施用生物炭和聚丙烯酰胺对海涂围垦区盐碱土水力性质的影响

doi:10.13287/j.1001-9332.201711.014

应用生态学报 ›› 2017, Vol. 28 ›› Issue (11): 3684-3690.doi: 10.13287/j.1001-9332.201711.014

施用生物炭和聚丙烯酰胺对海涂围垦区盐碱土水力性质的影响

曹雨桐¹, 佘冬立^1,2*

1 河海大学南方地区高效灌排与农业水土环境教育部重点实验室, 南京 210098
2 河海大学水利水电学院, 南京 210098

出版日期:2017-11-18 发布日期:2017-11-18
通讯作者: *mail:shedongli@hhu.edu.cn
作者简介:曹雨桐, 女, 1993年生, 硕士研究生.主要从事农业水土资源保护研究.E-mail:571006733@qq.com
基金资助:
本文由国家自然科学基金项目(41471180,51679062)、江苏省国土资源科技项目(KJXM2017032)和江苏高校优势学科建设工程项目(PAPD)资助

Effects of biochar and PAM application on saline soil hydraulic properties of coastal reclamation region

CAO Yu-tong¹, SHE Dong-li^1,2*

1 Ministry of Education Key Laboratory of Efficient Irrigation-Drainage and Agricultural Soil-Water Environment in Southern China, Hohai University, Nanjing 210098, China
2 College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China

Online:2017-11-18 Published:2017-11-18
Contact: *mail:shedongli@hhu.edu.cn
Supported by:
This work was supported by the National Natural Science Foundation of China (41471180, 51679062), the Land and Resources Science and Technology Project of Jiangsu Province (KJXM2017032) and the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)

摘要/Abstract

摘要： 通过圆盘入渗试验,探讨不同改良剂施用量下土壤入渗特性的变化,揭示添加生物炭和聚丙烯酰胺(PAM)对海涂围垦区盐碱土水力学参数、孔隙特征及不同级别孔隙水流贡献率的影响.结果表明: 单施2%生物炭,土壤饱和导水率比对照增加46.4%;盐碱土饱和导水率随PAM施用量增加而减小.单施2%生物炭使土壤总有效孔隙度和半径>100 μm的有效孔隙度分别增加8.3%和10.2%.单施PAM时,土壤总有效孔隙度和不同半径孔隙有效孔隙度均有减小趋势,其中,PAM梯度为1‰时最明显,减幅高达88%以上.施用生物炭和PAM后,半径<100 μm的孔隙的水流贡献率呈下滑趋势,半径>500 μm的孔隙对土壤水流运动起主导作用.

Abstract: Disc infiltration tests were carried out to study the soil infiltration characteristics under different rates of soil amendments application, and to investigate the effects of biochar and polyacrylamide (PAM) application on saline soil hydraulic properties, pore characteristics and contribution of each pore to soil water flow in coastal reclamation region. The results showed that soil satura-ted hydraulic conductivity increased by 46.4% when biochar was applied at 2% compared with the control, and decreased with increasing PAM application. The total effective soil porosity and r>100 μm pores were increased by 8.3% and 10.2% (P<0.05) with the application of 2% biochar alone. The total effective soil porosity and different radius pores decreased with the PAM application. Particularly, the total effective soil porosity decreased markedly when PAM was applied at 1‰ and the reduction was up to 88%. With the application of biochar and PAM, the contribution of r<100 μm pores to water flow decreased and the pores with r>500 μm played a major role in determining water flows.

曹雨桐, 佘冬立. 施用生物炭和聚丙烯酰胺对海涂围垦区盐碱土水力性质的影响[J]. 应用生态学报, 2017, 28(11): 3684-3690.

CAO Yu-tong, SHE Dong-li. Effects of biochar and PAM application on saline soil hydraulic properties of coastal reclamation region[J]. Chinese Journal of Applied Ecology, 2017, 28(11): 3684-3690.

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施用生物炭和聚丙烯酰胺对海涂围垦区盐碱土水力性质的影响

Effects of biochar and PAM application on saline soil hydraulic properties of coastal reclamation region

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