Decomposition of aspen, spruce, and pine boles on two sites in Minnesota
Decomposition of aspen, spruce, and pine boles on two sites in Minnesota
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明尼苏达州两个地点的白杨、云杉和松树干的分解
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
J. Pastor
中科院分区：
文献类型：
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作者：
D. Alban;J. Pastor
白云杉(Picaglauca(Motch)Voss)、红松(Pinusresinosa Ait.)、短叶松(Pinusbansiana Lamb.)腐烂11-17年后取样。测定了其质量损失和化学成分的变化。密度降低40-73%，分解常数(K)由大到小依次为：杨树 >； 云杉 >； 红松 >； 杰克松。虽然分解速率强烈地依赖于物种，但在两个地点之间没有区别。分解常数与原茎中木质素和磷的浓度呈弱相关(R2 = 分别为0.44和0.49)，与原茎中的氮素浓度相关性不显著。在分解过程中，养分浓度增加，尤其是氮和磷。分解过程中氮含量增加，钾含量降低。钙、镁含量在分解过程中变化不大，而磷含量的增加或减少取决于腐解过程中的环境因素。
Boles of quaking aspen (Populustremuloides Michx.), white spruce (Piceaglauca (Moench) Voss), red pine (Pinusresinosa Ait.), and jack pine (Pinusbanksiana Lamb.) were sampled after decomposing for 11–17 years. Mass loss and changes in chemical composition were determined. Density decreased by 40–73%, and the decomposition constant (k) decreased in the order aspen > spruce > red pine > jack pine. Although the decomposition rate was strongly species dependent, it did not differ between the two sites. The decomposition constant was weakly related to lignin and phosphorus concentration in the original stems (r2 = 0.44 and 0.49, respectively) and not significantly related to original nitrogen concentrations. Nutrient concentration increased during decomposition, particularly for nitrogen and phosphorus. Nitrogen content increased during decomposition, and potassium content decreased. Calcium and magnesium content changed little during decomposition, whereas phosphorus content increased or decreased, depending ...