Residue decomposition and priming of soil organic carbon following different NPK fertilizer histories
نویسندگان
چکیده
منابع مشابه
Influence of Residue and Nitrogen Fertilizer Additions on Carbon Mineralization in Soils with Different Texture and Cropping Histories
To improve our ability to predict SOC mineralization response to residue and N additions in soils with different inherent and dynamic organic matter properties, a 330-day incubation was conducted using samples from two long-term experiments (clay loam Mollisols in Iowa [IAsoil] and silt loam Ultisols in Maryland [MDsoil]) comparing conventional grain systems (Conv) amended with inorganic fertil...
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Soil organic carbon (SOC) is a major component in the global carbon cycle. Yet how input of plant litter may influence the loss of SOC through a phenomenon called priming effect remains highly uncertain. Most published results about the priming effect came from short-term investigations for a few weeks or at the most for a few months in duration. The priming effect has not been studied at the a...
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In a 122-day incubation experiment with two soil types under four temperature treatments, we examined whether the temperature sensitivity of soil organic carbon (SOC) decomposition differed between constant and diurnally-varying soil temperature regimes. We calculated the Q10 values after accounting for changes in substrate availability and quality among treatments over time. The Q10 values und...
متن کاملAddition of External Organic Carbon and Native Soil Organic Carbon Decomposition: A Meta-Analysis
BACKGROUND Extensive studies have been conducted to evaluate the effect of external organic Carbon on native soil organic carbon (SOC) decomposition. However, the direction and extent of this effect reported by different authors is inconsistent. OBJECTIVE The objective was to provide a synthesis of existing data that comprehensively and quantitatively evaluates how the soil chemical propertie...
متن کاملLabile soil carbon inputs mediate the soil microbial community composition and plant residue decomposition rates.
Root carbon (C) inputs may regulate decomposition rates in soil, and in this study we ask: how do labile C inputs regulate decomposition of plant residues, and soil microbial communities? In a 14 d laboratory incubation, we added C compounds often found in root exudates in seven different concentrations (0, 0.7, 1.4, 3.6, 7.2, 14.4 and 21.7 mg C g(-1) soil) to soils amended with and without (13...
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ژورنال
عنوان ژورنال: Soil Science Society of America Journal
سال: 2020
ISSN: 0361-5995,1435-0661
DOI: 10.1002/saj2.20142