讀書報告4_土壤碳固定對全球氣候變化和糧食安全的影響(已修改)
2025-01-30 20:07 本頁面
【正文】 Soil Carbon Sequestration Impacts on Global Climate Change and Food Security Tutor : Prof . ZHENG Speaker : DongXiaogang Date : 20220510 R. Lal ,et al. 2022 Science 304, 1623 土壤碳固定對全球氣候變化和糧食安全的影響 Carbon Sequestration Carbon Sequestration for Mitigating Climate Change Carbon Sequestration and Global Food Security Content The global soil carbon (C) pool of 2500 gigatons (Gt) includes about 1550 Gt of soil anic carbon (SOC) and 950 Gt of soil inanic carbon (SIC). The soil C pool is times the size of the atmospheric pool (760 Gt) and times the size of the biotic pool (560Gt, fig. S1). 25000億噸的全球土壤碳庫由 15500億噸的土壤有機碳和 9500億噸的土壤無機碳組成。 土壤碳庫的容量是大氣碳庫的 ，是生物碳庫的 。 Fig. 1. Processes affecting soil anic carbon (SOC) dynamics. The SOC pool represents a dynamic equilibrium of gains and losses (Fig. 1). 土壤碳庫處于收支動態(tài)平衡。 Severe depletion of the SOC pool degrades soil quality, reduces biomass productivity, and adversely impacts water quality, and the depletion may be exacerbated by projected global warming. The depletion is exacerbated when the output of C exceeds the input and when soil degradation is severe. 當輸出超過輸入和土壤退化嚴重時土壤碳庫的耗竭將加劇。 土壤碳庫的嚴重耗竭使得土壤質量退化，生物產(chǎn)量降低，影響水質量，預測的全球變暖可能會加劇土壤碳庫的耗竭。 The estimates of historic SOC loss range widely, from 44 to 537 Gt, with a mon range of 55 to 78 Gt (3). 以往的土壤有機碳的損失量的估算值變化范圍廣大約從 440到5370億噸，而共識的損失量是550到 780億噸。 Carbon Sequestration Carbon sequestration implies transferring atmospheric CO2 into longlived pools and storing it securely so it is not immediately reemitted. Thus, soil C sequestration means increasing SOC and SIC stocks through judicious land use and remended management practices (RMPs). 土壤碳固定意味著將大氣中的 CO2轉移到長期存在的土壤庫中并安全地儲存它，因此使碳不能立即釋放到大氣中。因此土壤碳固定意味著通過精確的土地使用和推薦的管理措施 (RMPs)增加了土壤有機和無機碳庫的容量。 The SOC sequestration is caused by those management systems that add high amounts of biomass to the soil, cause minimal soil disturbance, conserve soil and water, improve soil structure, enhance activity and species diversity of soil fauna, and strengthen mechanisms of elemental cycling (Fig. 2, table S2). 土壤有機碳的固定是由向土壤中增加高生物量，使土壤受到最小的擾動，保持水土，提高土壤結構，增強土壤動物的種類和多樣性的活性，增強元素循環(huán)而實現(xiàn)的。 (Fig. 2, table S2) Carbon Sequestration Fig. 2. 具有高的土壤碳固定潛能的態(tài)系
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