黄河三角洲不同经济林土壤有机碳分布特征及改良土壤效应  

Distribution characteristics of soil organic carbon and soil improvement effects of different economic forests in the Yellow River Delta

作　　者：芦月 杨静 李仕辉 刘文静 徐海东 高芳磊 赵西梅[1] 夏江宝[1] LU Yue;YANG Jing;LI Shihui;LIU Wenjing;XU Haidong;GAO Fanglei;ZHAO Ximei;XIA Jiangbao(Shandong Key Laboratory of Eco-Environmental Science for Yellow River Delta,Shandong University of Aeronautics,256603,Binzhou,Shandong,China;Dongying Wetland Urban Construction Promotion Center,257000,Dongying,Shandong,China)

机构地区：[1]山东航空学院,山东省黄河三角洲生态环境重点实验室,山东滨州256603 [2]东营市湿地城市建设推进中心,山东东营257000

出　　处：《中国水土保持科学》2025年第2期180-189,共10页Science of Soil and Water Conservation

基　　金：中央引导地方科技发展资金项目“黄河三角洲盐碱地防护林营建技术推广应用及示范”(YDZX2022101);泰山学者工程专项“植物对水盐环境的响应过程与适应机制研究”(TSQN201909152)。

摘　　要：为探究黄河三角洲不同经济林土壤有机碳分布特征、碳汇潜能以及改良土壤能力,明确经济林对土壤有机碳、土壤结构和肥力的影响规律。选取黄河三角洲典型经济林树种沾化冬枣(ZJ)、油桃(PN)、鸭梨(PB)、油桃+鸭梨混交林(PNPB)作为研究对象,以当地典型防护林树种白杨(PA)作为对照,测定0~20 cm和20~40 cm土层的土壤有机碳、水分物理和速效养分指标。结果显示:1)0~40 cm土壤有机碳质量分数和密度分别为3.85~10.76 g/kg和0.97~3.00 kg/m^(2),与PA相比,经济林分别增加49.76%和51.12%;土壤蓄水性能为PNPB>PA>单一林分经济林;土壤速效养分质量分数为PB最高,PA最低。2)土壤有机碳、蓄水性能和速效养分质量分数为0~20 cm>20~40 cm。3)土壤有机碳质量分数和密度与土壤含水量、土壤蓄水性能、pH、速效磷、速效钾质量分数呈极显著相关关系(P<0.01)。研究发现,土壤碳汇潜能和速效养分质量分数均为PB最好,其次是PN和ZJ;土壤蓄水性能PNPB最好,其次是单一林分;PB和PNPB是提升土壤碳汇潜能和改良土壤效果较好的栽植模式。研究结果可为黄河三角洲经济林改良土壤效应提供参考。[Background]This study explored the soil organic carbon(SOC)distribution characteristics and soil carbon(C)sink potential of different types of economic forests in the Yellow River Delta,as well as improving soil capacity,thereby clarifying the influence of economic forests on SOC,soil structure and fertility,and the effects of different economic forests and their planting patterns on soil improvement were discussed.[Methods]Typical economic forest tree species(i.e.Ziziphus jujuba,Prunus persica var.nectarina,Pyrus bretschneideri and P.persica var.nectarina+P.bretschneideri)in the Yellow River Delta were selected as the research objects,and Populus alba farmland shelterbelt was selected as the control.Soil samples from the 0-20 cm and 20-40 cm soil layers of different treatments were collected to measure SOC,moisture physical and available nutrient indicators.The soil improvement effects of different economic forests were comprehensively evaluated by correlation analysis and fuzzy mathematics membership function method.[Results]1)The mean values of SOC content and density in the 0-40 cm soil layer ranged from 3.85 to 10.76 g/kg and 0.97 to 3.00 kg/m^(2).Respectively,which were higher in the economic forest than in the P.alba,increasing by 49.76% and 51.12% compared with P.alba.The soil water-holding capacity was shown as follows:P.persica var.nectarina+P.bretschneideri>P.alba>single stand economic forest;the content of soil available nutrient in P.bretschneideri soil was the highest,and P.alba was the lowest.2)The SOC content and density and soil water-holding capacity and available nutrient contents in the 0-20 cm soil layer were exceeded that of 20-40 cm.3)SOC content and density were significantly correlated with soil water content,soil water storage capacity,pH,available phosphorus and available potassium content.[Conclusions]This study has revealed that soil C sink potential and available nutrient content in P.bretschneideri is the best,followed by P.persica var.nectarina and Z.jujuba;P.persica var.nectarina

关 键 词：土壤有机碳 土壤养分 土壤改良 经济林 黄河三角洲 

分 类 号：S714.6[农业科学—林学]