摘要
为探索暗管排盐技术在苏打盐碱地治理中的适用性,选择大庆地区的苏打盐碱地进行田间试验,研究排盐暗管不同间距(5m,10m,15m)与埋深(0.8m,1m,1.2m)下的盐碱地土壤脱盐效果。结果表明:经3次灌溉淋洗,发现埋设暗管能显著降低耕作层土壤含盐量,暗管埋设间距、埋深越小,平均排水效率越高,排水矿化度越大,土壤脱盐效率越高,改土效果越好。间距5m、埋深0.8m的处理经淋洗后平均排水效率为2.08%,较其他处理至少提高了13.66%;土壤含盐量为0.16%,较其他处理至少降低了23.81%。由此建议大庆地区苏打盐碱土降渍脱盐的地下暗管工程最佳布设参数为间距5m、埋深0.8m,既可以有效排除土壤中盐分,又可以确保耕作层土壤脱盐均匀。
To study the practice of subsurface drain pipe for improving soda saline-alkaline land,A soda saline-alkaline land in Daqing was selected to carry out field experiment and investigate the leaching desalination of different drain pipe spacing（5,10,15 m） and burial depth（0.8,1.0,1.2 m）.The result show that with use of three irrigation leaching and buried drain pipes,the plough layer soil salinity is significantly reduced;furthermore,the smaller the spacing and depth of covered pipe are,the higher the efficiency of the average drainage is;and the greater drainage salinity and the higher the efficiency of the soil desalination are,the better the soil improvement is.Under condition of 5 m spacing and 0.8 m depth after processing with leaching drainage,the average efficiency is 2.08%,increases by 13.66%;the soil salinity is 0.16%,decreases by 23.81%.The best laid spacing parameter of the soda saline-alkaline land down stains desalination is 5 m and the depth of 0.8 m,which can not only effectively exclude soil salinity,but also to ensure the uniformity of the plow layer soil desalination.
出处
《水土保持研究》
CSCD
北大核心
2013年第3期269-272,共4页
Research of Soil and Water Conservation
基金
黑龙江省教育厅科学技术研究项目(11541255)
关键词
暗管排盐
盐碱地
浅密式
covered pipe draining salt
saline and alkaline land
shallow-tight type
