山西农业大学学报（自然科学版）2025，Vol.45Issue(5)：9-17,9.DOI:10.13842/j.cnki.issn1671-8151.202505037
黄河三角洲滨海盐碱地改良效果评价
Evaluation of the improvement effects on coastal saline-alkali lands in the Yellow River Delta
摘要
Abstract
[Objective]The coastal saline-alkali land in the Yellow River Delta suffer from low productivity due to poor soil struc-ture and high salinity,which challenges China's strategic goals for farmland preservation and food security.This study aimed to identify effective soil amendments,assess their individual and combined effects on soil improvement,and explore integrated technical measures suitable for rehabilitating these coastal saline-alkali lands,thereby providing technical support for the"Stor-ing Grain in Land"strategy.[Methods]A field experiment was conducted from 2022 to 2024 in Qingfu Community,Liutuan Town,Changyi City,Shandong Province,an area cjaracterized by mild to moderate salinity within the Yellow River Delta.Employing a wheat-maize rotation system,the experiment used optimized fertilization(OPT)as a baseline and tested it in com-bination with four soil amendments:nitro-humic acid,micro-mineral powder,phosphogypsum,and polyacrylamide.A total of eight treatments were established,with conventional fertilization(FP)serving as the control.After two consecutive years of amendment application,differences in topsoil quality and crop yield were analyzed using the soil quality index(SQI)and princi-pal component analysis(PCA)to identify the optimal treatment combination.[Results]Compared to the FP treatment,the OPG treatment(optimized fertilization+phosphogypsum)significantly reduced topsoil pH,total soluble salt content,Mg2+content,Na+content,and Sodium Adsorption Ratio(SAR)by 6.65%,39.35%,44.70%,96.30%,and 96.22%,respec-tively.Although the OSR2 treatment(optimized fertilization+split application of micro-mineral powder)only significantly re-duced the total soluble salt content,it achieved the highest soil quality index(SQI)of 0.67 and the top comprehensive score in the principal component analysis.Furthermore,OSR2 resulted in a significantly increase by 10.78%in the average annual yield.[Conclusion]The application of mineral powder as a base fertilizer during the wheat and corn seasons,combined with op-timized fertilization,proved to be the most effective comprehensive improvement measure in this study.However,the relative-ly high Na+content and SAR value in the topsoil under this treatment indicated a persistent risk of salinization-alkalization.Fu-ture research should explore its combination with phosphogypsum to further enhance the amelioration effect.关键词
滨海盐碱地/土壤改良/土壤质量指数/主成分分析/作物产量Key words
Coastal saline-alkali lands/Soil improvement/Soil quality index(SQI)/Principal component analysis(PCA)/Crop yield分类
农业科学引用本文复制引用
杨岩,刘兆辉,刘玉敏,赵环宇,石璟,江丽华,郭立亮,徐钰..黄河三角洲滨海盐碱地改良效果评价[J].山西农业大学学报（自然科学版）,2025,45(5):9-17,9.基金项目
国家重点研发计划项目(2021YFD1900903,2023YFD1902703) （2021YFD1900903,2023YFD1902703）
山东省重点研发计划(科技示范工程)(2022SFG0302) （科技示范工程）
山东省科技型中小企业创新能力提升项目(2023TSGC0130) （2023TSGC0130）
