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The relation of preferential flow pathways to phosphorus leaching from typical plastic shed vegetable production soils of China
Agriculture, Ecosystems & Environment ( IF 6.0 ) Pub Date : 2021-02-01 , DOI: 10.1016/j.agee.2020.107218 Yusef Kianpoor Kalkhajeh , Biao Huang , Wenyou Hu
Agriculture, Ecosystems & Environment ( IF 6.0 ) Pub Date : 2021-02-01 , DOI: 10.1016/j.agee.2020.107218 Yusef Kianpoor Kalkhajeh , Biao Huang , Wenyou Hu
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Abstract Despite its importance, the contribution of preferential flow pathways (PFPs) to subsurface phosphorus (P) leaching from heavily-fertilized plastic shed vegetable production (PSVP) soils in China has remained unexplored. To investigate this, five acid fine-textured Orthic Anthrosols and six alkaline coarse-textured Ustic Cambosols intact soil columns (20 cm depth and 15 cm diameter), from two typical PSVP systems in Jiangsu Province, Southeast China, were subjected to six leaching experiments with collection of effluents over 24 h. Leachate samples were analyzed for their concentrations of particulate P (PP) and dissolved reactive P (DRP). Finally, soil columns were photographed for their 2D distribution of PFPs both vertically (0−20 cm) and horizontally at 5 cm intervals after the application of dye tracer (Brilliant Blue). Overall, alkaline coarse-textured Ustic Cambosols with longer history of PSVP had larger PFPs’ volumes than acid fine-textured Orthic Anthrosols with vertical (0−20 cm) values ranging from 812 to 1260 cm2 and 623 to 1104 cm2, respectively. Of soil properties, pH and sand content had significant positive correlations with PFPs’ density (p
更新日期：2021-02-01
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