Soil faunal effects on tree growth by control of detritus and mycohhrizal food chain

在森林土壤食物链的研究中，凋落物的分解一直被认为是土壤生态系统中养分和能量的主要来源，而我的研究表明了菌根和根衍生食物链的重要性。本研究的主要结果如下：1)采用微观测法和野外观测相结合的方法，估算了松树林土壤根源碳的相对重要性。根源碳占土壤呼吸总量的54%~75%。2)观察到千足虫的食土性，这种成虫的存在促进了土壤中的硝化作用，促进了钙、镁的活化。3)切断菌根吸引了弹尾目(FolSomia Canda)。这些结果表明，根源碳支持土壤微生物和食地土壤动物可以利用这些微生物作为食物来源。老化或死亡的菌根会被弹尾目食草动物吃掉，从而促进菌根真菌中保存的营养物质的循环。

In forest soil food chain studies, decomposition of leaf litter has been considered to be a primary source of nutrient and energy in soil ecosystems, whereas I showed that the importance of mycorrhizal and root derived food chain. Major results of this study are;1) Relative importance of root derived carbon has been estimated in pine-oak forest soil using combination of microcosm and field observation. Root derived carbon consisted 54 to 75 % of total soil respiration.2) Geophagy of a millipede (Parafontaria tonominea ATTEMS) has been observed, and the presence of the adults of this species in a soil enhanced nitrification and promoted Ca and Mg mobilization.3) Cutting mycorrhizal root attracted Collembola (Folsomia candida).These results suggest that root derived carbon support soil microorganisms and geophagous soil animals can utilize these microorganisms as food resource. Aged or dying mycorrhizal root will be consumed by Collembolan grazers, then it enhances the cycling of nutrient preserved in mycorrhizal fungi.