Reinforcement losses in soil stabilisation due to decomposing roots of Chrysopogon zizanioides and Chrysopogon nemoralis
Bibliographic Data
Quantifying evolutions of the biomechanical properties and mechanical root reinforcement to soil with the duration of root decomposition is important to land management strategy and to soil stabilisation purposes. However, the variations of these properties of the roots of herbaceous species, especially following herbicide application in agriculture practices, have rarely been studied. This study aims to measure the effects of root decomposition due to herbicide on the root biomechanical properties and root reinforcement provided by two contrasting vetiver species ( Chrysopogon nemoralis and Chrysopogon zizanioides ). We applied herbicide (i.e., propanil) to four treatments of each species, considering four different durations of decomposition (7‐, 28‐, 56‐ and 112‐days since herbicide application). The biomechanical properties were measured by uniaxial tensile tests, whereas the root reinforcement to poorly graded sand (SP) was quantified by direct shear tests. Root decomposition significantly reduced mean root tensile strength, secant modulus and breakage strain of C. nemoralis and C. zizaniodes roots after 112 days since the herbicide application. Significant negative power correlations between root diameter and root strength (or root secant modulus) ( R 2 = 0.39–0.86; p ‐value C. nemoralis displayed greater and quicker loss of both the root biomechanical properties and root reinforcement to soil than C. zizanioides
Biology · Botany · Composite material · Decomposition · Reinforcement · Ultimate tensile strength · Chemistry · Materials Science · Soil Management and Crop Yield · Soil Mechanics and Vehicle Dynamics · Tree Root and Stability Studies · Ecology · Horticulture
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| Unique citing works | 3 |
|---|---|
| Citations per year | 1.5 |
| Citation span | 2024 - 2026 (3) |
| Citation velocity | current |
| Highly cited | No |
| Citation types | Neutral: 3 |