Humus Components and Soil Biogenic Structures in Norway Spruce Ecosystems
Humus Components and Soil Biogenic Structures in Norway Spruce Ecosystems
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DOI：
10.2136/sssaj2006.0317
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发表时间：
2008-03
影响因子：
2.9
通讯作者：
Paola Galvan;Jean-François Ponge;S. Chersich;A. Zanella
中科院分区：
文献类型：
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作者：
Paola Galvan;Jean-François Ponge;S. Chersich;A. Zanella
Oa和A层的结构是否根据动物活动而变化仍然是一个猜测问题，特别是在amphi中，这是一种腐殖质形式，具有冷热和现代的混合特征，在具有强烈季节对比的环境中被描述过。云杉（Picea abies）的Oa和A视界岩溶。对意大利特伦托省（Trento Province of Trento）的6个地点的134个腐殖质剖面进行了采样，这些剖面包含了该地区高山地区普遍存在的各种母岩、气候和植被条件。采用光学法测定腐殖质组分（植物残骸、根系、动物粪便和矿物质）的分布，并用对应分析（CA）进行分析。现代腐殖质形态以内生虫活性为特征，在Oa层和A层分别伴有有机和矿物-有机粪便沉积。相反，双足足的特征。有机质和矿-有机蚯蚓粪便分别在Oa层和A层同时沉积。我们得出结论，现代动物和两栖动物的Oa和A层仅在动物粪便中矿物质含量上存在定量差异。在安菲斯的A层中主要发现的细粒矿物有机结构源于。小附生蚯蚓的消化活动，它把有机物和矿物质混合在一起，就像蚯蚓在蚯蚓体内所做的那样。
Whether the structure of Oa and A horizons varies according to animal activity is still a matter of conjecture, especially in amphi, a humus form with mixed features of mull and moder, which has been described in environments with strong seasonal contrasts. The Oa and A horizons of spruce [Picea abies (L.) Karst.] coniferous forests of the Province of Trento (Italy) were sampled in six sites with a total of 134 humus profiles along transect lines, embracing the variety of parent rocks, climate, and vegetation conditions that prevail at the upper montane level in this region. The distribution of humus components (plant debris, roots, animal feces, minerals) was assessed by an optical method and analyzed with correspondence analysis (CA). Moder humus forms were characterized by enchytraeid activity, with concomitant deposition of organic and mineral-organic feces in Oa and A horizons, respectively. Conversely, amphis were characterized. by the concomitant deposition of organic and mineral-organic earthworm feces in Oa and A horizons, respectively. We conclude that Oa and A horizons of moders and amphis differed only quantitatively in the content of mineral matter in animal feces. The fine-grained mineral-organic structure that is mostly found in the A horizon of amphis results from. the alimentary activity of small epigeic earthworms that mix organic matter with mineral matter, like anecic earthworms do in mulls.