土壤2025，Vol.57Issue(2)：325-332,8.DOI:10.13758/j.cnki.tr.2025.02.010
磷石膏添加对苏打盐碱稻田耕层土壤肥力和酶活性的影响
Effects of Phosphogypsum Addition on Soil Fertility and Enzyme Activity of the Cultivated Layer in Saline-sodic Paddy Fields
摘要
Abstract
Reclaiming the former saline-sodic wasteland as an experimental paddy field,four phosphogypsum addition treatments were set up,namely 0(CK),15(G15),30(G30),and 45 t/hm2(G45),to study the effects of phosphogypsum addition on soil fertility and enzyme activity of the cultivated layer in saline-sodic paddy fields in the western Songnen Plain.The results showed that:1)The soil organic carbon(SOC),total nitrogen(TN),total phosphorus(TP),available phosphorus(AP),carbon to nitrogen ratio(C/N)and carbon to phosphorus ratio(C/P)of phosphogypsum treatments(G15,G30 and G45)were increased by 14.59%-42.86%,14.11%-33.25%,11.62%-26.41%,15.53%-115.47%,0.66%-7.55%and 4.43%-10.78%,respectively,compared with CK treatment,with the largest increase all under G45.2)The activities of soil enzymes were significantly different among different treatments,the activities of urease,leucine aminopeptidase and alkaline phosphatase were highest under G45,the activity of sucrase was highest under G30,and the activity of cellulase was highest under CK.With the increase of phosphogypsum addition,the activities of sucrase and urease continued to increase,while the activities of cellulase,alkaline phosphatase and leucine aminopeptidase first decreased and then increased,and the minimum values all appeared under G15.The geometric mean of enzyme activities was G45>CK>G30>G15.3)Under phosphogypsum addition condition,the contents of TN,SOC,AP and TP had the greatest effects on enzyme activities(Pseudo-F≥4.6,P<0.05),phosphogypsum indirectly affected the activities of cellulase,leucine aminopeptidase and alkaline phosphatase by changing TN and SOC contents,and the activities of sucrase and urease by changing TN content.Overall,phosphogypsum addition significantly enhances the soil fertility of the cultivated layer in saline-sodic paddy fields,thereby indirectly reshaping the activity characteristics of different soil enzymes and the geometric mean of enzyme activities by altering TN and SOC contents.关键词
苏打盐碱稻田/磷石膏/土壤肥力/土壤酶Key words
Saline-sodic paddy fields/Phosphogypsum/Soil fertility/Soil enzyme分类
农业科技引用本文复制引用
周妍宏,刘宏远,王辰,刘芯彤,金明姬..磷石膏添加对苏打盐碱稻田耕层土壤肥力和酶活性的影响[J].土壤,2025,57(2):325-332,8.基金项目
吉林省与中国科学院科技合作高新技术产业化专项(2023SYHZ0052)和中国科学院黑土地保护与利用科技创新工程专项(XDA28110400)资助. （2023SYHZ0052）
