摘要
[目的]探索一种新型稀土矿山酸性土壤改良方法.[目的]以江西赣州某稀土矿区土壤为研究对象,采用钢渣和有机肥为土壤改良药剂,设置了钢渣2％、有机肥3％、有机肥3％+钢渣2％、有机肥8％、有机肥8％+钢渣2％、空白对照6个处理,研究不同添加量的钢渣与有机质对矿区酸性土壤pH、阳离子交换量、水溶性盐总量、全氮、全磷、全钾、有效磷、水解性氮、速效钾、总孔隙度等理化性质以及白菜种子的发芽和生长情况的影响.[结果]土壤有机质、阳离子交换量、水溶性盐总量、全氮、全磷、水解性氮、有效磷、速效钾、电导率等指标和有机肥的添加量具有正相关关系,总孔隙度在改良前后变化不明显;钢渣可以提高黏粒含量和土壤pH,促进植物的发芽与生长;在植被后期生长过程中,可以通过添加有机肥保证土壤肥力,使稀土矿山的复绿效果得以长期延续.[结论]钢渣是一种改良矿区酸性土壤的有效药剂.
Abstract
[Objective] The aim was to explore a new method for the improvement of acid soil in rare earth mine、[Method] With Jiangxi Ganzhou a rare earth mining area soil as the research object,using steel slag and organic fertilizer as soil improvement agent,setting up 6 treatments including steel slag 2％,organic fertilizer 3％,organic fertilizer 3％ + steel slag 2％,organic fertilizer 8％,organic fertilizer 8％ + steel slag 2％,blank control,effects of different adding amount of steel slag and organic matter on acid soil pH,cation exchange capacity,water soluble salt content,total nitrogen,total phosphorus,total potassium,available phosphorus,hydrolytic nitrogen,available potassium,total porosity were studied,as well as germination and growth situation of Chinese cabbage seeds.[Result] Soil organic matter,cation exchange capacity,water soluble salt content,total nitrogen,total phosphorus,hydrolytic nitrogen,available phosphorus,available potassium,electrical conductivity had a positive correlation with the amount of organic fertilizer,the total porosity was not changed significantly before and after the improvement,steel slag could improve clay content and soil pH,promote plants' germination and growth.In the late stage of vegetation growth,soil fertility could be ensured by adding organic fertilizer,and the virescence effect of rare earth mine could be prolonged.[Conclusion] Steel slag is a kind of effective agent to improve the acid soil in mine area.
国家科技期刊平台
NSTL
维普
万方数据