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| 不同形态大气铅沉降对茄苗生长和铅积累特征影响 |
| Effects of Pb deposited from the atmosphere on the growth and Pb accumulation characteristics of eggplant seedlings |
| Received:July 04, 2022 Revised:August 16, 2022 |
| DOI：10.13254/j.jare.2022.0439 |
| 中文关键词: Pb沉降，茄苗，叶沉降，Pb累积，迁移率 |
| 英文关键词: Pb deposition, eggplant seedling, leaf settlement, Pb accumulation, mobility |
| 基金项目:国家重点研发计划项目（2016YFD0201004） |
| Author Name | Affiliation | | ZHANG Dageng | College of Land and Environment, Shenyang Agricultural University, Shenyang 100866, China | | LI Jie | College of Land and Environment, Shenyang Agricultural University, Shenyang 100866, China | | YAO Zhongli | College of Land and Environment, Shenyang Agricultural University, Shenyang 100866, China |
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| 中文摘要: |
| 为探明不同形态大气沉降 Pb对作物幼苗生长和 Pb积累的影响，本研究采用盆栽种植试验，研究了 PbS、PbSO4和 PbO2溶液叶面直接沉降和土表沉降对茄苗干质量和植株 Pb积累量及迁移率的影响。结果表明，叶面沉降 PbO2降低了茄苗叶片的气孔导度，减少了茄苗根茎叶干质量，PbS、PbSO4均未显著影响茄苗生长。叶面和土表沉降Pb均能增加茄苗Pb含量，3种形态Pb由叶面向茄苗的迁移率表现为小颗粒PbS（87.01%）>离子态PbSO（4 50.78%）>大颗粒PbO（2 50.44%），由叶向茎的迁移率均低于2%，Pb主要积累在茄苗叶中。3种形态土表沉降Pb由土壤向茄苗的迁移率均低于1%，均未对茄苗生长产生显著影响。研究表明，大气不同形态 Pb沉降条件下，小颗粒态 Pb更易由叶面进入植物体，离子态 Pb更易在植株体内迁移，叶面沉降 Pb对茄苗 Pb积累贡献较大，土表沉降则相对较小。 |
| 英文摘要: |
| This study aimed to investigate the effects of Pb deposited from the atmosphere on the growth and Pb accumulation characteristics of eggplant（Solanum melongena L.）seedlings. A potted planting simulation test was carried out using eggplant as the test crop. The effects of precipitated Pb on seedling growth and its accumulation and migration characteristics within the eggplant were studied by adding PbS, PbSO4, and PbO2 solution to the surface of the leaf and soil. The results showed that both leaf and soil surface settling Pb stress could increase the Pb content of eggplant seedlings. The migration rate of Pb from the leaf to the seedling was PbS（87.01%）>PbSO4 （50.78%）>PbO（2 50.44%）. The migration rate of Pb from leaf to stem was lower than 2%. Pb primarily accumulated in the eggplant leaves. PbO2 settling on leaves decreased the stomatal conductance and dry mass of the eggplant seedlings, but PbS and PbSO4 did not significantly affect their growth（P<0.05）. The migration rate of Pb deposition from the soil surface to the eggplant seedlings was lower than 1%, which had no significant effect on their growth. Under atmospheric Pb deposition stress, small particle Pb was more likely to enter the plant from the leaf surface, and ionic Pb was more likely to migrate into the plant body. Leaf Pb deposition contributed more to Pb accumulation in the eggplant than soil surface Pb deposition. |
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