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| 生物炭施加对矿区土壤养分及植物生长的影响 |
| Effects of Biochar Application on Soil Nutrients and Plant Growth in Mining Areas |
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| DOI： |
| 中文关键词: 生物炭 土壤养分 植物生长 重金属 铁矿区 |
| 英文关键词: Biochar Soil nutrient Plant growth Heavy metals Iron mining area |
| 基金项目:国家自然科学基金资助项目（42301236）；山西省高等学校科技创新基金资助项目（2020L0508）；山西省回国留学人员科研基金资助项目（2021-146）；山西省基础研究计划基金资助项目（202303021222215） |
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| 摘要点击次数: 27 |
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| 中文摘要: |
| 以山西忻州—吕梁带典型废弃铁尾矿库土壤为实验对象，施加5%比例的稻壳生物炭、椰壳生物炭、玉米秸秆生物炭和竹子生物炭，探究其对苜蓿种植后土壤养分含量、种子发芽率、生物量及重金属富集的影响。结果表明：施加生物炭可显著提升土壤全磷、全氮、有机质、速效磷、碱解氮含量，其中椰壳和玉米秸秆生物炭的改良效果更为显著；生物炭施加显著提高了苜蓿发芽率和生物量累积，降低了植物对Pb、Cr、As的富集，相关性分析进一步揭示土壤养分提升是降低植物重金属富集的重要因素。 |
| 英文摘要: |
| Taking the soil from typical abandoned iron tailings ponds in Xinzhou Lvliang area of Shanxi Province as the experimental object， alfalfa was planted after adding 5% rice husk biochar， coconut shell biochar， corn straw biochar and bamboo biochar to the soil， the effects of the application of these biochar on soil nutrient content， seed germination rate， biomass and heavy metal enrichment were studied. The results showed that the application of biochar significantly increased the contents of total phosphorus， total nitrogen， organic matter， available phosphorus and alkali hydrolyzable nitrogen in the soil， among them， the improvement effects of coconut shell and corn straw biochar were the most remarkable. It also significantly increased the germination rate and biomass accumulation of alfalfa， and significantly reduced the enrichment of Pb， Cr and As by plants. Correlation analysis further indicated that the improvement in soil nutrients was an important factor in reducing the enrichment 〖GK!87mm〗of heavy metals in plants. |
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