摘要
利用火力发电厂湿法烟气脱硫的副产品脱硫石膏(CaSO4.2H2O)治理滨海盐碱地,是滨海盐碱土地区开发利用土地资源进行城市绿化的一条重要途径,它既回收利用了资源,又促进了城市生态绿化建设。选择天津滨海盐土,通过盆栽试验研究了不同脱硫石膏施用量及灌溉量对滨海盐碱地上高羊茅生长的影响。试验设计了20个处理,3个脱硫石膏施用水平及一个对照组,5个灌溉水平。结果表明:(1)脱硫石膏施用量为450g/m2时高羊茅种子的出苗率最高,比不施脱硫石膏增加了21.73%,并且苗期生长速度快;(2)高羊茅的叶片宽度分别在脱硫石膏施用量为300g/m2和灌溉量100%田间持水量时最粗,盖度在脱硫石膏施用量450g/m2且灌溉量80%田间持水量时最高,而色泽在脱硫石膏施用量为300g/m2且灌溉量60%田间持水量时最佳;(3)表层土壤和底层土壤根量,在脱硫石膏量为150g/m2、灌溉量分别为90%田间持水量和80%田间持水量时最多。
Coastal saline land control by using Flue Gas Desulfurization gypsum （CaSO4 · 2H2O）, a byproduct of the flue gas desulfurization in thermal power plant, is an important way to explore and utilize land resource for urban greening in coastal saline soil area. It can not only recycle resources, but also make city green. Taking Tianjin coastal saline soil as an example, a pot experiment was conducted to study the effects of different amount of FGD gypsum application and irrigation on growth of tall fescue （Festuca arundinacea Schreb. ） in coastal saline soil. 20 treatments were designed in the experiment, five irrigation levels, three FGD gypsum levels and a control group. The results indicated that （1）when FGD gypsum ap- plication amount was 450g/m, emergence rate was the highest and raised by 21.73% compared with the control and the growth in seedling stage was accelerated; （2）when FGD gypsum application amount was 450g/m and irrigation amount was 100% field capacity respectively, the leaf was the widest; when FGD gypsum application amount was 450g/m coupling with irrigation amount of 80% field capacity, the turf coverage was the highest; when FGD gypsum application amount was 300g/m coupling with irrigation a- mount of 60% field capacity, the turf color was the best; （3）the root biomass in the upper and lower lay ers were the largest when FGD gypsum application amount was 150g/m, and irrigation amount was 90% field capacity and 80% field capacity respectively.
出处
《中国草地学报》
CSCD
北大核心
2013年第3期103-109,共7页
Chinese Journal of Grassland
基金
北京市大学生创新计划课题(S111002201)
关键词
高羊茅
滨海盐土
脱硫石膏
灌溉
Tall rescue
Coastal saline soil
FGD gypsum
Irrigation
