摘要
滨海盐土生态治理成功的关键在于有效调控土壤盐分。通过田间试验,研究了以暗管排水技术为主的综合改良措施对滨海盐土的生态治理效果。研究结果表明,综合改良措施明显改善土壤通气透水能力,提高土壤综合肥力,改良半年后栽植带土壤渗透系数由改良前的0.78×10-5cm/s增加到8.74×10-4cm/s,有机质含量由8.83 g/kg增加到26.4 g/kg;暗管排水措施能有效排除淋洗下渗水及土壤盐分,改良40天后栽植带0～60 cm土层土壤脱盐率达到88.5%;栽植3年后的国槐(Sophora japonica Linn)、绒毛白蜡(Fraxinus velutina Torr)、臭椿(Ailanthus altissima)成活率分别为93.33%、83.33%和73.33%,成活植株生长正常。
The effective control of soil salt is the key to the success in afforesting of coastal saline soil. In this paper, a new comprehensive improvement measure with subsurface drainage for afforesting of coastal saline soil was investigated by field experiments. The results showed that the comprehensive measures improved the soil permeable ability and fertility significantly, and soil permeability coefficient got up to 8.74 × 10-4 em/s from 0.78 × 10-5 cm/s and organic matter content increased from 8.83 g/kg to 26.4 g/kg after six-month improvement in tree-planting zone. The seepage of leaching water and soil salt could be eliminated from soil mass quickly and effectively by the subsurface drainage measure, and desalination rate of 0 -60 cm soil layer in a tree-planting zone reached 88.5% after forty days. The planting survival rates of Sophora japonica Linn, Sraxinus velutina Ton＇, Ailanthus altissima were 93.33%. 83.33% and 73.33% respectively after three years.
出处
《城市环境与城市生态》
CAS
2013年第1期29-32,共4页
Urban Environment & Urban Ecology
基金
国家科技支撑计划项目"天津滨海新区生态绿化暗管改碱关键技术研究与示范"(2009BAC55B03)
关键词
滨海盐土
暗管排水
土壤改良
绿化
coastal saline soil
subsurface drainage
soil improvement
afforesting
