The Growth of Four Fiber Crops in the Soils of Lead-zinc Mining Area and Their Enrichment Effects on Heavy Metals

XU Zhiyong; CHEN Funing; ZHAO Quyun; HUANG Peng; YAO Jinglin; HU Wei

doi:10.15933/j.cnki.1004-3268.2025.05.008

Abstract：In order to determine the possibility of fiber crops to repair lead-zinc contaminated soil,a pot experiment was conducted to study the growth characteristics of cotton,velvetleaf,jute and flax in polluted soil of lead-zinc mining area,and their potential to repair polluted soil in lead-zinc mining area was analyzed.The results showed that except flax,cotton,velvetleaf and jute could all grow in polluted soil of lead-zinc mining area,and the physiological and biochemical indexes including chlorophyll level,chlorophyll fluorescence parameters(Fv/Fm、ФPSⅡ)were damaged for cotton and velvetleaf,and photosynthetic parameters(AN,Gs)were damaged for cotton,velvetleaf and jute growing in polluted soil of lead-zinc mining area.The decrease of AN in cotton and velvetleaf growing in polluted soil of lead-zinc mining area was mainly caused by non-stomatal factors,while that in jute was caused by stomatal factors.In addition,the aboveground biomass of cotton and velvetleaf growing in polluted soil of lead-zinc mining area decreased significantly by 38.5％and 63.9％,respectively,and the underground biomass of velvetleaf growing in polluted soil of lead-zinc mining area decreased significantly by 29.4％,while these of jute had no change,and the tolerance to lead and zinc was ranked as jute,cotton and velvetleaf.The enrichment coefficients of lead and zinc in jute were equal to cotton and significantly higher than that of velvetleaf.The transport coefficients of lead and zinc of cotton,velvetleaf and jute were all greater than 1,but the transport coefficient of jute was larger than those of cotton and velvetleaf.It can be seen that jute is a dominant crop that can be grown on lead-zinc heavy metal polluted soil.Therefore,according to the analyses of growth conditions,photosynthetic parameters,fluorescence parameters and heavy metal enrichment ability,the cotton,velvetleaf and jute can all grow in lead-zinc polluted soil,and jute is more suitable for the remediation of heavy metal polluted soil dominated by lead and zinc.