Forest soils and carbon sequestration
Forest soils and carbon sequestration
复制标题
DOI：
10.1016/j.foreco.2005.08.015
复制
发表时间：
2005-12-10
影响因子：
3.7
通讯作者：
Lal, R
中科院分区：
文献类型：
--
作者：
Lal, R
与天然森林生态系统平衡的土壤具有高的碳（C）密度。土壤与植被碳密度的比值随纬度的增加而增加。土地利用的变化，特别是向农业生态系统的转变，消耗土壤碳储量。因此，退化的农业土壤具有低于其潜在容量的土壤有机碳（SOC）的股票。因此，农业土壤的造林和森林人工林的管理可以通过固碳提高SOC储量。土壤有机碳固存的速率、土壤碳储量的大小和质量取决于气候、土壤、树种和管理以及由优势树种决定的凋落物化学成分之间复杂的相互作用。增加森林生物量本身的生产不一定会增加SOC储量。火灾，自然的或管理，是一个重要的扰动，可以影响土壤碳储量很长一段时间后的事件。土壤碳储量可以大大提高了仔细的网站准备，充分的土壤排水，种植高NPP的物种，应用N和微量营养素（Fe）作为肥料或生物固体，并保持土壤和水资源。气候变化还可能通过增加矿物氮的可用性和通过CO2施肥效应刺激森林生长，这可能部分补偿土壤C的释放以应对变暖。土壤碳储量和碳通量的测量以及碳储量从土壤/地块尺度到区域和国家尺度的尺度研究取得了显著进展。北方和温带森林的土壤固碳可能是改善大气化学变化的重要策略。(c)2005 Elsevier B. V.保留所有权利。
Soils in equilibrium with a natural forest ecosystem have high carbon (C) density. The ratio of soil:vegetation C density increases with latitude. Land use change, particularly conversion to agricultural ecosystems, depletes the soil C stock. Thus, degraded agricultural soils have lower soil organic carbon (SOC) stock than their potential capacity. Consequently, afforestation of agricultural soils and management of forest plantations can enhance SOC stock through C sequestration. The rate of SOC sequestration, and the magnitude and quality of soil C stock depend on the complex interaction between climate, soils, tree species and management, and chemical composition of the litter as determined by the dominant tree species. Increasing production of forest biomass per se may not necessarily increase the SOC stocks. Fire, natural or managed, is an important perturbation that can affect soil C stock for a long period after the event. The soil C stock can be greatly enhanced by a careful site preparation, adequate soil drainage, growing species with a high NPP, applying N and micronutrients (Fe) as fertilizers or biosolids, and conserving soil and water resources. Climate change may also stimulate forest growth by enhancing availability of mineral N and through the CO2 fertilization effect, which may partly compensate release of soil C in response to warming. There are significant advances in measurement of soil C stock and fluxes, and scaling of C stock from pedon/plot scale to regional and national scales. Soil C sequestration in boreal and temperate forests may be an important strategy to ameliorate changes in atmospheric chemistry. (c) 2005 Elsevier B.V. All rights reserved.