滨海盐土暗管排水降渍脱盐效果研究  

Study on Effects of Subsurface Pipe Drainage on Waterlogging Controlling and Desalination in Coastal Saline Soil

作　　者：周祥 刘永 

机构地区：[1]盐城市土壤肥料技术指导站,江苏盐城224000 [2]滨海县耕地质量与肥料管理站,江苏盐城224000

出　　处：《山东农业科学》2012年第2期72-76,共5页Shandong Agricultural Sciences

基　　金：江苏省财政与省农委专项项目"沿海地区暗管改盐与地力培肥示范区建设"[苏财农(2007)265号]

摘　　要：在江苏省滨海盐土按不同埋深和间距埋设地下暗管,其降渍、脱盐作用主要表现在丰水期(7～9月)内,在试验范围内,10 m间距暗管的降渍效果最显著,但与15 m间距暗管的脱盐效果相差不明显;在较小间距(10 m)时,1.4 m埋深暗管的降渍效果优于1.2 m埋深,埋设间距≥15 m后,埋深对暗管降渍效果无明显影响,而在所有埋设间距处理中,1.4 m埋深暗管的脱盐效果均优于1.2 m埋深。综合比较分析各相关试验结果,并考虑暗管埋设的初期投资和后期维护成本,推荐间距15 m、埋深1.4 m为江苏滨海盐土降渍脱盐的地下暗管工程最佳布设参数。The subsurface drainage plastic pipes were buried according to the designed depth of 1.2 m and 1.4 m and the width of 10 m,15 m and 20 m in typical coastal saline soil plots in Jiangsu Province.The effects on decreasing waterlogging and desalination were mainly detected in the flood season（from July to September）.The waterlogging was significantly reduced by burying subsurface pipes at 10 m of width,but there were no significant differences compared to the treatment with 15 m of width.The effect of subsurface pipes buried at 1.4 m of depth was better than that at 1.2 m of depth when the buried width was 10 m,but no significant differences were found between the different buried depth when the buried width was and higher than 15 m.The effects of subsurface pipe at 1.4 m of depth on desalination were more obvious than that at 1.2 m of depth.Based on the synthetical results of the experiment and the constructing and maintaining costs,the subsurface pipes buried with 15 m of wide and 1.4 m of depth were recommended as the optimal parameters for waterlogging controlling and desalination in coastal saline soil in Jiangsu Province.

关 键 词：滨海盐土 降渍脱盐 塑料暗管 间距 埋深 

分 类 号：S156.42[农业科学—土壤学]