Morphological traits and root anchorage ability of native pioneer tree species for reforestation of mudstone badlands

Lee, Jung-Tai; Lin, Yu-Syuan; Shi, Chengying; Lee, Ming-Jen

doi:10.1080/13416979.2021.2021637

Cited by 1 publication

(1 citation statement)

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“…One-month-old seedlings of C. dactylon and E. ophiuroides, getting to a mean height of 3.2 ± 0.5 cm and 2.8 ± 0.3 cm, respectively, were transplanted to high wooden crates (35 cm × 35 cm × 30 cm, l × w× h, 1 plant per crate) and low wooden crates (35 cm ×35 cm × 20 cm, l × w × h, 40 plants per crate), packed with badland soils collected from the same area. The soils were packed utilizing rammer to duplicate the physical properties of mudstone soils [26]. For analyses of root configuration, root trait and root biomechanical characteristics, one seedling of each species was planted to 32 high wooden crates individually.…”

Section: Sample Preparationmentioning

confidence: 99%

Root Functional Traits and Water Erosion-Reducing Potential of Two Indigenous C4 Grass Species for Erosion Control of Mudstone Badlands in Taiwan

Lee¹,

Lin²,

Shih³

et al. 2022

Water

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In southern Taiwan, mudstone badland accounts for over 1000 km2 of the upstream region of watersheds. Rainstorms often induce interrill and surface erosion on the mudstone slopes. Furthermore, the large quantity of soils detached by surface runoff result in severe sedimentation in reservoirs. Thus, soil erosion control of mudstone badlands represents one of the most pressing problems in reservoir watershed management. Cynodon dactylon (L.) Pers. (Bermuda grass) and Eremochloa ophiuroides (Munro) Hack. (Centipedegrass) are two native predominant C4 grass species appearing on mudstone badlands. They play a key role in erosion control and the revegetation of mudstone slopes. Nevertheless, their root functional traits and water erosion-reducing potential have not been investigated. In this study, the root traits were examined. Vertical pullout and tensile tests were conducted to measure root pullout resistance and root tensile strength. Hydraulic flume tests were also performed to evaluate their water erosion-reducing potentials. The results demonstrated that the root systems of C. dactylon and E. ophiuroides grasses all belonged to the fibrous M-type. C. dactylon had remarkably better root traits compared to those of E. ophiuroides. Furthermore, the root tensile resistance of C. dactylon was remarkably higher than that of E. ophiuroides. In addition, hydraulic flume tests showed that C. dactylon has remarkably smaller soil detachment rates than that of E. ophiuroides. Altogether, our data clearly show that C. dactylon has better root traits, root pullout resistance, root tensile resistance and water erosion-reducing potential than E. ophiuroides and is more suitable for erosion control of mudstone badland. Further studies on large-scale implementation techniques of these species for efficient vegetation restoration are needed.

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Section: Sample Preparationmentioning

confidence: 99%