A Root Density Tradeoff in an Okra-Assisted Subsurface Pipe Drainage System for Amelioration of Saline Soil

Agronomy

Lipu Han¹  Kai Guo¹  Jin Xie¹  Jintong Liu¹  Dong Fang¹  Shichao Wang¹  Asif Ameen² 

[1] Key Laboratory of Agricultural Water Resources, Hebei Key Laboratory of Soil Ecology, CAS Engineering Laboratory for Efficient Utilization of Saline Resources, Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang 050022, China;Rice Programme, Pakistan Agricultural Research Council, Kala Shah Kaku, Lahore 39020, Pakistan;

关键词: saline soil;    deep-rooted crop;    water soluble salts;    salt leaching;    desalination rate;    sodium adsorption ratio;   

DOI  :  10.3390/agronomy12040866

来源: DOAJ

【 摘 要 】

Subsurface pipe drainage technology can effectively improve coastal saline land in Northern China. We explored an okra (Abelmoschus esculentus L.)-assisted subsurface pipe drainage system to improve the water and salt discharge performance and benefits. In this study, the simulation box experiment was conducted to research the response of water and salt discharge performance in subsurface pipe drainage to okra root weight density (RWD). The drain outflow, soil salinity, and sodium adsorption ratio were determined. The results showed that okra RWD affected the vertical distribution of okra roots. Okra with an appropriate RWD (about 116 μg·cm⁻³) could significantly increase the cumulative drain outflow. Okra with an appropriate RWD (about 136 μg·cm⁻³) could significantly increase the desalting effect. Moreover, the RWD of okra also influenced the ability of subsurface pipe drainage to inhibit soil alkalization. The above results show that planting okra and installing subsurface pipe drainage to control drainage at the coastal saline land in Northern China can effectively improve the water and salt drainage effect when okra RWD is about 116–136 μg·cm⁻³. When using subsurface pipe drainage to improve coastal saline soils, planting okra with proper density may be an appropriate choice to improve the effect and benefit.

【 授权许可】

Unknown