| 热改性高岭土对土壤Cd形态及辣椒累积Cd的影响 |
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| 引用本文： | 杨娇娇,柴冠群,刘桂华,王莹,秦松,范成五.热改性高岭土对土壤Cd形态及辣椒累积Cd的影响[J].中国农学通报,2021,37(20):71-76. |
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| 作者姓名： | 杨娇娇 柴冠群 刘桂华 王莹 秦松 范成五 |
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| 作者单位： | 1.贵州大学农学院,贵阳 550025;2.贵州省农业科学院土壤肥料研究所,贵阳 550006;3.遵义播州区农业农村局,贵州遵义 563100 |
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| 基金项目： | 黔科合支撑“遵义辣椒产地重金属调查及安全生产关键技术研究与示范”([2018]2338) |
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| 摘 要： | 为了探明热改性高岭土对土壤-辣椒体系中Cd迁移的影响,研究2个温度(300、500℃)对高岭土进行热改性,采用盆栽的方式探究高岭土及热改性高岭土对于Cd污染土壤中Cd的形态分布以及对辣椒体内重金属积累的影响。结果表明：在Cd污染土壤上,施用高岭土及热改性高岭土提高土壤pH,但处理间差异不显著;与CK相比,添加300℃热改性高岭土(TK)与500℃热改性高岭土(FK)土壤可还原态Cd含量分别降低1.82%~33.94%、11.76%~26.67%,残渣态Cd含量分别提高46.63%~64.58%、45.96%~1.14%;各处理辣椒的根、茎、叶、果实的干重均高于CK,辣椒果实干重增产31.00%~49.28%,辣椒植株Cd富集依次为根部>叶片>茎>果实。得出结论：施用高岭土及热改性高岭土可提高土壤pH,降低土壤弱酸提取态、还原态Cd含量,减轻Cd对辣椒的协迫,3种材料修复效果为TK>FK>K。
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| 关 键 词： | 热改性 Cd形态 高岭土 累积 辣椒 |
| 收稿时间： | 2021-03-19 |
Effects of Heat Modified Kaoline on Soil Cadmium Form and Cadmium Uptake by Pepper |
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| Yang Jiaojiao,Chai Guanqun,Liu Guihua,Wang Ying,Qin Song,Fan Chengwu.Effects of Heat Modified Kaoline on Soil Cadmium Form and Cadmium Uptake by Pepper[J].Chinese Agricultural Science Bulletin,2021,37(20):71-76. |
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| Authors: | Yang Jiaojiao Chai Guanqun Liu Guihua Wang Ying Qin Song Fan Chengwu |
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| Institution: | 1.College of Agriculture, Guizhou University, Guiyang 550025;2.Institute of Soil Fertilizer, Guizhou Academy ofAgricultural Sciences, Guiyang 550006;3.Agriculture and Rural Bureau of Bozhou District, Zunyi Guizhou 563100 |
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| Abstract: | To investigate the effect of heat modified kaoline on Cd migration in soil-pepper system, heat modified kaoline at 2 temperatures (300 and 500℃) was studied, the effects of kaoline and heat modified kaoline on the morphological distribution of Cd in Cd contaminated soil and the accumulation of heavy metals in pepper were investigated by pot culture. The results showed that in Cd contaminated soil, the application of kaoline and heat modified kaoline improved soil pH, but the difference between the treatments was not significant; compared with that of CK, the reducible Cd content in 300℃ and 500℃ treatment was reduced by 1.82%-33.94% and 11.76%-26.67%, respectively, the residue Cd content was increased by 46.63%~64.58% and 45.96%-1.14%, respectively; dry weight of the roots, stems, leaves and fruits of pepper in each treatment were higher than those of CK, capsicum fruit dry weight was increased by 31.00%-49.28%, the enrichment of Cd in pepper plants was roots > leaves > stems > fruits. In conclusion, the application of kaoline and heat modified kaoline could improve soil pH, decrease the content of soil weak acid extraction state and reducible Cd, ease Cd pressure on chili pepper, and the remediation effect is TK>FK>K. |
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| Keywords: | thermal modification Cd form kaoline accumulation pepper |
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