河南科技大学学报（自然科学版）2025，Vol.46Issue(6)：79-88,10.DOI:10.15926/j.cnki.issn1672-6871.2025.06.009
适量施硒缓解高浓度聚丙烯纳米塑料对紫花苜蓿的胁迫
Moderate Application of Selenium Alleviates the Stress of High Concentration Polypropylene Nanoplastics on Alfalfa
摘要
Abstract
This study aims to explore the regulatory mechanism and repair effect of selenium on the physiological response of alfalfa(Medicago sativa)under the stress of polypropylene nanoplastic.It provides a theoretical basis for the phytoremediation of microplastic-contaminated soil.A pot experiment was conducted.An interaction model was constructed with PP-NPs(100 nm,1%)and soil selenium mass ratio gradients(0,0.4,0.8,1.2,1.6 mg·kg-1).The responses of growth indices,chlorophyll content,photosynthetic parameters,nutritional quality,and root parameters of alfalfa(75 d growth cycle)were systematically evaluated.The results show that the addition of PP-NPs significantly inhibits the plant height,aboveground biomass,net photosynthetic rate,stomatal conductance,and contents of chlorophyll a and chlorophyll b of alfalfa(P<0.05),which are decreased by 9.8%,3.3%,35.4%,49.5%,11.3%,and 10.7%,respectively.The addition of selenium can alleviate the toxic effects of PP-NPs and significantly increase the net photosynthetic rate and chlorophyll content of alfalfa(P<0.05).A membership function evaluation system based on principal component analysis is established using 5 indicators,including aboveground biomass,dry matter content,crude protein content,acid detergent fiber content,and neutral detergent fiber content.It is quantitatively concluded that the 1.2 mg·kg-1 selenium treatment performed best in comprehensive indicators.The results of the study show that selenium improves the stress resistance and productivity of alfalfa under PP-NPs pollution through photosynthetic gain and root architecture remodeling.This provides a new technical pathway for high-quality forage production in microplastic-contaminated agricultural areas.关键词
聚丙烯纳米塑料/紫花苜蓿/硒/营养成分/产量Key words
polypropylene nanoplastics/Medicago sativa/selenium/nutritional composition/production分类
农业科技引用本文复制引用
孙平,郑鑫淼,朱文琰,郭紫瑞,李捷,徐世晓..适量施硒缓解高浓度聚丙烯纳米塑料对紫花苜蓿的胁迫[J].河南科技大学学报（自然科学版）,2025,46(6):79-88,10.基金项目
国家自然科学基金项目(32102585) （32102585）
青海省重点研发与转化计划项目(219-NK-173) （219-NK-173）
青海省帅才科学家项目(2024-SF-102) （2024-SF-102）
