Abstract Quantifying the ability of plants to store atmospheric inorganic carbon (C) in their biomass and ultimately in the soil as organic C for long duration is crucial for climate change mitigation and soil fertility improvement. While many independent studies have been performed on the transfer of atmospheric C to soils for single crop types, the objective of this study was to compare the ability of crops, which are most commonly found worldwide, to transfer C to soils, and the associated controlling factors. We performed a meta-analysis of 227 research trials, which had reported C fluxes from plant to soil for different crops. On average, crops assimilated 4.5 Mg C ha−1 yr−1 from the atmosphere with values between 1.7 Mg C ha−1 yr−1, for barley (Hordeum vulgare) and 5.2 Mg C ha−1 yr−1 for maize (Zea mays). Sixty-one percent (61%) of the assimilated C was allocated to shoots, 20% to roots, 7% to soils while 12% was respired back into the atmosphere as autotrophic respiration by plants. Maize and ryegrass (Lolium perenne) had the greatest allocation to the soil (1.0 Mg C ha−1 yr−1 or 19% total assimilation), followed by wheat (Triticum aestivum). 0.8 Mg C ha−1 yr−1, 23%) and rice (Oryza Sativa, 0.7 Mg C ha−1 yr−1, 20%). Carbon allocation to the soil positively correlated to C allocation to roots (r = 0.33, P

中文翻译：

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增加土壤有机碳储量的作物——全球荟萃分析

摘要 量化植物将大气无机碳 (C) 储存在其生物量中并最终作为有机碳长期储存在土壤中的能力，对于减缓气候变化和提高土壤肥力至关重要。虽然已经对单一作物类型的大气碳向土壤转移进行了许多独立研究，但本研究的目的是比较世界范围内最常见的作物向土壤转移碳的能力，以及相关的控制因素。我们对 227 项研究试验进行了荟萃分析，这些试验报告了不同作物从植物到土壤的碳通量。平均而言，农作物从大气中同化了 4.5 Mg C ha−1 yr−1，大麦（Hordeum vulgare）的值介于 1.7 Mg C ha−1 yr−1 和玉米（Zea）的 5.2 Mg C ha−1 yr−1 之间。可能）。61% (61%) 被同化的碳分配给芽，20% 分配给根，7% 分配给土壤，而 12% 作为植物的自养呼吸被呼吸回大气。玉米和黑麦草 (Lolium perenne) 对土壤的分配最大（1.0 Mg C ha−1 yr−1 或 19% 总同化），其次是小麦（Triticum aestivum）。0.8 Mg C ha−1 yr−1, 23%) 和水稻（Oryza Sativa, 0.7 Mg C ha−1 yr−1, 20%）。土壤碳分配与根系碳分配正相关（r = 0.33，P 23%) 和水稻 (Oryza Sativa, 0.7 Mg C ha−1 yr−1, 20%)。土壤碳分配与根系碳分配正相关（r = 0.33，P 23%) 和水稻 (Oryza Sativa, 0.7 Mg C ha−1 yr−1, 20%)。土壤碳分配与根系碳分配正相关（r = 0.33，P