Abstract The fate of litter is regulated by its quality and quantity, the activity of soil microorganisms and edaphic conditions. Despite edaphic conditions differing between topsoils and subsoils in availability of water and oxygen, nutrient content and microbial activity, the effects of soil depth on litter decomposition are seldom investigated. The present work studied the mineralization of beech leaf litter (C/N = 28, collected after litterfall) and fine roots ((C/N = 45, taken from living trees) in two soil depths (2–10 cm vs 145–153 cm). Both plant materials were air-dried, cut to The cumulative CO2 emission from leaf decomposed in the subsoil (400–450 mg C g−1 soil) was 1.6 times higher than from the roots (p 0.05). In contrast, subsoil MBC was higher after leaf addition than root addition (750 vs. 200 mg kg−1 soil, p

中文翻译：

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沙质 Cambisol 表土和底土中山毛榉叶和根的分解：一年培养的结果

摘要 凋落物的命运受其质量和数量、土壤微生物的活性和土壤条件的调节。尽管表土和底土的土壤条件在水和氧气的可用性、养分含量和微生物活动方面有所不同，但很少研究土壤深度对凋落物分解的影响。目前的工作研究了山毛榉落叶物（C/N = 28，凋落物后收集）和细根（（C/N = 45，取自活树）在两种土壤深度（2-10 厘米与 145-153 cm). 两种植物材料都被风干，切割到底土（400-450 mg C g-1 土壤）中分解的叶子的累积二氧化碳排放量是根的 1.6 倍（p = 0.05）。相比之下，添加叶后下土 MBC 高于添加根（750 与 200 mg kg−1 土壤，p