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Permanent link (DOI): https://doi.org/10.7939/R33T9DF46

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EFFECTS OF MICRO SITES AND AMENDMENTS ON NEAR SURFACE SOIL TEMPERATURE AND VOLUMETRIC WATER CONTENT TO ENHANCE REVEGETATION Open Access

Descriptions

Other title
Subject/Keyword
Amended Micro Sites
Soil Water, Temperature
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Jiao, Zhichao
Supervisor and department
Naeth, M. Anne (Renewable Resources)
Examining committee member and department
Naeth, M. Anne (Renewable Resources)
Ramirez, Guillermo Hernandez (Renewable Resources)
Chanasyk, David (Renewable Resources)
Shotyk, Willian (Renewable Resources)
Department
Department of Renewable Resources
Specialization
Land Reclamation and Remediation
Date accepted
2015-04-17T14:54:41Z
Graduation date
2015-11
Degree
Master of Science
Degree level
Master's
Abstract
Land reclamation requires successful germination, emergence and establishment of desired plant species. Seed and micro sites, often lacking in disturbed ecosystems, can be limiting factors for germination and plant establishment. Micro sites, or safe sites, are required to reduce or prevent soil and seed desiccation, especially in exposed soils common on early reclamation sites. Micro sites can provide heterogeneous conditions to favour germination and survival for a variety of native plant species. Even small changes in near surface soil temperature and water content can influence seed germination and plant establishment. Micro sites (mounds, pits, flat areas) were evaluated with addition of amendments (hydrogel, manure, blanket, straw, grass, control) to determine their effects on near surface soil temperature and volumetric water content. Near surface soil temperature and near surface soil water content were recorded with half an hour frequency to quantify the modification from micro sites and amendments. Research sites were established in Alberta, Canada, two in parkland and one in grassland. Near surface soil temperature and volumetric water content were modified with greater heterogeneity provided by micro sites and amendments relative to flat areas. Mounds consistently lowered near surface soil temperature in winter while raising near surface soil temperature in other seasons. The opposite occurred in pits. The amendments provided greater heterogeneity and thus higher variability in near surface soil temperature. Mulch treatments lowered near surface soil temperature. Both micro sites and amendments were associated with higher heterogeneity and variability in soil volumetric water content. Pits had higher near surface soil water contents than mounds. Micro sites and amendments modified soil conditions with more availability of favourable sites for native plant species in land reclamation.
Language
English
DOI
doi:10.7939/R33T9DF46
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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