Production and consumption of ethylene in temperate volcanic forest surface soils
Production and consumption of ethylene in temperate volcanic forest surface soils
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DOI：
10.1111/j.1365-2389.2006.00852.x
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发表时间：
2007-06
影响因子：
4.2
通讯作者：
Xingkai Xu;K. Inubushi
中科院分区：
文献类型：
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作者：
Xingkai Xu;K. Inubushi
到目前为止，我们的知识是有限的，关于乙烯（C2 H4）在温带森林土壤含有火山灰的循环，以及森林果园转换对其循环的影响。通过好氧培养和缺氧培养研究了乙烯在森林土壤中的积累，沿着葡萄糖对土壤C2 H4积累的促进作用。我们还研究了抗生素和高压灭菌对C2 H4的生产和消费的火山森林土壤，和C2 H4和CH 4在表层土壤中的循环后，日本雪松林转化为果园的影响。森林表层土壤乙烯的产生和消耗是微生物过程的结果，土壤中链霉素敏感细菌的贡献很小。缺氧条件下土壤中C2 H4的积累量远大于好氧条件下的积累量，说明缺氧条件下森林土壤中C2 H4的积累量较大。添加葡萄糖作为碳源可以显著增加培养第一周内缺氧和好氧森林土壤中C2 H4的积累速率。然而，缺氧培养35天后，改良和未处理土壤中的总C2 H4积累没有差异。结果表明，在缺氧培养2周后，林地和果园下0- 5cm和5-10 cm土壤的乙烯释放速率最大，此时土壤CH 4释放量开始急剧增加，随后受到强烈抑制。在短期缺氧培养过程中，林-果园转换对表层土壤CH 4的产生影响不大，但显著降低了土壤C2 H4的产生。转化还显著降低了土壤CH 4和C2 H4的消耗量，且前者的消耗量大于后者。土壤性质如全碳、水溶性有机碳和pH值对0-5 cm和5-10 cm土壤中C2 H4的消耗和产生都有贡献，并且土壤中CH 4和C2 H4消耗之间存在平行关系，这表明存在类似的微生物。原位表层高地土壤的长期缺氧条件通常不普遍，因此可以合理地得出结论，在强降雨后，森林和果园下的表层土壤中，特别是森林下，有更大的C2 H4积累，而不是CH 4积累。
To date our knowledge is limited with regard to the cycling of ethylene (C2H4) in temperate forest soils containing volcanic ash, and the effect of forest‐to‐orchard conversion on its cycling. We studied ethylene accumulation in such forest soils by oxic and anoxic incubations, along with the stimulatory effect of glucose addition on soil C2H4 accumulation. We also studied the effect of antibiotics and autoclaving on C2H4 production and consumption by volcanic forest soils, and the cycling of C2H4 and CH4 in surface soils after conversion of a Japanese cedar forest to an orchard. Ethylene production and consumption by forest surface soils results from a microbial process, and soil streptomycin‐sensitive bacteria make a minor contribution. Soil C2H4 accumulation was much larger during anoxic than during oxic incubation, which indicates that anoxic conditions can induce C2H4 accumulation in forest soils. Glucose addition as a carbon source can sharply increase C2H4 accumulation rates in the anoxic and oxic forest soils during the first week of incubation. However, there was no difference in total C2H4 accumulation in the amended and non‐treated soils after 35 days of anoxic incubation. Ethylene production of the 0–5 cm and 5–10 cm soils beneath forest and orchard showed the greatest rate after 2 weeks of anoxic incubation when soil CH4 production started to increase sharply, and later it was strongly suppressed. The forest‐to‐orchard conversion showed little influence on the CH4 production of surface soils during short‐term anoxic incubation, but significantly reduced soil C2H4 production. The conversion also significantly decreased the consumption of soil CH4 and C2H4, the former more than the latter. Soil properties such as total C, water‐soluble organic C and pH contribute to the consumption and production of C2H4 in the 0–5 cm and 5–10 cm soils, and there are the parallels between CH4 and C2H4 consumption in soils, which suggests the presence of similar microorganisms. Long‐term anoxic conditions of in situ surface upland soils are normally not prevalent, so it can be reasonably concluded that there is a larger C2H4 accumulation rather than CH4 accumulation in surface soils beneath forest and orchard after heavy rainfall, especially beneath forest.