Potassium, calcium, and magnesium dynamics during litter decomposition in a cool temperate forest
Potassium, calcium, and magnesium dynamics during litter decomposition in a cool temperate forest
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DOI：
10.1007/s10310-003-0047-x
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发表时间：
2004-02-01
影响因子：
1.5
通讯作者：
Takeda, Hiroshi
中科院分区：
文献类型：
--
作者：
Osono, Takashi;Takeda, Hiroshi
在日本冷温带森林的森林斜坡的上部和下部，对 14 种凋落物类型在 3 年时间内分解过程中 K、Ca 和 Mg 的动态进行了研究。钾动态分为浸出初期和浸出后期。初始阶段的初始 K 浓度与初始阶段 K 浓度的下降速率相关。后期的特点是浓度的季节性波动：K 浓度在 4 月至 11 月期间增加，在冬季期间减少。一些窝类型的Ca浓度变化模式分为初始增加期和后期减少期，或仅在其他窝中由后期组成。对于初始阶段钙浓度的变化模式和钙浓度的变化率，初始窝的钙浓度是不可预测的。后期的初始 Ca 浓度与后期 Ca 浓度的变化率相关。 Mg浓度变化模式分为浸出初期和固定后期。初始阶段的初始 Mg 浓度与初始阶段期间 Mg 浓度的变化率相关。在下位点，后期的初始 Mg 浓度与后期 Mg 浓度的变化率相关，而在上位点没有观察到这种关系。 K、Ca 和 Mg 的浓度在研究期结束时呈现收敛趋势。上位点和下位点的最终浓度不同。
The dynamics of K, Ca, and Mg were investigated during the decomposition of 14 litter types over a 3-year period on the upper and lower parts of a forest slope in a cool temperate forest in Japan. Potassium dynamics were divided into initial leaching phase and late phase. Initial K concentrations for the initial phase were correlated with the rate of decrease in K concentration during the initial phase. The late phase was characterized by seasonal fluctuations in concentration: K concentration increased from April to November and decreased during the winter period. The pattern of change in Ca concentration was divided into initial increase phase and late decrease phase in some litter types, or consisted of the late phase only in other litters. Calcium concentration of the initial litter was not predictable for the pattern of change in Ca concentration nor the rate of change in Ca concentration during the initial phase. Initial Ca concentration for the late phase was correlated with the rate of change in Ca concentration during the late phase. The pattern of change in Mg concentration was divided into initial leaching phase and late immobilization phase. Initial Mg concentration for the initial phase was correlated with the rate of change in Mg concentration during the initial phase. At the lower site, initial Mg concentration for the late phase was correlated with the rate of change in Mg concentration during the late phase, while such a relationship was not observed at the upper site. Concentrations of K, Ca, and Mg showed a convergent trend at the end of the study period. The final concentration differed between the upper and lower sites.