Factors controlling <i>Carex brevicuspis</i> leaf litter decomposition and its contribution to surface soil organic carbon pool at different water levels
نویسندگان
چکیده
Abstract. Litter decomposition plays a vital role in wetland carbon cycling. However, the contribution of aboveground litter to soil organic (SOC) pool has not yet been quantified. Here, we conducted Carex brevicuspis leaf input experiment clarify intrinsic factors controlling and quantify its SOC at different water levels. The genus is ubiquitous global freshwater wetlands. We sampled this plant −25, 0, +25 cm relative surface over 280 d analysed pool. percentage dry weight loss instantaneous rate were highest level (61.8 %, 0.01307 d−1), followed by 0 (49.8 0.00908 lowest −25 (32.4 0.00527 d−1). Significant amounts carbon, nitrogen, phosphorus released all three significantly increased microbial biomass fungal density but had nonsignificant impacts on bacteria, actinomycetes, fungal∕bacterial concentrations Compared with removal, addition 16.93 9.44 2.51 % +25, levels, respectively. Hence, higher levels facilitate release from into via leaching. In way, they increase At lower lost due slower active (actinomycete) respiration. Our results revealed that natural wetlands influenced mainly leaching activity, extension, affected
منابع مشابه
Organic Carbon Accumulation in Topsoil Following Afforestation with Willow: Emphasis on Leaf Litter Decomposition and Soil Organic Matter Quality
Short-rotation intensive cultures (SRICs) of willows can potentially sequester carbon (C) in soil. However, there is limited information regarding the factors governing soil organic C (Corg) accumulation following afforestation. The objectives of this study were to: (i) determine whether willow leads to Corg accumulation in the topsoil (0–10 cm) two to six years after establishment in five SRIC...
متن کاملEffect of moisture on leaf litter decomposition and its contribution to soil respiration in a temperate forest
متن کامل
Factors Controlling Carbon Metabolism and Humification in Different Soil Agroecosystems
The aim of this study was to describe the processes that control humic carbon sequestration in soil. Three experimental sites differing in terms of management system and climate were selected: (i) Abanilla-Spain, soil treated with municipal solid wastes in Mediterranean semiarid climate; (ii) Puch-Germany, soil under intensive tillage and conventional agriculture in continental climate; and (ii...
متن کاملSoil moisture and soil-litter mixing effects on surface litter decomposition: A controlled environment assessment
Recent studies suggest the long-standing discrepancy between measured and modeled leaf litter decomposition in drylands is, in part, the result of a unique combination of abiotic drivers that include high soil surface temperature and radiant energy levels and soil-litter mixing. Temperature and radiant energy effects on litter decomposition have been widely documented. However, under field cond...
متن کاملEmission of Carbon Dioxide Influenced by Different Water Levels from Soil Incubated Organic Residues
We studied the influence of different organic residues and water levels on decomposition rate and carbon sequestration in soil. Organic residues (rice straw, rice root, cow dung, and poultry litter) including control were tested under moistened and flooding systems. An experiment was laid out as a complete randomized design at 25°C for 120 days. Higher CO₂-C (265.45 mg) emission was observed in...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Biogeosciences
سال: 2021
ISSN: ['1726-4189', '1726-4170']
DOI: https://doi.org/10.5194/bg-18-1-2021