8Bernal M P,Grath S P.Effects ofpH and heavy metals con-centrations in solu-tion culture on the proton release,growth and elemental composition of Alyssummurale and Raphanus sativus[J].Plant Soil,1994,166:83-87.
9Hassani N.Potential Pb Cd Zn and B contamination of sandy soils after different irrigation periods with sewage effluent[J].Water Air Soil Pollut,1993,66(3):239-243.
10Kahle H.Response of roots of trees to heavy metals[J].Environ ExperiBot,1993,(33):99-101.
