Research note: A rock mulch layer supported little vegetation in an arid reclamation setting

Research output: Contribution to journalArticle

Abstract

Adding a surface rock layer (also called rock armor or rock mulch) to constructed slopes improves erosion resistance but has had mixed effects on revegetation. This study investigated the effects of rock layer depth (no rocks, 10-, 15-, and 20-cm rock layers) and rock size (5–20 cm diameter rocks) on vegetation cover. Seeding was applied four times in the first 2 years. After 3 years, plots with a rock layer averaged 7% vegetative cover compared to 85% on plots without a rock layer. There was a nonsignificant trend toward less vegetation with a deeper rock layer.

Original languageEnglish (US)
Pages (from-to)1-4
Number of pages4
JournalArid Land Research and Management
DOIs
StateAccepted/In press - Nov 7 2017

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mulch
rocks
vegetation
rock
rock armor
revegetation
seeding
land restoration
vegetation cover
sowing
erosion

Keywords

  • Constructed slopes
  • rock armor
  • rock depth
  • Sonoran desert

ASJC Scopus subject areas

  • Soil Science

Cite this

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abstract = "Adding a surface rock layer (also called rock armor or rock mulch) to constructed slopes improves erosion resistance but has had mixed effects on revegetation. This study investigated the effects of rock layer depth (no rocks, 10-, 15-, and 20-cm rock layers) and rock size (5–20 cm diameter rocks) on vegetation cover. Seeding was applied four times in the first 2 years. After 3 years, plots with a rock layer averaged 7{\%} vegetative cover compared to 85{\%} on plots without a rock layer. There was a nonsignificant trend toward less vegetation with a deeper rock layer.",
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