土壤2025，Vol.57Issue(2)：318-324,7.DOI:10.13758/j.cnki.tr.2025.02.009
外源有机物料添加对盐渍化农田土壤性质和微生物群落的影响
Effects of Exogenous Organic Materials on Soil Properties and Microbial Community in Salinized Farmland
摘要
Abstract
In order to explore the effects of exogenous organic materials on the improvement of salinized farmland in Shiyang River irrigation area,in this study,woody peat and decomposed straw were used as experimental materials,the changes of chemical properties and microbial communities of salinized farmland soil under different amounts of organic materials were analyzed through field experiment and high-throughput sequencing.The results showed that compared with the control,the addition of organic materials reduced the electrical conductivity and total amount of water-soluble salts,increased the contents of organic matter,total nitrogen,alkali-hydrolyzable nitrogen,available phosphorus,available potassium and CEC,and adjusted the concentrations of base ions.The treatments of 9 000 kg/hm2 woody peat+3 000 kg/hm2 decomposed straw and 13 500 kg/hm2 woody peat+4 500 kg/hm2 decomposed straw had better effects.And the addition of organic materials changed the structure of bacterial community,significantly increased the relative abundances of Proteobacteria and Actinobacteriota,and decreased the relative abundance of Acidobacteriota.Correlation analysis showed that Proteobacteria relative abundance was significantly positively correlated with total nitrogen content,Actinobacteriota relative abundance was significantly positively correlated with organic matter content and negatively correlated with water-soluble salt content,and Acidobacteriota relative abundance was significantly positively correlated with pH and negatively correlated with organic matter content and CEC.Based on the changes of soil chemical properties,salinity and microorganisms,the addition of woody peat(9 000-13 500 kg/hm2)+decomposed straw(3 000-4 500 kg/hm2)is recommended for the improvement of salinized farmland in Shiyang River irrigation area.关键词
木本泥炭/阳离子交换量/盐基离子/细菌多样性Key words
Woody peat/Cation exchange capacity/Salt-based ions/Bacterial diversity分类
农业科技引用本文复制引用
宿翠翠,周彦芳,丁照耘,邓超超,高正睿,王振龙,毋玲玲,刘强..外源有机物料添加对盐渍化农田土壤性质和微生物群落的影响[J].土壤,2025,57(2):318-324,7.基金项目
甘肃省自然科学基金项目(23JRRH0003)、甘肃省2024年省级人才项目(甘组通字[2024]4号)和甘肃省科技特派员专项(23CXNH0019)资助. （23JRRH0003）
