稀土元素La对油菜某些生理指标的影响及其临界浓度  

Effects of Rare Earth La on Some Physiological Indices of Rape and Its Critical Concentration.

作　　者：曾青[1] 朱建国[1] 谢祖彬[1] 褚海燕[1] 曹志洪[1] 

机构地区：[1]中国科学院南京土壤研究所土壤圈物质循环开放实验室,江苏南京210008

出　　处：《农村生态环境》2001年第3期26-29,共4页Rural Eco-Environment

基　　金：国家自然科学基金重大项目 ( 2 9890 2 82 );中国科学院红壤试验站开放基金 ( 2 0 0 0k0 6)资助

摘　　要：通过水培试验 ,研究了稀土元素La对油菜生物量和叶绿素含量、硝酸还原酶活性、根系活力、POD活性等一系列生理指标的影响。结果表明 :喷施或根施 0 0 3～ 3mg/kg的La3+对油菜的生长起了一定的促进作用 ,表现为生物量、叶绿素含量、硝酸还原酶活性和根系活力增加 ;而高于 3 0mg/kg浓度的La3+对油菜的生长产生了抑制作用 ,油菜生物量、叶绿素含量、硝酸还原酶活性和根系活力降低 ,POD活性增高。La对油菜的临界浓度为 3 0mg/kg。Effects of lanthanum on the growth and some other physiological indices of rape (Brassica juncea),such as biomass,chlorophyll content,nitrate reductase,root activity,were studied in a solution culture experiment.The results showed that the biomass,chlorophyll content,nitrate reductase activity and root activity increased when 0 03～3 mg/kg La 3+ was sprayed or added into the culture solution,and decreased,but POD activity,when more than 30 mg/kg La 3+ was added.The critical concentration of lanthanum to rape was suggested to be 30 mg/kg.

关 键 词：稀土元素 油菜 LA 生理指标 临界浓度 镧 

分 类 号：X835[环境科学与工程—环境工程] X592