中国生态农业学报2025，Vol.33Issue(6)：1083-1093,11.DOI:10.12357/cjea.20240546
吕梁山撂荒枣林不同生态转型模式对土壤团聚体稳定性及胶结物质的影响
Effects of different ecological transition patterns on soil aggregate stability and cementing substances in abandoned jujube forest in the Lüliang Mountain
摘要
Abstract
The ecological transformation of abandoned jujube forests in the Lüliang Mountains is important for the ecological restora-tion of the Loess Plateau.Soil aggregates are the basic unit of soil structure,and their composition and stability are important indica-tors for evaluating soil quality.Soil cementing substance is an important material basis for the formation of aggregates.This study revealed the formation mechanism of soil aggregates by investigating the changes in the content of soil aggregates and cementing sub-stance in different ecological transition modes of Ziziphus jujuba economic forests in the Lüliang Mountain.Taking abandonment of jujube forest as control(CK),four different ecological transition modes were selected as the research objects,including replanting Medicago sativa in Ziziphus jujuba orchard(AL),replanting medicinal herbs in Z.jujuba orchard(MM),replanting Pinus tabuli-formis in Z.jujuba orchard(CP)and replanting Platycladus orientalis in Z.jujuba orchard(PO).The content and stability character-istics of water-stable aggregates with particle size＜0.053,0.053-0.250,0.250-2.000,and＞2.000 mm were analyzed.The contents of six aggregate organic cementing substances,namely soil organic carbon,fulvic acid,humic acid,polysaccharide,total glomalin related soil protein,and easily extractable glomalin related soil protein,and an inorganic cementing material(calcium car-bonate),were determined.The relationships between the content and stability of the aggregates and cementing substances were ex-plored through redundancy analysis.The results showed that:1)Compared with CK treatment,four ecological transition modes in-creased the content of aggregates with particle size＞2.000(7.78％-25.56％)and 0.250-2.000(13.04％-44.71％)mm.In addi-tion,the mean weight diameter and geometric mean diameter of aggregates also increased 0.05-0.16 and 0.02-0.08 mm,respectively,and the CP mode performed best.The aggregate destruction rate decreased 24.85％-66.15％.2)Compared with the CK treatment,the contents of the six organic cementing substances were increased under the four ecological transition modes,whereas the content of in-organic cementing substance(calcium carbonate)were reduced.3)The explanation rates of humic acid and easily extractable glomal-in related soil protein for the content and stability of aggregates were 59.0％ and 14.8％,respectively,reaching a significant level(P＜0.05),and the contribution rate of humic acid was the highest(71.0％).In summary,different modes of ecological transformation improved the stability of soil aggregates and the content of organic cementing materials.Among these,the CP mode had the best effect,and humic acid was the most significant cementing substance affecting the content and stability of soil aggregates.The results of this study are important for guiding the ecological transformation of abandoned Z.jujuba forests and promoting ecological restora-tion in the Loess Plateau.关键词
红枣经济林/生态转型模式/土壤团聚体/团聚体稳定性/胶结物质/胡敏酸Key words
economic forest of jujube/ecological transition pattern/soil aggregate/aggregate stability/cementing substances/humic acid分类
园艺学与植物营养学引用本文复制引用
李嘉琦,沐春恒,黄富超,殷海善,王改玲..吕梁山撂荒枣林不同生态转型模式对土壤团聚体稳定性及胶结物质的影响[J].中国生态农业学报,2025,33(6):1083-1093,11.基金项目
山西省自然科学基金项目(202203021211264)资助 This study was supported by the Natural Science Fundation of Shanxi Province(202203021211264). （202203021211264）
