生态与农村环境学报2026，Vol.42Issue(5)：671-679,9.DOI:10.19741/j.issn.1673-4831.2025.0129
滨海盐碱地典型人工林土壤有机碳分布特征与关键影响因素研究
Characteristics of Soil Organic Carbon Distribution and Influencing Factors in Typical Artificial Forests with Coastal Saline-alkalinene Soils
摘要
Abstract
This study was conducted to investigate the characteristics of soil organic carbon distribution and its key influ-encing factors in artificial forests with coastal saline-alkaline soil,thereby providing a scientific basis for improving the car-bon sink capacity of these ecosystems.Five typical 15-year-old coastal saline-alkaline artificial forests comprising poplar(Populus tomentosa),white wax(Fraxinus chinensis),elm(Ulmus pumila),zelkova(Zelkova serrata),or soap pod(Gleditsia sinensis)trees established concurrently in Jiangsu were selected as study sites.Comprehensive analyses were conducted by measuring physical and chemical properties,enzyme activities,and carbon contents in three soil layers(0-20,＞20-40,and＞40-60 cm).Various methods,including structural equation modeling,were used,which revealed the following:(1)Improvements in soil physical properties did not differ substantially among forest types;with increasing soil depth,coastal saline-alkaline forest soil bulk density,pH,electrical conductivity,and alkalization increased,whereas aeration and porosity decreased.(2)Compared with other forest soils,zelkova and soap pod forest soils had a lower pH,electrical conductivity,and alkalinity;the superior amelioration of their saline-alkaline soils was in contrast to the limited improvements in the soils of poplar and fast-growing white wax forests.(3)Soil sucrase activities were highest in the pop-lar forest,whereas soil β-glucosidase and urease activities were highest in the elm forest and lowest in the soap pod forest.(4)The organic carbon content of the surface soil layer(0-20 cm)did not differ significantly among forest stands(P＞0.05);however,organic carbon contents of soil layers below 20 cm differed significantly among forest stands(P＜0.05),with the elm forest soil sequestering the most carbon.(5)Soil acidity and urease activity were the main determi-nants of the carbon storage capacity of coastal saline-alkaline soil.Therefore,soil carbon sequestration in artificial forests with coastal saline-alkaline soil may be enhanced by improving soil structural characteristics and promoting the activity of soil enzymes,including urease,to increase the organic carbon content of deep soil layers.关键词
滨海盐碱地/人工林/土壤固碳/酶活性Key words
coastal saline-alkaline land/artificial forest/soil carbon sequestration/enzyme activity分类
农业科技引用本文复制引用
郑辉杰,彭翔,李涛,张金池,曾婧祎,张水锋,刘鑫..滨海盐碱地典型人工林土壤有机碳分布特征与关键影响因素研究[J].生态与农村环境学报,2026,42(5):671-679,9.基金项目
江苏省科技项目(BE2022420) （BE2022420）
江苏省高等学校大学生创新创业训练计划项目(202310298066Y) （202310298066Y）
江苏高校"青蓝工程" （）
