摘要
高炉渣是炼铁过程中产生的副产品,含有丰富Ca、Si、Mg、Fe等植物生长所需的矿质元素,在农林领域应用前景广阔。以高炉渣为研究对象,将高炉渣与泥炭土混合后开展淋溶实验和马尼拉草盆栽实验,通过测定高炉渣与泥炭土混合物淋溶液元素溶出浓度,确定马尼拉草生物量、株高、根系形态等植物生长指标和叶绿素、可溶性糖和可溶性蛋白含量等生化指标,研究了高炉渣对土壤-马尼拉草生态系统的影响。结果表明:添加少量高炉渣会提升土壤中Si、Fe、Mn的溶出浓度,但当高炉渣添加量高于4%时,会造成土壤碱化、贫钾、贫磷和富铝化。当高炉渣添加量不高于4 wt.%时,土壤中高炉渣的加入会促进马尼拉草根系的发育,提高叶绿素、可溶性糖和可溶性蛋白的含量,进而促进其生长。与对照组相比,土壤中高炉渣添加量为4%时,马尼拉草的株高和生物量分别提升了19%和35%,可起到较好的固碳释氧效果。
Blast furnace slag(BFS)is a by-product produced in the process of ironmaking,which enriched in Ca,Si,Mg,Fe and other mineral elements for plant growth.BFS has a broad application prospect in the field of agriculture and forestry.In this work,BFS was taken as the research object.The leaching experiments and Manila grass potting experiments were performed using BFS and peat soil mixture.The effect of BFS on soil-Manila grass system was investigated by determining element leaching concentration of the BFS and peat soil mixtures,and plant growth indexes such as biomass,plant height,root morphology,etc.,as well as biochemical indexes of chlorophyll,soluble sugar,and soluble protein content of Manila grass.The obtained results showed that the low addition rates of BFS enhanced Si,Fe and Mn leaching concentrations of soil.The addition rate of BFS higher than 4 wt.%resulted in soil alkalization,potassium depletion,phosphorus depletion and alumina enrichment.The root growth of Manila grass was promoted and the chlorophyll,soluble sugar and soluble protein contents increased when the BFS addition rate was lower than 4 wt.%.Compared with control,the plant height and biomass of Manila grass increased by 19%and 35%,respectively,when the addition rate of BFS was 4 wt.%.Using BFS as a mineral fertilizer for Manila grass planting is beneficial to carbon sequestration and oxygen releasing.
作者
侯宗斌
李俊国
李贵虎
段路阳
杨子豪
刘宝
HOU Zong-bin;LI Jun-guo;LI Gui-hu;DUAN Lu-yang;YANG Zi-hao;Liu Bao(College of Metallurgy and Energy,North China University of Science and Technology,Tangshan Hebei 063210,China)
出处
《华北理工大学学报（自然科学版）》
CAS
2024年第3期1-9,共9页
Journal of North China University of Science and Technology：Natural Science Edition
基金
河北省自然科学基金创新研究群体项目(E2022209093):冶金渣用于碳捕集利用与封存
唐山市科技计划项目(22130228H):碳酸化钢渣矿质元素在渣-土壤-植物系统中的迁移与赋存机制
中央引导地方科技发展资金项目(236Z1102G):Ti/TiNx/IrO2阳极的可控构筑及电催化析氧性能研究。
关键词
高炉渣
渣肥
矿质元素
溶出行为
马尼拉草
blast furnace slag
slag fertilizer
mineral elements
leaching behavior
manila grass
