| 明春艳,何澍然,陈林康,李鑫伟,叶媛媛,宋世杰,龙光强,赵平.不同微塑料含量暴露下间作对大豆根系和养分吸收的影响[J].农业环境科学学报,2025,44(8):2110-2119. |
| 不同微塑料含量暴露下间作对大豆根系和养分吸收的影响 |
| Effects of intercropping on soybean roots and nutrient uptake under different microplastic concentrations |
| 投稿时间：2024-08-19 |
| DOI：10.11654/jaes.2024-0695 |
| 中文关键词: 间作 微塑料含量 根系形态 生长发育 养分吸收量 |
| 英文关键词: intercropping microplastic concentration root morphology growth and development nutrient uptake |
| 基金项目:国家重点研发计划项目（2022YFD1901503） |
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| 中文摘要: |
| 为探究不同微塑料含量暴露下间作对大豆根系形态特征和养分吸收的影响，以及间作缓解微塑料毒害效应的机理机制，本研究通过盆栽实验，设置0%、0.1%、1%、10% 4个微塑料含量和大豆单作、玉米大豆间作2种种植模式，于播种30 d和60 d后对大豆的各生长指标、根系特性、养分累积吸收量和土壤理化性质进行测定分析。结果表明：与不添加微塑料相比，微塑料暴露显著增加了大豆总根长，但降低了根系平均直径和根系活力，减少了大豆氮、磷、钾累积吸收量和总生物量。与相同微塑料含量下的大豆单作相比，间作显著提高了大豆总根长23.2%、总根表面积39.8%和根系活力49.2%，同时，增加了大豆氮、磷、钾累积吸收量35.6%、29.5%、32.0%。相关性分析表明，总根长、根系活力、硝态氮、速效磷和速效钾含量是影响大豆生长和养分吸收的主要因素。研究表明，间作可以通过改善大豆根系性状和土壤养分有效性来缓解微塑料对大豆生长发育和养分吸收的抑制作用。间作调控微塑料对作物生长发育的抑制表现出“时间效应”，即间作的缓解作用随作物生育期的延长而增强。 |
| 英文摘要: |
| In order to explore the effects of intercropping on root morphological characteristics and nutrient uptake of soybean under different concentrations of microplastics, and the mechanism of intercropping to alleviate the toxic effects of microplastics, in this study, four concentrations of microplastics（0%, 0.1%, 1%, 10%） and two planting patterns（soybean monoculture and maize-soybean intercropping）were set up by pot experiment. After 30 days and 60 days of sowing, the growth indexes, root characteristics, nutrient accumulation and absorption and soil physical and chemical properties of soybean were measured and analyzed. Compared with no microplastics, microplastics exposure significantly increased the total root length of soybean, but decreased the average root diameter and root activity, and reduced the cumulative uptake of nitrogen, phosphorus and potassium and total biomass of soybean. Compared with soybean monocropping at the same microplastic concentration, intercropping significantly increased the total root length 23.2%, total root surface area 39.8% and root activity 49.2% of soybean, and increased the cumulative uptake of nitrogen 35.6%, phosphorus 29.5% and potassium 32.0% of soybean. Redundancy and correlation analysis showed that total root length, root activity, nitrate nitrogen, available phosphorus and available potassium were the main factors affecting soybean growth and nutrient uptake. Intercropping can alleviate the inhibitory effect of microplastics on soybean growth and nutrient uptake by improving soybean root traits and soil nutrient availability. Moreover, the inhibition of crop growth and development by intercropping regulation of microplastics showed a“time effect”, that is, the mitigation effect of intercropping increased with the extension of crop growth period. |
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