摘要
溶液培养法研究了不同活度Cd2+对4种植物卷心菜、黑麦草、玉米和白三叶草生长和养分积累的影响．结果表明，随Cd2+活度增加，4种植物的生长速率和干物质产量均下降．白三叶草对Cd2+最敏感；黑麦草和玉米耐性较强；卷心菜在高ACd2+时敏感．Cd2+对Fe、Mn、Cu、Zn、Ca、Mg、P、S等养分积累的影响因植物种类而异．Cd2+降低Fe、Mn、Cu、Zn、Ca、Mg等的积累．P在4种植物中和S在除卷心菜外的3种植物中的积累比对照增加．卷心菜和白三叶草对Cd毒敏感性差异与Fe、Mn、Ca、Mg的积累受Cd2+影响程度不同密切相关．
A solution culture with cabbage, ryegrass, maize and white clover showed that their growthrate and dry matter yield decreased with increasing Cd2+ activity. The tolerance towards Cd2+changed in folowing sequence: cabbage > ryegrass > maize > white clover. For the plant speciestested, Cd2+ decreased their accumulation of Fe, Mn, Cu. Zn, Ca and Mg, but increased P accurnulatbo. All species except cabbage had an increased S accumulation. The difference of cabbage and white clover in sensitivity to Cd toxicity was strongly related to their different accumulation of Fe, Mn, Ca and Mg under the impact of Cd2+.
出处
《应用生态学报》
CAS
CSCD
1998年第1期89-94,共6页
Chinese Journal of Applied Ecology
基金
国家教委回国人员基金
关键词
生长
养分积累
镉
环境污染
Cd^(2+), Growth, Nutrient accumulation
