Wang Xiao-Feng, Wang Si-Long, Zhang Wei-Dong
State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China.
Ying Yong Sheng Tai Xue Bao. 2013 Sep;24(9):2393-8.
By using 13C stable isotope tracer technique, this paper studied the effects of Chinese fir litter addition on the soil organic carbon (SOC) decomposition, microbial biomass carbon, and dissolved organic carbon in 0-5 cm and 40-45 cm layers. The decomposition rate of SOC in 40-45 cm layer was significantly lower than that in 0-5 cm layer, but the priming effect induced by the Chinese fir litter addition showed an opposite trend. The Chinese fir litter addition increased the soil total microbial biomass carbon and the microbial biomass carbon derived from native soil significantly, but had less effects on the soil dissolved organic carbon. Turning over the subsoil to the surface of the woodland could accelerate the soil carbon loss in Chinese fir plantation due to the priming effect induced by the litters.
采用¹³C稳定同位素示踪技术，研究了添加杉木凋落物对0-5 cm和40-45 cm土层土壤有机碳（SOC）分解、微生物生物量碳和溶解有机碳的影响。40-45 cm土层SOC的分解速率显著低于0-5 cm土层，但添加杉木凋落物引起的激发效应呈现相反趋势。添加杉木凋落物显著增加了土壤总微生物生物量碳和源自原生土壤的微生物生物量碳，但对土壤溶解有机碳的影响较小。由于凋落物引起的激发效应，将心土翻至林地表面会加速杉木人工林土壤碳损失。
