农业环境科学学报2025，Vol.44Issue(4)：930-941,12.DOI:10.11654/jaes.2024-0712
Si-P改性生物炭对弱碱性Cd污染土壤肥力调控效应及小白菜生长的影响
Effects of Si-P modified biochar on the regulation of mildly alkaline Cd-Contaminated soil fertility and pakchoi growth
摘要
Abstract
In order to explore the fertility regulation effect of Si-P modified biochar on mildly alkaline Cd-contaminated soil and its effect on the growth of pakchoi,we prepared Si-P modified biochar(B5PSi600)with corn stalk,diatomaceous earth and heavy superphosphate at a mass ratio of 5∶1∶1 in a nitrogen atmosphere at 600 ℃,and studied the effects of biochar and Si-P modified biochar on N,P,K and other nutrients in mildly alkaline Cd-contaminated soil under different addition amounts(0.1％,1％,3％),as well as the effects on Cd migration and enrichment,biomass,root length and physiological characteristics in pakchoi,based on pot experiment.Results indicated that Si-P modified biochar significantly increased the contents of N,P and K in soil at 3％addition.Si-P modified biochar significantly reduced the contents of available Cd in soil,and promoted the transformation of weak acid soluble and reducible Cd in soil to residual and oxidizable Cd.The application of Si-P modified biochar inhibited the biological migration of Cd in soil-pakchoi system and reduced Cd accumulation in pakchoi.Under the application amount of 3％.The enrichment coefficient and transfer coefficient of Cd decreased by 38.74％and 34.89％,respectively.At the same time,the application of Si-P modified biochar not only significantly increased the root length and growth height of pakchoi,but also effectively increased the contents of nutrient elements(N,P,K)in pakchoi.Moreover,the oxidative stress of Cd on pakchoi was weakened,the chlorophyll content was increased,and the activities of superoxide dismutase,peroxidase and catalase and the content of malondialdehyde were decreased.The results showed that Si-P modified biochar had a good effect on regulating the soil fertility of mildly alkaline Cd contaminated soil and the growth of pakchoi,and the optimum addition amount was 3％.关键词
Si-P改性生物炭/Cd钝化/土壤肥力调控/小白菜生长Key words
Si-P modified biochar/Cd passivation/soil fertility regulation/pakchoi growth分类
园艺学与植物营养学引用本文复制引用
周晗,丁永丰,丁壬淇,尚子捷,许帅,陈志凡..Si-P改性生物炭对弱碱性Cd污染土壤肥力调控效应及小白菜生长的影响[J].农业环境科学学报,2025,44(4):930-941,12.基金项目
河南省科技攻关项目(212102110110) （212102110110）
河南省教育厅高等学校重点科研项目(24A610001) （24A610001）
河南省科技厅创新研发专项(241111320600)Science and Technology Development Program of Henan Province(212102110110) （241111320600）
Key Research Project of Higher Education Institutions by Henan Provincial Department of Education(24A610001) （24A610001）
Innovation and Research Development Special Project of Henan Provincial Department of Science and Technology(241111320600) （241111320600）
