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Soil organic carbon formation efficiency from straw/stover and manure input and its drivers: Estimates from long‐term data in global croplands
Global Change Biology ( IF 10.8 ) Pub Date : 2024-08-13 , DOI: 10.1111/gcb.17460 Yulong Yin 1 , Zhong Chen 1 , Haiqing Gong 1 , Kai He 1 , Qi Miao 1 , Xingshuai Tian 1 , Zihan Wang 1 , Yingcheng Wang 1 , Huifang Zheng 2 , Zhenling Cui 1
Global Change Biology ( IF 10.8 ) Pub Date : 2024-08-13 , DOI: 10.1111/gcb.17460 Yulong Yin 1 , Zhong Chen 1 , Haiqing Gong 1 , Kai He 1 , Qi Miao 1 , Xingshuai Tian 1 , Zihan Wang 1 , Yingcheng Wang 1 , Huifang Zheng 2 , Zhenling Cui 1
Affiliation
New soil organic carbon (SOC) formation in cropland from straw/stover or manure input is a vital source of SOC for climate change mitigation. However, location and variations in the efficiency, specifically the ratio of new SOC formation to organic C input (NCE), remain unquantified globally. In this study, the spatial variability of cropland NCE from straw/stover or manure input and explanatory factors were determined by analyzing 897 pairs of long‐term field measurements from 404 globally distributed sites and by mapping grid‐level cropland NCEs. The global NCE for paddy and upland averaged 13.8% (8.7%–25.1%, 5th–95th percentile) and 10.9% (6.8%–17.3%), respectively. The initial SOC and the clay content of soil, rather than temperature, were the most important factors regulating NCE. A parabola with an apex at approximately 17 g kg−1 between the initial SOC and NCE was resolved, and a positive correlation between soil clay content and NCE was observed. High‐resolution mapping of the global NCE derived from manure/straw and insight into NCE dynamics provide a benchmark for diagnosing cropland soil C dynamics under climate change and identifying priority regions and actions for C management.
中文翻译:
秸秆/秸秆和粪便输入的土壤有机碳形成效率及其驱动因素:全球农田长期数据的估计
农田中由秸秆/秸秆或粪肥输入形成的新土壤有机碳 (SOC) 是减缓气候变化的重要 SOC 来源。然而,效率的位置和变化,特别是新的 SOC 形成与有机碳输入 (NCE) 的比率,在全球范围内仍然无法量化。在本研究中,通过分析来自 404 个全球分布地点的 897 对长期实地测量数据并绘制网格级农田 NCE,确定了秸秆/秸秆或粪肥输入的农田 NCE 的空间变异性和解释因素。全球水稻和旱地的 NCE 平均分别为 13.8%(8.7%–25.1%,第 5–95 个百分位数)和 10.9%(6.8%–17.3%)。初始SOC和土壤粘土含量,而不是温度,是调节NCE的最重要因素。顶点约为 17 g kg 的抛物线−1解决了初始SOC和NCE之间的关系,并且观察到土壤粘土含量和NCE之间存在正相关关系。源自粪便/秸秆的全球 NCE 高分辨率绘图以及对 NCE 动态的深入了解为诊断气候变化下农田土壤碳动态以及确定碳管理的优先区域和行动提供了基准。
更新日期:2024-08-13
中文翻译:
秸秆/秸秆和粪便输入的土壤有机碳形成效率及其驱动因素:全球农田长期数据的估计
农田中由秸秆/秸秆或粪肥输入形成的新土壤有机碳 (SOC) 是减缓气候变化的重要 SOC 来源。然而,效率的位置和变化,特别是新的 SOC 形成与有机碳输入 (NCE) 的比率,在全球范围内仍然无法量化。在本研究中,通过分析来自 404 个全球分布地点的 897 对长期实地测量数据并绘制网格级农田 NCE,确定了秸秆/秸秆或粪肥输入的农田 NCE 的空间变异性和解释因素。全球水稻和旱地的 NCE 平均分别为 13.8%(8.7%–25.1%,第 5–95 个百分位数)和 10.9%(6.8%–17.3%)。初始SOC和土壤粘土含量,而不是温度,是调节NCE的最重要因素。顶点约为 17 g kg 的抛物线−1解决了初始SOC和NCE之间的关系,并且观察到土壤粘土含量和NCE之间存在正相关关系。源自粪便/秸秆的全球 NCE 高分辨率绘图以及对 NCE 动态的深入了解为诊断气候变化下农田土壤碳动态以及确定碳管理的优先区域和行动提供了基准。