| Salinization has become a worldwide problem, and its recovery is a main field for experts. The treatment of strongly saline-alkaline soil is one of the most difficult subjects, and few scholars have worked on this. Together with the economic and technological reasons, no significant development has been gained.This paper managed to meliorate the strongly saline-alkaline soil with the industrial waste -furfural residue, and to test the phytoremediation with plants which can collect salts and fix nitrogen, so as to find a effectual way that adapt to the local situation.This paper chose bare saline-alkali patch (pH≈10) as a case, analyzed the melioration effects of furfural residue in laboratory, and then educed the optimal quantity that should be added into the soil. In field, Atriplex horuensis L., Hordeum brevisubulatum and Medicago sativa L. were planted after the mix of furfural-residue and soil and irrigation. The physical-chemical properties of both plants and soil were measured periodically.The simulation in lab indicated that furfural-residue could improve the soil quality effectively. It reduced the content of CO32- and HCO3-, and the pH decreased from 10.5 to 8.42 when the ratio of furfural-residue and soil reached 7.5%. The Cl- in soil decreased, K+,TN and organic matter increased, which can speeded the growth of plants. At the same time, SO42- Ca2+ and Mg2+increased, but it will not do harm to plants with the determinate quantity.The phytoremediation experiment in field demonstrated that all the three plants could grow in the soil after the amelioration with furfural-residue, and these plants could reduce the salinity, improve the soil quality and fertility. Because the growing season of plants was very short (less than 2 month) and the optimal growing season was missed, thus the yield was much low and the phytoremediation effects were not significant More over, the periods of thytoremediation are long in itself, some relevant research will be furthered in future.
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