Position: Home > Articles > Effects of Cd2+ Treatments on the Growth and Cd2+ Distribution in Glycine max Plants
Journal of Hunan Agricultural University(Natural Sciences)
2006,32
(6)
88-91
镉处理对大豆生物量及镉分布状况的影响
作 者：
王志坤;廖柏寒;黄运湘;曾清如
单 位：
中南林业科技大学资源与环境学院;湖南农业大学资源环境学院;浙江林学院理学院
关键词：
添加Cd~(2+);大豆;红壤;河潮土
摘 要：
通过对红壤和河潮土2种土壤的加Cd2+盆栽试验,研究了添加不同外源Cd2+(0.00,0.25,0.50,2.50,5.00,10.0,20.0 mg/kg)对大豆生长发育及镉分布状况的影响.结果表明,(1)2种土壤加Cd2+处理,对大豆株高具有抑制作用.河潮土加Cd2+处理,大豆生物产量及籽粒产量均以添加0.25 mg/kg时最高,添加Cd2+≥0.50 mg/kg时则表现为抑制作用;红壤加Cd2+处理,对大豆生物产量有抑制作用,但添加0.25 mg/kg时可促进籽粒的发育.(2)红壤加Cd2+处理对大豆营养生长及生殖生长的胁迫作用大于添加相同Cd2+处理的河潮土,红壤添加Cd2+2.50 mg/kg时,大豆株高、生物产量及荚果数等均显著低于对照,而河潮土加Cd2+量则为10.0 mg/kg,表明红壤对镉污染的环境容量比河潮土低.(3)大豆幼苗期根部Cd2+含量高于地上部,而Cd2+积累量则受生物产量的影响.在Cd2+添加量相同的条件下,河潮土大豆地上部生物产量高于红壤,地上部Cd2+积累量及转运率也高于红壤,河潮土Cd2+的转运率为50.3%～80.4%,红壤则为45.5%～66.0%.大豆吸收转运到地上部的Cd2+主要分布在茎和叶中,荚壳和籽粒中相对较少,大豆地上部各器官中Cd2+含量的高低依次为茎、叶、荚壳、籽粒.
译 名：
Effects of Cd2+ Treatments on the Growth and Cd2+ Distribution in Glycine max Plants
作 者：
WANG Zhi-kun1,LIAO Bo-han2*,HUANG Yun-xiang3,ZENG Qing-ru3(1.College of Sciences,Zhejiang Forestry University,Hangzhou 311300,China;2.College of Resources and Environment,Central South Forestry and Technology University,Changsha 410004,China;3.College of Resources and Environment,HNAU,Changsha 410128,China)
关键词：
added Cd2+;Glycine max;red soil;alluvial soil
摘 要：
A pot experiment was conducted to study the effects of Cd2+ treatments on the growth and Cd2+ distribution in Glycine max plants in two typical Hunan soils-red soil and alluvial soil.The results showed as follows:(1) Cd2+ treatments inhibited the length of Glycine max plant in two types of soil.The biomass products and grain yields of Glycine max plants increased at low Cd2+ concentrations and declined at high Cd2+ concentrations in alluvial soil,when Cd2+ concentration was 0.25 mg/kg,the biomass and grain yields were the highest.Cd2+ treatments declined the biomass products of Glycine max plant in red soil,but low Cd2+ concentration simulated the grain development of Glycine max in red soil.(2) The effects of Cd2+ stress on growth of Glycine max plants in red soil were more significant than that in alluvial soil.When Cd2+ concentration was 2.50 mg/kg,the length,biomass products,and pods of Glycine max plants decreased significantly compared with control in red soil,and the same results were showed in alluvial soil when Cd2+ concentration was 10.0 mg/kg.This result showed that Cd2+ environmental capacity of red soil is lower than that of alluvial soil.(3) Cd2+ concentration in roots were higher than that in aerial parts of Glycine max seedlings,but Cd2+ accumulation quantities were related with the biomass products of Glycine max seedlings.In the same Cd2+ concentration,Due to the biomass products of Glycine max plants in alluvial soil were higher than that in red soil,Cd2+ accumulation quantities and the transfer rates were higher than that in red soil.Cd2+ transfer rates were 50.3%～80.4% in alluvial soil and 45.5%～66.0% in red soil,respectively.Cd2+content in aerial part of Glycine max plants from root distributed mainly in stem and leaf,and Cd2+content in shell and grain were lower.Cd2+ concentrations in different organs of Glycine max plants were stem>leaf>shell>grain.
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