水土保持学报2023，Vol.37Issue(6)：201-208,8.DOI:10.13870/j.cnki.stbcxb.2023.06.026
福鼎茶园土壤团聚体有机碳分布与分子结构特征
Organic Carbon Distribution and Molecular Structure Characteristics of Soil Aggregates in Fuding Tea Garden
摘要
Abstract
The soil of tea garden in Bailin Town(BL),Diantou Town(DT),Panxi Town(PX),Guanyang Town(GY)and Taimushan Town(TMS)in Fuding City,Fujian Province were taken as the research object.The composition and stability of aggregates,organic carbon content,carbon sequestration contribution rate and infrared spectrum of organic carbon of each particle size aggregates were studied to reveal the distribution and molecular structure characteristics of soil organic carbon in tea garden soil from the aggregate scale.The results showed that:(1)The composition of soil aggregates differed among sampling sites,but with the deepening of soil layer,the content of macroaggregates(0.25～2 mm)and microaggregates(0.053～0.25 mm)decreased,while the content of silt-clay aggregates(<0.053 mm)increased in all sampling sites.(2)Decreased in mean weight diameter(MWD)and geometric mean diameter(GMD)and increased in fractal dimension(D)of all sampled sites with deepening of the soil layer and decreased in structural stability of the agglomerates.(3)The organic carbon content of the aggregates decreased with the deepening of the soil layer,and the contribution rate of carbon sequestration of aggregates was mainly controlled by the percentage of aggregates,and the contribution rate of carbon sequestration of macroaggregates was relatively larger.(4)The organic carbon of each size aggregates was mainly derived from polysaccharide carbon or aliphatic carbon.The silt-clay aggregates in 0-15 cm soil layer had more stable carbon than those in macroaggregates and microaggregates.The aggregates in the 15-30 cm soil layer had more stable carbon than the corresponding size aggregates in the 0-15 cm soil layer.The research results can provide theoretical reference for the scientific management of tea garden soil organic carbon.关键词
团聚体组成/有机碳/有机碳官能团/红外光谱/茶园土壤Key words
aggregate composition/organic carbon/organic carbon functional groups/infrared spectrum/tea garden soil分类
农业科学引用本文复制引用
葛茂泉,王纯,许宏达,杨发峻,吴梓炜,林少颖,张永勋,李先德,王维奇..福鼎茶园土壤团聚体有机碳分布与分子结构特征[J].水土保持学报,2023,37(6):201-208,8.基金项目
福建福鼎白茶文化系统申报全球重要农业文化遗产项目(DH-1815) （DH-1815）
国家自然科学基金项目(41901111) （41901111）
福建省自然科学基金项目(2020J01188) （2020J01188）
