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Description: Willow cultivation, besides having a high potential in biomass production, has a deep root system that can be an alternative to improve the physical properties in cultivated organic soils that present problems of compaction and drainage. The objective of this experiment was to evaluate the evolution of the physical properties of an organic soil under the effect of willow cultivation. A plot divided into five hydraulically isolated sections was implemented, which were: TI-control (no-cultivation), SII-living roots (willow planted in edges in 2016), FLIII-dead roots (willow mowed and plowed in 2018), FIV- dead roots with right side of section not isolated and MV-no cultivation with left side of section not isolated to measure effects of cultivation in adjacent sections. Saturated hydraulic conductivity, matric potential and water table level (WT) measurements were performed in two summer seasons, as well as two lettuce crop rotations per summer to evaluate the yield in each section. SII was the treatment that kept the lowest WT. Treatments SII, FLIII, FIV, MV followed a similar pattern of WT variation, maintaining the lowest WT and allowing a faster rate of soil drainage than TI after a rain event. This study showed that willow roots have a positive effect on the improvement of soil physical properties and dead roots create bio-pores which improve water transport efficiency.

Keywords: Willow, roots, organic soil, water table level, drainage
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Date: 2021-06-11
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Conference name: 5th CIGR International Conference and CSBE-SCGAB AGM 2021, Quebec City,QC, 11-14 May 2021.
Session name: Soil and Water 2 - Soils Topics

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Publication type: Presentation
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Coverage: Canada
Language 1: en
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Rights: Canadian Society for Bioengineering
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