3种真红树群落土壤理化性状对有机碳分布的影响  

Effects of soil physical and chemical properties on organic carbon distribution in three true mangrove communities

作　　者：冯怡琳 贺炬成 许培容 唐婧 张晖 FENG Yilin;HE Jucheng;XU Peirong;TANG Jing;ZHANG Hui(College of Horticulture and Landscape Architecture,Zhongkai University of Agriculture and Engineering,Guangzhou,Guangdong 510225,China;Guangdong Lingnanyuan Exploration and Design Co.,Ltd.,Guangzhou,Guangdong 510500,China)

机构地区：[1]仲恺农业工程学院园艺园林学院,广东广州510225 [2]广东省岭南院勘察设计有限公司,广东广州510500

出　　处：《亚热带农业研究》2024年第4期266-273,共8页Subtropical Agriculture Research

基　　金：广东省土地复垦植被恢复工程技术研究中心资助。

摘　　要：[目的]探讨真红树群落土壤有机碳的分布及影响碳储量的主要因素,以期为提高红树林湿地固碳增汇能力和经济效益提供参考。[方法]对广东台山烽火角人工林中的无瓣海桑、秋茄和拉关木3种真红树开展植物群落调查与林下土壤取样,比较了0~15 cm、15~30 cm、30~50 cm、50~70 cm、70~100 cm土层的土壤有机碳含量和碳密度的差异,并分析了土壤有机碳含量、碳密度与全氮(TN)、全磷(TP)、全钾(TK)含量以及pH、电导率等环境因子的相关性。[结果](1)3种真红树群落土壤碳密度从大到小依次为:无瓣海桑(10.94 kg·m^(-3))>拉关木(9.45 kg·m^(-3))>秋茄(6.32 kg·m^(-3))。(2)真红树群落土壤有机碳含量和碳密度与电导率和TN呈负相关,与pH和TP呈正相关;土壤有机碳含量与土壤TK呈负相关,碳密度与TK呈正相关。其中,pH是影响真红树群落土壤有机碳含量和碳密度的主要环境因子。(3)环境因子特征分析表明,无瓣海桑和拉关木群落0~100 cm土层平均pH值显著高于秋茄群落。拉关木0~100 cm土层的平均TN和TK含量分别显著高于无瓣海桑的TN和秋茄的TK含量,3个树种的土壤平均TP含量差异不显著。[结论]3种真红树林下沉积物存在差异,直接影响了群落碳密度。无瓣海桑群落表层土壤有机碳含量显著高于深层土壤,3种真红树群落均以0~15 cm土层的土壤碳密度最高。[Purpose]The aim of the study is to explore the distribution of soil organic carbon under true mangrove forests and the main factors affecting carbon storage,with a view to providing reference for improving the carbon sequestration and sink capacity of mangrove wetlands and their economic benefits.[Method]Plant community surveys and understorey soil sampling were carried out on three species of true mangrove(Sonneratia apetala,Kandelia candel,Laguncularia racemosa)in the Fenghuojiao plantation forests in Taishan,Guangdong Province.The soil organic carbon concentration and carbon density in the soil layers of 0-15 cm,15-30 cm,30-50 cm,50-70 cm,and 70-100 cm were compared,and the correlation between soil organic carbon concentration,carbon density,and environmental factors were also analyzed,such as total nitrogen(TN),total phosphorus(TP),and total potassium(TK),pH value and soil conductivity.[Result](1)Soil carbon density of three true mangrove communities,in descending order,was 10.94 kg·m^(-3) for S.apetala,9.45 kg·m^(-3) for L.racemosa,and 6.32 kg·m^(-3) for K.candel.(2)Soil organic carbon concentration and carbon density of three true mangrove communities were negatively correlated with soil conductivity and TN,and positively correlated with pH and TP.Soil organic carbon was negatively correlated with TK,and carbon density was positively correlated with TK.Among them,pH was the main environmental factor affecting the organic carbon and carbon density of true mangrove soils.(3)Characterization of the environmental factors showed that the average soil pH values of S.apetala and L.racemosa were significantly higher than that of K.candel.TN of L.racemosa was significantly higher than that of S.apetala and TK of L.racemose was significantly higher than that of K.candel.The differences in soil TP concentrations among the three tree species were not significant.[Conclusion]There were differences in the sediments under the three true mangrove forests,which directly affected the soil carbon density.The organic carbo

关 键 词：真红树 土壤有机碳 环境因子 理化性状 

分 类 号：S153.6[农业科学—土壤学]