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中国农学通报

中国农学通报 ›› 2015, Vol. 31 ›› Issue (7): 201-205.doi: 10.11924/j.issn.1000-6850.casb14100062

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

聚丙烯酰胺对天津滨海吹填土导水性能的影响研究

赵秀芳1,3,李娅莉2,赖羽寒1,李 鹏2,王振宇1,3,何亚锟1,3   

  1. (1天津泰达盐碱地绿化研究中心有限公司,天津 300457；2天津市南港工业区开发有限公司,天津 300280；3天津泰达绿化集团有限公司,天津 300457)
  • 收稿日期:2014-10-20 修回日期:2014-11-06 接受日期:2014-11-27 出版日期:2015-04-03 发布日期:2015-04-03
  • 通讯作者: 赵秀芳
  • 基金资助:
    天津市滨海新区“十大战役”重大科技支撑项目“滨海旅游区盐土和吹填土绿化关键技术集成与示范”(2010-Bk140003)；天津市建交委科技项目“南港工业区围海吹填土原土改良绿化技术研究与示范应用”(NG-CW-QT-11-0010)；天津市自然科学基金青年项目“吹填陆域原土改良绿地生态系统盐渍胁迫机理与防控技术”(13JCQNJC08100)。

Effects of PAM Application on the Hydraulic Conductivity of Dredger Fill in Tianjin Coastal Area

Zhao Xiufang1,3, Li Yali2, Lai Yuhan1, Li Peng2, Wang Zhengyu1,3,He Yakun1,3   

  1. (1Tianjin TEDA Saline Green Research Center Co., Ltd., Tianjin 300457;2Tianjin Nangang Industrial Zone Development Limited Company, Tianjin 300280;3Tianjin TEDA Green Group Co., Ltd., Tianjin 300457)
  • Received:2014-10-20 Revised:2014-11-06 Accepted:2014-11-27 Online:2015-04-03 Published:2015-04-03

摘要： 为改善滨海吹填土的导水性能，加速吹填土的淋洗排盐，通过室内土柱试验，研究了不同浓度聚丙烯酰胺(PAM)溶液施用对滨海吹填土入渗性能和淋盐能力的影响，结果表明：与对照处理相比，0.05、0.2、0.3、0.6、1.2、2.4 g/L PAM溶液施用均能有效改善滨海吹填土土壤结构，显著提升吹填土导水性能和淋洗脱盐能力，降低吹填土pH，增加土壤水分含量。淋洗初期，PAM施用浓度越高，吹填土入渗速率越大，随时间的延长，入渗速率降低；出水稳定后，0.6 g/L PAM处理入渗速率最大，达0.059 cm/h，为对照的1.64倍；淋洗267 h后，施用PAM处理土壤含盐量均低于1.0 g/kg，为非盐渍土，0.6 g/L处理最低，仅为0.32 g/kg，而对照处理含盐量为4.82 g/kg，属于重度盐渍土。可得出结论对于天津滨海吹填土，300万分子量的阴离子型PAM最佳施用浓度为0.6 g/L。

关键词: 阿勒泰地区, 阿勒泰地区, 参考作物潜在腾发量, FAO56 penman-monteith, FAO17 Penman, Irmark-Allen拟合

Abstract: An indoor soilcolumn experiment was carried out to study the effects of PAM application of different concentrations on the soil infiltration and salt leaching of the coastal dredger fill, in order to improve the hydraulic conductivity and accelerate the salt leaching of the coastal dredger fill. The results showed that the application of 0.05, 0.2, 0.3, 0.6, 1.2, 2.4 g/L PAM solution effectively improved the soil structure, significantly enhanced the capacity of hydraulic fill hydraulic conductivity and leaching desalination, reduced the value of pH and improved the soil moisture content for dredger fill. In the initial leaching, the higher the concentration of PAM solution was, the faster the infiltration rate of soil water was. The infiltration rate of soil water in the dredger fill decreased with time. After the water stability, the infiltration rate of the 0.6 g/L PAM treatment reached a maximum of 0.059 cm/h, which was 1.64 times of the control treatment. Soil salt contents of all the PAM applied treatments were less than 1.0 g/kg after 267 h continuous leaching, and all soils were non-saline soil. The soil salt content of the 0.6 g/L PAM applied treatment with 0.32 g/kg was the lowest, while the soil salt content of control treatment with 4.82 g/kg was in severe saline soil. The optimal application concentration for the anionic PAM with a molecular weight of three millions was 0.6 g/L to dredger fill in Tianjin coastal Area.