海砂和电石渣对吹填土理化性状的影响及水盐动态研究  

Effects of Sea Sand and Calcium Carbide Waste on Physical and Chemical Properties of Dredged Sediments and Its Water-Salt Dynamics

作　　者：柯丽丽[1,2] 黄明勇[2] 苏德荣[1] 邹桂梅[1,2] 

机构地区：[1]北京林业大学省部共建"森林培育与保护"教育部重点实验室,北京100083 [2]天津泰达园林建设有限公司,天津300457

出　　处：《水土保持学报》2010年第2期92-95,101,共5页Journal of Soil and Water Conservation

基　　金：国家科技支撑计划项目(2007BAD67B03)

摘　　要：以吹填土、海砂、电石渣为材料,采用土柱模拟实验研究吹填土:海砂:电石渣=0.55:0.40:0.05比例的混合基质淋洗脱盐下的水盐动态,脱盐后基质的理化性质,以确定是否适合做园林绿化土壤。结果表明:基质的水盐运移可分为盐峰的形成、下移和消失3个阶段;脱盐深度与各层淋洗水量呈直线相关关系(y=0.0028x-3.2675(R2=0.9124))提供了淋洗定额的参考价值;脱盐后0-60cm和60-140cm深度的土层,盐分离子组成分别为Ca2+-HCO3-、SO42-型和Ca2+-SO42-型;通体质地为细砂土,通气透水性强;也没有脱盐碱化的现象;基质肥力水平较低。可见3种材料采用该比例做园林绿化基质是可行的,但是脱盐后培肥等配套措施至关重要。With dredged sediment,sea sand and calcium carbide waste being taken as the material,this test is designed to measure water salt movement and physical chemical properties after desalting and desalted alkalization of artificial soil,which was mixed dredged sediment,sea sand and calcium carbide waste with the ratio of 0.55：0.40：0.05,were studied under steadily infiltrated condition.The results showed that three salt peak periods were found：the forming stage,the moving down stage and the disappearing stage.A linear correlation （y=0.0028x-3.267 5（R2=0.912 4））was found between the water used and desalination depth,from which the approximate amount of water required in leaching can be drawn.After desalination ionic components were Na^＋,Ca^2＋-Cl^-,CO3^2-to Ca^2＋-HCO3^-,SO4^2-at the depth of 0-60 cm and Na^＋,Ca^2＋-Cl^-,CO3^2-to SO4^2-at the depth of 60-140 cm.After desalination the texture of the mixed matrix was of fine sand soil and no desalted alkalization was found.Based on our results,the mixed matrix can use as a plant growth medium and the lower fertility showed that soil fertilization was an important measure.

关 键 词：吹填淤泥 电石渣 水盐动态 

分 类 号：S156.4[农业科学—土壤学]