectively, and were almost constant during the study period. The total masses of the annual litterfall were 4.17 and 5.88 t dry wt ha−1year−1in the two consecutive years of the study. The mass of the soil litter averaged 7.95 t dry wt ha−1during the same period. All relationships between the mass of canopy litter and tree-size parameters (diameters at breast height and at the lowest living branch) were linear in a log-linear regression. Compared with the results for this plantation at a younger stage (16 years old), our results suggest that the total mass of dead leaves attached to each tree increases markedly with increasing age, but that the trajectory of this increase as a function of tree size may change from an exponential to a saturation curve with increasing stand age.