| 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. |
| 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 |
| 投稿时间：2024-08-22 |
| DOI：10.11654/jaes.2024-0712 |
| 中文关键词: Si-P改性生物炭 Cd钝化 土壤肥力调控 小白菜生长 |
| 英文关键词: Si-P modified biochar Cd passivation soil fertility regulation pakchoi growth |
| 基金项目:河南省科技攻关项目（212102110110）；河南省教育厅高等学校重点科研项目（24A610001）；河南省科技厅创新研发专项（241111320600） |
| 作者 | 单位 | E-mail | | 周晗 | 河南大学地理科学与工程学部, 地理科学学院, 郑州 450046
河南省土壤重金属污染控制与修复工程研究中心, 河南 开封 475004 | | | 丁永丰 | 河南大学地理科学与工程学部, 地理科学学院, 郑州 450046
河南省土壤重金属污染控制与修复工程研究中心, 河南 开封 475004 | | | 丁壬淇 | 河南大学地理科学与工程学部, 地理科学学院, 郑州 450046
河南省土壤重金属污染控制与修复工程研究中心, 河南 开封 475004 | | | 尚子捷 | 河南大学地理科学与工程学部, 地理科学学院, 郑州 450046
河南省土壤重金属污染控制与修复工程研究中心, 河南 开封 475004 | | | 许帅 | 河南大学地理科学与工程学部, 地理科学学院, 郑州 450046
河南省土壤重金属污染控制与修复工程研究中心, 河南 开封 475004 | | | 陈志凡 | 河南大学地理科学与工程学部, 地理科学学院, 郑州 450046
河南省土壤重金属污染控制与修复工程研究中心, 河南 开封 475004 | chenzhf0604@163.com |
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| 中文摘要: |
| 为探究 Si-P改性生物炭对弱碱性 Cd污染土壤的肥力调控效应和对小白菜生长的影响，以玉米秸秆、硅藻土和重过磷酸钙为原材料，以5∶1∶1质量比在600 ℃氮气氛围下制得Si-P改性生物炭（B5PSi600），通过小白菜盆栽实验研究了Si-P改性生物炭和单一生物炭在不同添加量（0.1%、1%、3%）下对弱碱性 Cd污染土壤中 N、P、K等养分的调控效应，以及对小白菜生长和 Cd迁移富集等的影响。结果表明：Si-P改性生物炭在3%添加量下显著提高了土壤中N、P、K含量；显著降低了土壤中Cd有效态含量，促进了土壤中Cd的弱酸溶解态和可还原态向残渣态和可氧化态转化；Si-P改性生物炭显著降低了Cd的生物迁移，减少了小白菜中Cd的积累，特别是在3%施加量时Cd的富集系数和转移系数分别降低了38.74%和34.89%。同时，施加Si-P改性生物炭不仅显著提高了小白菜的根长和生长高度，有效提高了小白菜中营养元素（N、P、K）含量，而且减弱了Cd对小白菜的氧化胁迫，提高了叶绿素含量，降低了小白菜的超氧化物歧化酶、过氧化氢酶和过氧化物酶活性以及丙二醛含量。研究表明，Si-P改性生物炭在调控弱碱性Cd污染土壤肥力与小白菜生长方面表现出了良好的效果，其中3%添加量最为适宜。 |
| 英文摘要: |
| 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%. |
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