土壤碳
碳纤维
垃圾箱
环境科学
透视图(图形)
总有机碳
环境化学
土壤科学
化学
生态学
土壤水分
计算机科学
生物
算法
人工智能
复合数
作者
Jia Zeng,Jing Wang,Hao Wu,Haoxuan Xie,Xiangnan Li,Weichao Liu,Hanyu Liu,Yaoyao Du,Miaoping Xu,Chengjie Ren,Gaihe Yang,Xinhui Han
标识
DOI:10.1016/j.scitotenv.2024.175092
摘要
Plant litter is an important source of soil organic carbon (SOC) in terrestrial ecosystems, and the pattern of litter inputs is also influenced by global change and human activities. However, the current understanding of the impact of changes in litter inputs on SOC dynamics remains contentious, and the mechanisms by which changes in litter inputs affect SOC have rarely been investigated from the perspective of microbial carbon use efficiency (CUE). We conducted a 1-year experiment with litter treatments (no aboveground litter (NL), natural aboveground litter (CK), and double aboveground litter (DL)) in Robinia pseudoacacia plantation forest on the Loess Plateau. The objective was to assess how changes in litter input affect SOC accumulation in forest soils from the perspective of microbial CUE. Results showed that NL increased soil microbial C limitation by 77.11 % (0-10 cm) compared to CK, while it had a negligible effect on nitrogen and phosphorus limitation. In contrast, DL had no significant effect on soil microbial nutrient limitation. Furthermore, NL was found to significantly increase microbial CUE and decrease microbial metabolic quotient (QCO
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