江苏沿海典型滩涂围垦区土壤有机碳时空异质性  

Spatiotemporal Heterogeneity of Soil Organic Carbon in Reclamation Areas of Tidal Flat in North Jiangsu Province

作　　者：李雪盈 濮励杰[1,2] 许艳[1,2,3] 徐辰星 朱明 徐彩瑶[1,2] 解雪峰[1,2] LI Xueying;PU Lijie;XU Yan;XU Chenxing;ZHU Ming;XU Caiyao;XIE Xuefeng(School of Geographic and Oceanographic Sciences,Nanjing University,Nanjing 210023,China;The Key Laboratory of the Coastal Zone Exploitation and Protection,Ministry of Land and Resources,Nanjing 210023,China;School of Environmental Science and Engineering,Suzhou University of Science and Technology,Suzhou,Jiangsu 215009,China)

机构地区：[1]南京大学地理与海洋科学学院,南京210023 [2]国土资源部海岸带开发与保护重点实验室,南京210023 [3]苏州科技大学环境科学与工程学院,江苏苏州215009

出　　处：《土壤》2020年第2期365-371,共7页Soils

基　　金：国家自然科学基金重点项目(41230751)资助。

摘　　要：应用地统计学方法研究了如东县4个滩涂围垦区以及光滩不同土层(0~10、10~20、20~30、30~40、40~60 cm)剖面土壤有机碳含量时空变异特征。结果表明:土壤有机碳含量随着围垦时间的增加呈上升趋势;Kriging插值结果显示各层土壤有机碳含量均呈现自沿海向内陆增加的趋势,并且不同土层呈现出不同的局部效应,随着剖面深度的增加有机碳含量下降;不同深度土壤有机碳含量的主控因素不同,表层土壤有机碳比深层土壤有机碳更多地受地表活动控制;从不同的土地利用方式来看,土壤有机碳含量呈现出耕地大于养殖水体;研究区土壤有机碳含量同土壤细颗粒特别是粒径在0.002~0.02 mm范围内的粉粒含量呈显著正相关关系,同土壤pH及总盐呈负相关关系。研究结果表明围垦加剧了土壤有机碳的时空异质性,对于后续指导滩涂合理有序的开发利用具有重要意义。A study was carried out using Geostatistics method to explore the spatiotemporal variability of soil organic carbon(SOC)contents in different layers(0–10,10–20,20–30,30–40,40–60 cm)in 4 reclamation areas and tidal flat in Rudong County of Jiangsu Province.The results show that the average content of SOC increased with the increase of the reclamation year.SOC content displayed an increasing trend from beach to inland with local effects according to different soil layers and a decreasing trend with soil depth in a soil profile.The main controlling factors of SOC contents were different among different soil layers,and the topsoil was more driven by people activities.From the perspective of land use,SOC content of cultivated land was higher than that of aquaculture body.SOC content was significantly positively correlated with soil fine particles especially silts,and negatively correlated with pH and total salt.The above results indicate that the reclamation intensified the spatiotemporal heterogeneity of SOC,which is of great significance for the guidance of rational and orderly development and utilization of tidal flat.

关 键 词：围垦 有机碳 时空变异 如东 

分 类 号：S158.9[农业科学—土壤学]