|
| 土壤与大气降尘对不同类型蔬菜铅积累的贡献差异 |
| Differences in contributions of soil and atmospheric dust-fall to lead accumulation in different types of vegetables |
| Received:April 15, 2025 |
| DOI：10.13254/j.jare.2025.0338 |
| 中文关键词: 重金属，土壤，大气降尘，贡献，蔬菜类型 |
| 英文关键词: heavy metal, soil, atmospheric dust-fall, contribution, vegetable type |
| 基金项目:四川省重点研发项目（2024YFNH0001） |
| Author Name | Affiliation | E-mail | | He Xuying | College of Resources, Sichuan Agricultural University, Chengdu 611130, China | | | Bao Yongpeng | College of Resources, Sichuan Agricultural University, Chengdu 611130, China | | | Jiang Rui | College of Resources, Sichuan Agricultural University, Chengdu 611130, China | | | Zhou Fangfang | College of Resources, Sichuan Agricultural University, Chengdu 611130, China | | | Jia Yongxia | College of Resources, Sichuan Agricultural University, Chengdu 611130, China | yongxiajia@163.com |
|
| Hits: 216 |
| Download times: 14 |
| 中文摘要: |
| 为了探讨土壤和大气降尘对不同类型蔬菜铅（Pb）积累的贡献，本研究选择非污染（pH为6.0，Pb含量为28.9 mg·kg-1）和污染（pH为6.5，Pb含量为131.8 mg·kg-1）土壤，结合交通区与农业区2种大气环境，研究土壤和大气降尘对萝卜（Raphanus sativus L.，根菜类）、油菜（Brassica napus L.，叶菜类）和黄瓜（Cucumis sativus L.，果菜类）三类蔬菜可食部位Pb积累的影响。结果表明：污染土壤中Pb含量和生物有效性分别为非污染土壤的4.55倍和5.07倍，交通区大气Pb沉降量和生物有效性分别是农业区的3.19倍和3.09倍。土壤Pb污染和大气降尘对三种蔬菜可食用部位Pb含量的影响存在差异。在污染土壤处理中，萝卜、油菜和黄瓜可食用部位的Pb含量分别是非污染土壤处理的1.54、1.35倍和1.33倍。大气降尘显著影响了油菜茎叶Pb含量，交通区较农业区高出49.69%，但对萝卜根系和黄瓜果实Pb含量无显著影响。在露天种植下，油菜茎叶Pb含量是大棚种植的1.37倍，黄瓜果实Pb含量也比大棚种植高出46.24%，而萝卜根系Pb含量在两种种植方式间无显著差异。在不同污染程度土壤和大气环境中，萝卜根茎Pb积累以土壤驱动为主，土壤贡献率为大气降尘贡献率的3.81~20.74倍；油菜茎叶的Pb积累则受大气降尘主导（农业区种植情况除外），大气降尘贡献率为土壤贡献率的1.01~2.52倍；黄瓜果实中Pb积累受土壤影响更大（污染土壤交通区种植情况除外），土壤贡献率为大气降尘贡献率的1.94~5.00倍。综上所述，土壤与大气降尘对蔬菜Pb积累的贡献因蔬菜类型、土壤污染程度和大气环境而异，代表性的根菜和果菜类的可食用部位Pb积累主要来源于土壤，而叶菜类可食用部位Pb积累主要来源于大气降尘。 |
| 英文摘要: |
| In order to explore the contribution of soil and atmospheric dust-fall to Pb accumulation in different types of vegetables, this study selected non-polluted（pH 6.0, Pb content 28.9 mg·kg-1）and polluted（pH 6.5, Pb content 131.8 mg·kg-1）soils, combined with atmospheric environment from both traffic area and agricultural area, to examine the effects of soil and atmospheric dust-fall on Pb accumulation in the edible parts of radish（Raphanus sativus L., root vegetables）, rape（Brassica napus L., leafy vegetables）and cucumber （Cucumis sativus L., fruit vegetables）. The results showed that the Pb content and bioavailability in polluted soil were 4.55 and 5.07 times those in non-polluted soil, respectively. The atmospheric Pb dust-fall and its bioavailability in the traffic area were 3.19 and 3.09 times those in the agricultural area, respectively. The effects of soil Pb pollution and atmospheric dust-fall on Pb content in edible parts of three vegetables were different. In the polluted soil treatment, the Pb content in the edible parts of radish, rape and cucumber was 1.54, 1.35 times and 1.33 times that of the non-polluted soil treatment, respectively. The atmospheric dust-fall significantly affected the Pb content of rape stems and leaves, which was 49.69% higher in the traffic area than in the agricultural area, but had no significant effect on the Pb content of radish roots and cucumber fruits. Under open-air planting, the Pb content of rape stems and leaves was 1.37 times higher than that of greenhouse planting, and the Pb content of cucumber fruits was 46.24% higher than that of greenhouse planting, while the Pb content of radish roots was not significantly different between the two planting methods. In soils and atmospheric environments with different pollution levels, Pb accumulation in radish rhizomes was primarily attributed to soil, with the contribution rate of soil being 3.81- 20.74 times greater than that of atmospheric dust-fall. The accumulation of Pb in rape stems and leaves was dominated by atmospheric dust-fall（except for plants grown in agricultural areas）, with the contribution rate of atmospheric dust-fall being 1.01-2.52 times that of soil. The accumulation of Pb in cucumber fruits was more affected by soil（except for those grown in the traffic area of polluted soil）, with the contribution rate of soil being 1.94-5.00 times that of atmospheric dust-fall. In summary, the contribution of soil and atmospheric dust-fall to Pb accumulation in vegetables varies with vegetable type, soil pollution degree, and atmospheric environment. Pb accumulation in edible parts of representative root vegetables and fruit vegetables originate primarily from soil, whereas that in leaf vegetables is mainly derived from atmospheric dust-fall. |
| HTML
View Full Text
View/Add Comment Download reader |
| Close |
|
|
|
