黄土高原土壤有机碳组分对保守植被演替的响应

IF 7.3 1区 农林科学 Q1 ENVIRONMENTAL SCIENCES International Soil and Water Conservation Research Pub Date : 2023-09-01 DOI:10.1016/j.iswcr.2022.05.002
Muhammad Imran Ghani , Jing Wang , Peng Li , Shamina Imran Pathan , Tanveer Ali Sial , Rahul Datta , Ali Mokhtar , Esmat F. Ali , Jörg Rinklebe , Sabry M. Shaheen , Mengyun Liu , Hamada Abdelrahman
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引用次数: 5

摘要

土地利用变化深刻影响着土壤有机碳(SOC)固存和温室气体排放的平衡。在当前全球气候变化的背景下,了解生态恢复和保护管理对不同土地利用下土壤有机碳动态的影响至关重要,尤其是在侵蚀濒危的黄土土壤中。因此,我们通过一系列不稳定组分,即:轻组分有机碳(LFOC)、重组分有机C(HFOC)、粗颗粒有机碳(CPOC)、细颗粒有机碳和溶解有机碳(DOC),与农田(FL)相比,研究了不同年龄的两种森林,即刺槐(RP)和侧柏(PO)SOC的变化。RP林的SOC和STN含量在42年内显著增加,其中CPOC和FPOC的含量显著高于FL。此外,在所研究的土地利用类型中,总SOC及其不稳定组分与土壤CaCO3、pH和STN的含量显著相关,表明它们在SOC固存中起着关键作用。本文报道的不同年龄的不同植被的结果提供了对植被恢复不同阶段SOC和STN变化的更好理解。研究结果表明,长期的自然植被恢复是黄土土壤有机碳固存和土壤保持的有效途径。
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Variations of soil organic carbon fractions in response to conservative vegetation successions on the Loess Plateau of China

Land use changes profoundly affect the equilibrium of soil organic carbon (SOC) sequestration and greenhouse gas emissions. With the current global climatic changes, it is vital to understand the influence of ecological restoration and conservation management on the dynamics of SOC under different land uses, especially in erosion-endangered Loess soils. Therefore, we investigated changes in SOC through a suit of labile fractions, namely: light fraction organic C (LFOC), heavy fraction organic C (HFOC), coarse particulate organic C (CPOC), fine particulate organic C (FPOC), and dissolved organic C (DOC), from two forests i.e., Robinia pseudoacacia (RP) and Platycladus orientalis (PO), with different ages, in comparison with farmland (FL). The SOC and STN contents significantly increased over 42 years in the RP forest where the contents of CPOC and FPOC were significantly higher than in the FL. Moreover, total SOC and its labile fractions, in the studied land use types, significantly correlated with soil CaCO3, pH, and STN contents, indicating their key roles in SOC sequestration. The results reported here from different vegetation with different ages provide a better understanding of SOC and STN alterations at different stages of vegetation restoration. Our findings suggest that long-term natural vegetation restoration could be an effective approach for SOC sequestration and soil conservation on the Loess soil.

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来源期刊
International Soil and Water Conservation Research
International Soil and Water Conservation Research Agricultural and Biological Sciences-Agronomy and Crop Science
CiteScore
12.00
自引率
3.10%
发文量
171
审稿时长
49 days
期刊介绍: The International Soil and Water Conservation Research (ISWCR), the official journal of World Association of Soil and Water Conservation (WASWAC) http://www.waswac.org, is a multidisciplinary journal of soil and water conservation research, practice, policy, and perspectives. It aims to disseminate new knowledge and promote the practice of soil and water conservation. The scope of International Soil and Water Conservation Research includes research, strategies, and technologies for prediction, prevention, and protection of soil and water resources. It deals with identification, characterization, and modeling; dynamic monitoring and evaluation; assessment and management of conservation practice and creation and implementation of quality standards. Examples of appropriate topical areas include (but are not limited to): • Conservation models, tools, and technologies • Conservation agricultural • Soil health resources, indicators, assessment, and management • Land degradation • Sustainable development • Soil erosion and its control • Soil erosion processes • Water resources assessment and management • Watershed management • Soil erosion models • Literature review on topics related soil and water conservation research
期刊最新文献
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