【摘要】 用欧洲经济合作发展组织 (OECD)提出的方法 ,在 3种土壤 (红壤、黄潮土、黄褐土 )上进行了混合稀土 (浓度 0～ 5 0g·kg- 1 )对 3种作物 (水稻、油菜、大豆 )相对生长量影响的试验。从半效应浓度 (EC5 0 )值看 ,在供试条件下 ,混合稀土对红壤上水稻和油菜以及黄潮土上大豆生长量的抑制作用较大 ,毒性相对也较强。与Hg ,Cd ,Pb ,As等重金属相比 ,混合稀土对作物的毒性很小。更多还原

【Abstract】 The effects of rare earth on the growth of three crops (rice, rape, soybean) in three kinds of soils (red soil, yellow fluvo-aquic soil, yellow cinnamon soil) were studied by organization for economic co operation and development (OECD) method, and the EC50 (median growth concentration) values were obtained. The inhibition of RE on the growth of rice and rape in red soil and on the growth of soybean in yellow fluvo aquic soil is higher with stronger poison effects. Compared with other heavy metals such as Hg, Cd, Pb, As, the poison of RE on crops are weaker.更多还原