In this study, cover crop residue management as a strategy to identify agricultural practices suitable for increasing soil carbon (C) storage and contributing to the mitigation of CO₂ in a cover crop–eggplant sequence was evaluated. The treatments applied were: (a) four winter managements [three cover crops (hairy vetch, oat and oilseed rape) and a bare soil]; and (b) three residue managements [residues incorporated into the soil at a depth of 0.3 m as deep tillage (DT), residues incorporated into the soil at a depth of 0.1 m as shallow tillage (ST), and residues left on soil surface (RS)]. Eggplant biomass and C content, soil CO₂ flux, soil temperature and moisture were measured. Hairy vetch under DT showed the highest emission rate during the eggplant cultivation. At eggplant harvest time, CO₂–C emissions were high in hairy vetch, intermediate in oat and oilseed rape, and low in bare soil (5.4, 4.2 and 3.3 Mg ha⁻¹, respectively). Among residue managements, CO₂–C emissions were higher in ST and DT than in RS (4.5 vs. 3.7 Mg ha⁻¹, respectively). Despite contributing to the highest soil CO₂ flux, the decomposition of hairy vetch residues supports the production of eggplant crop, as it is shown by the carbon input/output ratio, especially under RS conditions representing a temporary sink of CO₂–C. As a system, hairy vetch RS is the most productively sustainable because it is simultaneously yielding the high eggplant crop biomass and retaining C residues in the soil.

中文翻译：

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基于覆盖作物残茬管理的茄子土壤二氧化碳排放量

在这项研究中，评估了农作物覆盖物残留管理作为确定适合增加土壤碳（C）储存并有助于缓解农作物-茄子序列中CO _2的农业实践的策略。所采用的处理方法是：（a）四种冬季管理措施（三种农作物（多毛紫菜，燕麦和油菜）和裸露的土壤）；（b）三种残留物管理方法[深度耕作（DT）进入土壤深度为0.3 m的残留物，深度耕作（ST）进入土壤深度为0.1 m的残留物，残留在土壤表面（RS）]。茄子生物量和碳含量，土壤CO ₂测定通量，土壤温度和湿度。DT下有毛v子在茄子栽培过程中表现出最高的排放速率。在茄子收获时，有毛v子的CO ₂ -C排放较高，燕麦和油菜的中等，而裸露土壤的CO ₂ -C排放较低（分别为5.4、4.2和3.3 Mg ha ^-1）。在残留物管理中，ST和DT的CO ₂ -C排放量比RS高（分别为4.5和3.7 Mg ha ^-1）。尽管产生了最高的土壤CO ₂通量，但是多毛紫菜残留物的分解仍支持茄子作物的生产，正如碳输入/输出比所表明的那样，尤其是在代表CO ₂暂时下沉的RS条件下。-C。作为一个系统，多毛紫菜RS具有最高的生产力，因为它可同时产生高茄子作物生物量并在土壤中保留C残留物。