摘要
采用物理化学相结合的方法对海泥吹填土进行脱盐改土试验。土柱试验结果表明:混合掺拌脱硫石膏和麦糠能够显著改善土壤的理化性质和渗透性能,处理3的入渗速率是对照组的18倍;脱盐过程表现为快速脱盐、缓慢脱盐和基本稳定三个阶段;最终土壤全盐量的淋洗效率在90%以上,其中Na+和Cl-达98%以上;添加脱硫石膏明显抑制了脱盐碱化现象。各处理相比较以处理3(1%脱硫石膏+20%麦糠)为佳,渗透快、脱盐率高,土水比为1∶1.42,改良后的土壤能够满足植物生长的基本需要。
The physico-chemical method was adopted to improve the dredger fill by desalination experiments. The results of soil column experiments showed that the mixed adding of desulfurizated gypsum and wheat bran could obviously improve the physico-chemical properties and permeability of the soil, the infiltration rate of treatment 3 was 18 times of control; Desalination process was characterized by three phases., rapid de- salting, slow desalting and basically stable; finally, the leaching efficiency of total salt in soil was over 90%, Na＋ and C1- were more than 98% Adding desulfurization gypsum obviously inhibited the phenomenon of salinization. Compared with each treatments, treatment 3 （desulfurization gypsum 1% q-wheat 20%） was the best, with fast penetration, high desalination rate, soil and water ratio was 1 ＂ 1.42, the improved soil could meet the basic needs of plant growth.
出处
《水土保持学报》
CSCD
北大核心
2014年第2期281-284,291,共5页
Journal of Soil and Water Conservation
基金
"天津港海泥吹填地原土区柽柳植被构建技术研究"项目资助
关键词
吹填土
盐碱土改良
脱硫石膏
水盐运动
dredger fill
improvement of saline soil
desulfurization gypsum
water and salt movement
