热改性高岭土对土壤Cd形态及辣椒累积Cd的影响

doi:10.11924/j.issn.1000-6850.casb2021-0288

中国农学通报 ›› 2021, Vol. 37 ›› Issue (20): 71-76.doi: 10.11924/j.issn.1000-6850.casb2021-0288

所属专题：资源与环境

• 资源·环境·生态·土壤·气象 • 上一篇下一篇

热改性高岭土对土壤Cd形态及辣椒累积Cd的影响

杨娇娇¹(), 柴冠群²(), 刘桂华², 王莹², 秦松², 范成五²

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

收稿日期:2021-03-19 修回日期:2021-05-27 出版日期:2021-07-15 发布日期:2021-08-06
通讯作者: 柴冠群
作者简介:杨娇娇,女,1995年出生,贵州毕节人,硕士研究生,研究方向：农业资源利用与环境。通信地址：550006 贵州贵阳花溪区兴农路 1865号贵州省土壤肥料研究所,E-mail：1422929102@qq.com。
基金资助:
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)

Effects of Heat Modified Kaoline on Soil Cadmium Form and Cadmium Uptake by Pepper

Yang Jiaojiao¹(), Chai Guanqun²(), Liu Guihua², Wang Ying², Qin Song², Fan Chengwu²

¹College of Agriculture, Guizhou University, Guiyang 550025
²Institute of Soil Fertilizer, Guizhou Academy ofAgricultural Sciences, Guiyang 550006
³Agriculture and Rural Bureau of Bozhou District, Zunyi Guizhou 563100

Received:2021-03-19 Revised:2021-05-27 Online:2021-07-15 Published:2021-08-06
Contact: Chai Guanqun

摘要/Abstract

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。

关键词: 热改性, Cd形态, 高岭土, 累积, 辣椒

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.

Key words: thermal modification, Cd form, kaoline, accumulation, pepper

中图分类号:

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.

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.

图/表 6

参考文献 38

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处理	高岭土及热改性高岭土	用量(w/w)/%
CK	—	0
K1	高岭土	0.2
K2	高岭土	0.5
K3	高岭土	1.0
TK1	300℃热改性高岭土	0.2
TK2	300℃热改性高岭土	0.5
TK3	300℃热改性高岭土	1.0
FK1	500℃热改性高岭土	0.2
FK2	500℃热改性高岭土	0.5
FK3	500℃热改性高岭土	1.0

处理	高岭土及热改性高岭土	用量(w/w)/%
CK	—	0
K1	高岭土	0.2
K2	高岭土	0.5
K3	高岭土	1.0
TK1	300℃热改性高岭土	0.2
TK2	300℃热改性高岭土	0.5
TK3	300℃热改性高岭土	1.0
FK1	500℃热改性高岭土	0.2
FK2	500℃热改性高岭土	0.5
FK3	500℃热改性高岭土	1.0

处理	根	茎	叶	果实
CK	4.20±0.80a	1.68±0.37a	2.19±0.26abc	0.51±0.07a
K1	4.06±0.53ab	1.12±0.21b	2.39±0.49abc	0.48±0.05ab
K2	4.04±0.39ab	0.70±0.15c	2.04±0.24abc	0.46±0.11ab
K3	3.48±0.22ab	0.93±0.04bc	1.85±0.27c	0.45±0.10ab
TK1	3.60±0.21ab	1.02±0.11bc	2.11±0.26abc	0.44±0.06ab
TK2	3.47±0.18ab	0.77±0.15bc	2.47±0.28a	0.43±0.01ab
TK3	3.97±0.02ab	0.71±0.18c	2.07±0.31abc	0.39±0.03b
FK1	3.85±0.33ab	0.88±0.09bc	1.89±0.36c	0.45±0.01ab
FK2	3.77±0.32ab	0.82±0.05bc	2.24±0.19abc	0.48±0.02ab
FK3	3.29±0.51b	1.56±0.26a	1.96±0.29bc	0.42±0.05ab

处理	根	茎	叶	果实
CK	4.20±0.80a	1.68±0.37a	2.19±0.26abc	0.51±0.07a
K1	4.06±0.53ab	1.12±0.21b	2.39±0.49abc	0.48±0.05ab
K2	4.04±0.39ab	0.70±0.15c	2.04±0.24abc	0.46±0.11ab
K3	3.48±0.22ab	0.93±0.04bc	1.85±0.27c	0.45±0.10ab
TK1	3.60±0.21ab	1.02±0.11bc	2.11±0.26abc	0.44±0.06ab
TK2	3.47±0.18ab	0.77±0.15bc	2.47±0.28a	0.43±0.01ab
TK3	3.97±0.02ab	0.71±0.18c	2.07±0.31abc	0.39±0.03b
FK1	3.85±0.33ab	0.88±0.09bc	1.89±0.36c	0.45±0.01ab
FK2	3.77±0.32ab	0.82±0.05bc	2.24±0.19abc	0.48±0.02ab
FK3	3.29±0.51b	1.56±0.26a	1.96±0.29bc	0.42±0.05ab

处理	富集系数
处理	叶/土壤	根/土壤	茎/土壤	果实/土壤l
CK	0.17	2.04	0.75	0.25
K1	0.10	1.74	0.52	0.22
K2	0.07	1.66	0.36	0.21
K3	0.02	1.39	0.46	0.21
TK1	0.05	1.86	0.47	0.19
TK2	0.08	1.61	0.38	0.23
TK3	0.09	1.53	0.35	0.19
FK1	0.05	1.83	0.43	0.22
FK2	0.03	1.79	0.40	0.24
FK3	0.12	1.32	0.68	0.18

热改性高岭土对土壤Cd形态及辣椒累积Cd的影响

Effects of Heat Modified Kaoline on Soil Cadmium Form and Cadmium Uptake by Pepper

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