钢渣对辽宁地区水稻土壤镉素吸收的影响

硅素肥料降低重金属毒性和减少重金属在植物体内积累的研究报道尚不多见。因此,开展这一领域的研究工作,将为合理应用硅素肥料修复、利用被重金属污染的土壤提供重要的理论依据。试验通过对辽宁不同地区水稻土施加钢渣,来研究钢渣对土壤吸附镉的影响。试验结果表明:施用钢渣能够增加大石桥、辽中、抚顺地区土壤对镉的吸附能力,而对盘锦、康平、苏家屯地区吸附能力影响不大;土壤对镉的等温吸附曲线,符合Langmuir等温吸附方程和Frendlich等温吸附方程,且加入钢渣前后,最大吸附量和吸附常数在不同程度上发生变化。

The Effect of Slag Mucks on Paddy Soil Absorbed in Liaoning Area

The mechanism of the effect of silicon on decreasing accumulation of heavy metal in crop and the poisonous of heavy metal to crop was unclear. Thus, the study of the effect of silicon fertilizer on decreasing the accumulation and poisonous to crop was needed. The effect of slag mucks on soil absorbed Cd was studied by adding different level of slag mucks in experimental soil. The results show that the capability of soil absorbed Cd in the experiment was enhanced in the soils of Dashiqiao, Liaozhong and Fushun Area, but not changed in the soil of Panjin, Kangping and Sujiatun area in Shenyang city. The curve of soil absorbed Cd was in accordance with Langmuir and Frendlich equation. The cadmium adsorption maximum and adsorption constant were changed in different extent after slag mucks.