摘要
[目的]为粉煤灰在碱化土壤改良中的合理应用提供指导。[方法]采用已知化学元素的粉煤灰改良已知化学成分的碱化土壤,研究灌水量、改良深度、电厂废渣与土壤处理方式等对土壤改良效果的影响。[结果]粉煤灰可改善碱化土壤的物理性质,降低其碱化度,增强土壤的吸热能力,提高地温,有利于微生物活动、养分转化和种子萌发;粘质土壤中施入粉煤灰后,土壤粘粒含量降低,沙粒含量增加;粉煤灰的施用带来了一定程度的重金属污染(Se含量偏高等),破坏了植物根系对营养成分的吸收,通过添加有机质和复合肥等措施可防止其不利影响。[结论]采取合理措施可减少粉煤灰对土壤的不利影响。
[Objective ] The study was to provide the guidance for reasonable application of coal ash in alkaline soil improvement. [ Method] The alkaline soil which chemical constituents were known was improved by coal ash which chemical elements were known, the effects of irriga- tion amount,improvement depth and treatment methods of waste residue t＇rom power plant and soil on improvement effect of soil were studied. [ Result ] Coal ash could improve the physical properties of alkaline soil and decrease its alkalinity,and increase the heat absorption capacity of soil and ground temperature,which was beneficial to microbial activity, nutrient transformation and seed germination. When coal ash was added in clayey soil,the clay particle content was decreased and the sand particle content was increased. The application of coal ash caused heavy metal pollution in some degree （Se content was too high etc. ） and damaged nutrient absorption of plant roots,but when organic matter and compound fertilizer were added,the adverse effect could be prevented. [ Conclusion] Taking reasonable measure could reduce the adverse effect of coal ash on soil.
出处
《安徽农业科学》
CAS
北大核心
2009年第34期16945-16947,共3页
Journal of Anhui Agricultural Sciences
基金
国家科技部农村黑臭水体资源化治理技术研究与应用(400-095469)
湖北省自然科学基金立项项目(400-092479)
湖北大学教学改革项目(400-013385)
关键词
粉煤灰
碱化土壤
重金属污染
Coal ash
Alkaline soil
Heavy metal pollution
