| 黄天罡,常会庆,周芮,王启震.不同辅料添加对绿穗苋修复镉污染土壤效果影响[J].干旱地区农业研究,2025,(2):128~137 |
| 不同辅料添加对绿穗苋修复镉污染土壤效果影响 |
| Effects of different additives on the remediation of cadmium\|contaminated soil by Amaranthus hybridus L. |
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| DOI：10.7606/j.issn.1000-7601.2025.02.13 |
| 中文关键词: 镉污染土壤 绿穗苋 植物修复 辅料 |
| 英文关键词:cadmium polluted soil Amaranthus hybridus L. phytoremediation additives |
| 基金项目:国家自然科学基金（41571319） |
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| 摘要点击次数: 82 |
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| 中文摘要: |
| 以河南某地Cd污染石灰性农田为供试土壤，利用盆栽试验，通过添加猪粪、稻秆和CaCO3 3种不同辅料来探究绿穗苋对Cd污染土壤的修复效果。试验共设10个处理：基础肥料（氮、磷、钾肥料）（CK）、基础肥料分别添加0.5%（RS0.5）、1%（RS1）、3%（RS3）猪粪，0.5%（PM0.5）、1%（PM1）、3%（PM3）稻秆，1%（CC1）、3%（CC3）、5%（CC5）CaCO3，通过上述处理筛选有利于植物提取Cd的辅料配施方案。结果表明：与CK相比，施用猪粪和稻秆使土壤pH值降低，其中PM3处理下的土壤pH值在2020年和2021年分别显著降低了0.13和0.09，而施加CaCO3处理的土壤pH值均高于CK，增幅为0.89%~4.87%，且2021年除CC1处理外，其余处理均较CK差异显著。随着猪粪和稻秆施用量的增加，土壤碱解氮、速效磷、速效钾和有机碳组分HA、FA的含量以及HA/FA均有不同程度的提高，增幅为0.28%~466.53%；添加猪粪和CaCO3处理的绿穗苋Cd含量无显著变化，而施用水稻秸秆促进了绿穗苋对土壤Cd的吸收，与CK相比，PM0.5和PM3处理增加了绿穗苋总Cd积累量，增幅分别为162.77%和16.09%；两年的盆栽试验各处理土壤总Cd含量降幅为0.009~0.109 mg·kg-1，且PM0.5处理的绿穗苋提取Cd效果最明显。综上所述，施用0.5%的稻秆可用来强化绿穗苋对石灰性土壤Cd的提取。 |
| 英文摘要: |
| A pot experiment was conducted to investigate the phytoremediation effects of Amaranthus hybridus L. on Cd\|contaminated calcareous wheat fields in a specific region of Henan Province. Three different amendments—pig manure, rice straw, and calcium carbonate — were applied to assess their impact on the phytoremediation efficiency of Amaranthus hybridus L. in Cd\|contaminated soil. Ten treatments were used: basal fertilizer (N，P，K) (CK)，basal fertilizer + 0.5% pig manure (RS0.5), basal fertilizer + 1% pig manure (RS1), basal fertilizer + 3% pig manure (RS3), basal fertilizer + 0.5% straw (PM0.5), basal fertilizer + 1% straw (PM1), basal fertilizer + 3% straw (PM3), basal fertilizer + 1% CaCO3 (CC1), basal fertilizer + 3% CaCO3 (CC3), and basal fertilizer + 5% CaCO3 (CC5). Through the treatments, the auxiliary material application scheme that benefits the extraction of Cd from plants was evaluated. The results showed that the soil pH of pig manure and rice straw treatments was lower than that of the control (CK), with the pH of PM3 being significantly lower than CK by 0.13 and 0.09 in 2020 and 2021, respectively. In contrast, the soil pH of the calcium carbonate treatment was higher than CK, with an increase ranging from 0.89% to 4.87%. Additionally, except for the soil treated with CC1 in 2021, the pH of all other treatments showed significant changes. Compared to CK, the contents of available nitrogen, available phosphorus, available potassium, humic acid (HA), fulvic acid (FA), and the HA/FA ratio in the soil treated with pig manure or rice straw increased to varying degrees, with increases ranging from 0.28% to 466.53%. By the treatment of pig manure and calcium carbonate, there was no significant change in the content of Cd in Amaranthus hybridus L., while the application of rice straw in the previous crop soil promoted the absorption of Cd by Amaranthus hybridus L., compared with CK, 0.5% and 3% rice straw treatments increased the total accumulation of Cd in Amaranthus hybridus L. by 162.77% and 16.09%. In 2021, after the soil was treated with Amaranthus hybridus L., the total Cd content in the soil of each treatment was lower than in 2020, ranging from 0.009 to 0.109 mg·kg-1. The extraction effect of Amaranthus hybridus L. was most significant in the soil treated with 0.5% rice straw. Overall, the application of 0.5% rice straw enhanced the Cd extraction ability of Amaranthus hybridus L. |
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