The effect of dolomite amendment on soil organic carbon mineralization is determined by the dolomite size
作者机构：College of Urban and Environmental SciencesHubei Normal UniversityHuangshiChina College of Resources and EnvironmentHuazhong Agricultural UniversityWuhanChina Department of Soil ScienceFaculty of Agricultural Sciences and TechnologyBahauddin Zakariya UniversityMultanPakistan.
出 版 物：《Ecological Processes》 (生态过程（英文）)
年 卷 期：2021年第10卷第1期
页 面：118-129页
核心收录：
学科分类：09[农学] 0903[农学-农业资源与环境] 090301[农学-土壤学]
基 金：National Key Research and Development Program of China(2017YFD0800102) Research Project of Hubei Provincial Department of Education(D20202503)
主 题：Dolomite Particle size SOC mineralization Acidic paddy soil
摘 要：Background:The size of lime material is vital for the efficiency of ameliorating soil acidity,thereby influencing soil biochemical ***,the effects of different sized lime material application on soil organic carbon(SOC)mineralization are yet to be ***,a 35-day incubation experiment was conducted to determine the effects of three particle size fractions(0.5 to 0.25,0.25 to 0.15,and0.15 mm)of dolomite on SOC mineralization of two acidic paddy ***:CO_(2) emission was increased by 3–7%,11–21%,and 32–49%for coarse-,medium-,and fine-sized dolomite treatments,respectively,compared to the control in both *** also well conformed to a first-order model in all treatments,and the estimated decomposition rate constant was significantly higher in the fine-sized treatment than that of other treatments(P0.05),indicating that SOC turnover rate was dependent on the dolomite *** finer particle sizes were characterized with higher efficiencies of modifying soil pH,consequently resulting in higher dissolved organic carbon contents and microbial biomass carbon,eventually leading to higher CO_(2) ***:The results demonstrate that the size of dolomite is a key factor in regulating SOC mineralization in acidic paddy soils when dolomite is applied to manipulate soil pH.
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