环渤海地区滨海盐碱地不同排盐处理下的台田降盐效率
Drainage Salinity Efficiency under Different Salt Discharge Treatment Conditions over Coastal Saline-alkali Areas
查看参考文献13篇
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文摘
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本文以环渤海区域河北省黄骅市中捷农场的盐碱荒地为研究对象,采用台田-浅池土地利用新模式,同时在台田底部设计了4种脱盐工程处理,通过分析2年各底部排盐措施的排盐效果,得出结论:不同底部排盐措施处理下,经过两年种植后的台田土壤表层、耕层以及1m土体的脱盐情况以底部弧形覆膜+埋设排盐暗管排盐措施最为明显,1m土体脱盐率达35.6%;底部苇把+棉花秆覆盖处理也有较好脱盐效果,脱盐率为25.6%;底部弧形覆膜+耕层地秸秆覆盖处理1m土体脱盐率为20.4%;这3种处理具有相同脱盐特征,均为表层>1m土体>耕作层;底部铺设苇板处理和对照处理土壤盐分未降反增,且增加情况为耕层>1m土体>表层.初步证明修建台田时.台田底部采用弧形覆膜+埋设排盐暗管的排盐措施可有效加快台田土壤排盐速度,达到改良盐碱荒地土壤目的. |
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其他语种文摘
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The Bohai rim region has been traditional core areas of China's regional economic zones and major grain production zones but suffering from serious water resources stress. The shortage of freshwater resources and land resources over the areas has been major constraints for regional development. On the other hand, the Bohai rim region is rich in tidal beach resources, accounting for around 30% of that for the whole country. To this end, it has great potential to be exploited in the future. In this paper, the saline wastelands of Sino-Czech farm in Huanghua City in Hebei Province in critical periods of spring droughts were investigated in detail. The sea ice water was utilized for irrigation and different desalination processing projects were adopted at the bottom of the raised field with the objective to compare and contrast desalination effects under different treatment conditions. The experiment was based on a new land use model of the 'raised field-shallow pond' pattern and four kinds of desalination projects at the bottom of the raised field were designed. Through an analysis of two-year period of crop growth and the desalination effect of different treatments, results showed that after two years of cultivation based on different treatments at the bottom of fields, the desalination efficiency of the surface soil, the cultivated layer and the 1 m depth soil with the treatment of the arc-shaped row of salt-coated and laying underground pipe salt drainage measures were most obvious, showing a desalinization rate of 35.6% at 1 m depth soil. It was also found that the bottom treated by the reeds and cotton stalks coverage also showed a good desalination effect, indicating a desalination rate of 25.6%. The 1 m depth soil bottom of the arc-shaped membrane and straw mulch treatments exhibited a desalinization rate of 20.4% . In general, the three treatments have similar characteristics of desalination, i.e., they all show surface soil > 1m depth soil > cultivated layer. The soil bottom treated by the laying of reed plate processing, its soil salinity did not decrease but increase, showing an increasing range of the topsoil > 1 m depth soil > cultivated layer. It could be concluded that when constructing the raised field, the bottom treated with the row of curved coated and laying underground pipe emission measures would result in the acceleration of the rate of soil salt drainage, achieving the goal of improving the soil quality of saline-alkali wasteland. In this study, the engineered measures for saline-alkali wasteland were adopted and the scientific desalinization and the salt-resistance measures were as supplements combined with the usage of the sea ice water for irrigation during critical periods of crop growth in spring. We established a three-dimensional agricultural production system over the saline-alkali lands, and proposed a new model of integrating water and land resources development and utilization. This study would provide meaningful reference for addressing agricultural water shortages and increasing the value of the tidal saline-alkali soil as well as effectively increasing cultivated land areas over the Bohai Sea regions. |
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来源
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资源科学
,2010,32(3):436-441 【核心库】
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关键词
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台田
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排盐处理
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降盐效率
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滨海盐碱地
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环渤海地区
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地址
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1.
北京师范大学, 地表过程与资源生态国家重点实验室, 北京, 100875
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北京师范大学地理学与遥感科学学院, 北京, 100875
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1007-7588 |
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学科
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海洋学 |
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基金
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国家863计划
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文献收藏号
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CSCD:3867101
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