作　　者： ; ;

机构地区： 厦门大学生命科学学院生物学系

出　　处： 《海洋与湖沼》 1995年第1期28-33,共6页

摘　　要： 于1986年冬—1989年秋在福建省九龙江口，连续3年分季节进行红树植物秋茄落叶在林地滩面的分解实验，并在室内测定其落叶和腐叶的可溶性物质含量，定量探讨淋溶在落叶分解失重中的潜在作用。结果表明，可溶性物质平均占落叶干重的27．26％，这些可溶性物质中的87％在分解初期的快速淋溶阶段迅速损失，可导致落叶初始于重损失24％。快速淋溶阶段持续时间平均分别是，春季36d夏季，13d秋季，17d；冬季，56d：大约相当于5／7的落叶半分解时间。淋溶速率随温度的上升而显著提高．这些说明，淋溶不仅引起秋茄落叶在分解初期失重快，而且也引起季节间分解速率的差异，即在分解初期季节间差异大，后期差异小。 The 1986-1989 seasonal in situ decomposition of mangrove, Kandelia candel(L.) druce, leaf litter in Jiulongjiang River Estuary, Fujian, was observed. The content of soluble matter in freshly fallen and decayed leaves was measured. In orderto quantitatively evaluate the potential role of leaching in the process of weightlossduring decomposition of leaf litter.The results showed that there was a mean of 27.26 % DW of soluble matter inthe freshly fallen leaves, which was rapidly leached out during the early stage ofdecomposition. The process of leaching could be divided into three stages: fast stage, relatively stable stage and extensive stage. In the fast leaching stage, about 87 %of original soluble matter was lost, giving rise to a loss of 24 % of the initial leafdry weight. The duration of the fast leaching stage, which considerably decreaseswith increasing water temperature, was average of 36d in spring, 13d in summer,17d in autumn and 56d in winter, roughly equivalent to 5/7 of the half-time ofleaf decolnposition. Therefore, leaching was evidently responsible for both the rapidloss of leaf dry weight and the most significant differences between seasonal decomposition rates in the early decomposition stage.

关 键 词： 红树林 秋茄 落叶 分解 淋溶 失重

领　　域： [生物学]