森林土壤有机层生化特性及其对气候变化的响应研究进展

森林土壤有机层是指累积在土壤表面未分解到完全分解的有机残余物质,在全球碳循环中具有十分重要的作用和地位.目前有关森林土壤有机层的生态研究主要集中于土壤有机层的凋落物储量、水土保持功能、生物多样性保育功能及其生化特性等,而有关其对气候变化响应的研究报道还相当少见,且已有的研究主要关于土壤有机层的碳源/汇动态等,有关森林土壤有机层生化特性对气候变化响应的研究还相对较少,这与其在全球气候变化中的作用和地位是极不相称的.过去10a中,有关土壤有机层生化特性对气候变化响应的研究主要包括土壤有机层的微生物数量、微生物生物量、呼吸作用、有机物质分解动态(凋落物分解)、酶活性等对环境变化的响应等方面.进一步的控制实验研究被认为是相当重要的.参51

Review on Biochemical Property in Forest Soil Organic Layer and Its Responses to Climate Change

Soil organic layer in forest can be defined as a layer of accumulated organic materials including freshly, fragmented and humified litters on the soil surface, which play a key role in the global carbon cycle. In recent 10 years, the studies on forest soil organic layer have mainly focused on microbial counts, microbial biomass, carbon, nitrogen, phosphorus and sulfur, respiration, litter decomposition dynamics and enzymatic activity of this layer to the changing environment. However, the past studies have paid greater attention to litter stock, soil and water conservation, biodiversity nursing, biochemical property, and carbon source/sink dynamics, and biochemical property of this layer, and the responses of biochemical property in the soil organic layer to climate change were not well known, which made difficult to understand the climate change. It needs further study on the responses of biochemical property in soil organic layer to climate change. Ref 51