Annual differences in quality of leaf litter of aspen (Populus tremuloides) affecting rates of decomposition
Annual differences in quality of leaf litter of aspen (Populus tremuloides) affecting rates of decomposition
复制标题
白杨（欧洲山杨）落叶质量的年度差异影响分解率
DOI：
--
复制
发表时间：
1988
期刊：
影响因子：
--
通讯作者：
D. Parkinson
中科院分区：
文献类型：
--
作者：
B. R. Taylor;D. Parkinson
1981 年至 1984 年每年秋天，我们都会从阿尔伯塔省落基山脉的白杨林中收集新鲜掉落的落叶。1981 年和 1982 年的叶子呈黄色、蜡质且坚固。 1983年的叶子呈淡棕色，非常脆，几乎有1%的叶子出现对称畸形。 1984年的叶子由80%黄叶和20%绿叶组成，在衰老前明显脱落。 1984 年的绿色和黄色叶子在总浸出损失（3 天）、浸出液电导率以及灰分、纤维素和不稳定材料的比例方面明显不同。 1984 年绿色叶子的氮含量是黄色叶子的两倍（13.1 vs. 6.5 mg∙g−1），磷含量明显更高（1.6 vs. 1.3 mg∙g−1）。不同年份的叶片在叶质量、吸水率、渗滤液质量和电导率以及纤维素、挥发物、木质素和灰分的比例等方面存在较大差异，但年份之间没有一致的排序；的叶子...
Freshly fallen leaf litter was collected from a stand of trembling aspen (Populus tremuloides Michx.) in the Rocky Mountains of Alberta each autumn from 1981 through 1984. Leaves from 1981 and 1982 were yellow, waxy, and strong. Leaves from 1983 were pale brown and very brittle, and almost 1% of them suffered symmetrical deformities. Leaves from 1984 were composed of 80% yellow leaves and 20% green leaves, which apparently abscissed before senescence. Green and yellow 1984 leaves were distinctly different with respect to total (3 days) leaching loss, leachate conductivity, and proportions of ash, cellulose, and labile material. Green 1984 leaves contained twice as much nitrogen as yellow ones (13.1 vs. 6.5 mg∙g−1) and significantly more phosphorus (1.6 vs. 1.3 mg∙g−1). Leaves of different years varied widely with respect to leaf mass, water absorption rate, mass and conductivity of leachate, and proportions of cellulose, labiles, lignin, and ash, but there was no consistent ordering among years; leaves of...