【摘要】 以盆栽法研究了Ｐｂ，Ｃｄ复合污染对大豆幼苗的影响及Ｌａ对Ｐｂ，Ｃｄ复合胁迫的缓解效应。结果显示，Ｐｂ５００ｍｇ／Ｌ和Ｃｄ１００ｍｇ／Ｌ的混合液严重抑制大豆幼苗代谢与生长。叶面喷施３０ｍｇ／ＬＬａＣｌ３一次，能减轻Ｐｂ，Ｃｄ复合污染造成的伤害。这与Ｌａ能增加大豆幼苗光合速率，提高叶绿素含量与硝酸还原酶活性，降低质膜透性与植株中Ｐｂ，Ｃｄ含量，维持ＴＴＣ还原力等多重作用相关。更多还原

【Abstract】 Mitigative effect of La on Glycine max seedling under combined Pb and Cd pollution was studied through pot culture experiment. The results show that growth and metabolism of Glycine max seedling are inhibited by the solution of Pb 500 mg/L together with Cd 100 mg/L. When 30 mg/L LaCl 3 was used to spray on Glycine max seedling one time, the damage of combined Pb and Cd pollution was reduced. It is proved by the experiment that La improves photosynthetic rate, chlorophyll content and activity of nitrate reductase, reduces cell membrane permeability and contents of Pb and Cd, and keeps TTC reduction ability of Glycine max seedling.更多还原