Signatur:
ZSP-201-81/18
In:
CRREL Report, 81-18
Beschreibung / Inhaltsverzeichnis:
During the growing seasons of 1977, 1978, and 1979, revegetation techniques were studied on the Chena River Lakes Project, a flood control dam and levee near Fairbanks, Alaska, to find an optimal treatment for establishing permanent vegetation cover on the gravel structures. The treatments tested on plots at the dam andor levee involved three main variables 1 vegetation grass and clover seed andor willow cuttings, 2 mulch, mulch blanket, andor sludge, and 3 substrate gravel or fine-grained soil over the gravel base. The mulches were hay, wood-cellulose-fiber, peat moss, and Conwed Hydro Mulch 2000, which is a wood-cellulose-fiber mulch with a polysaccharide tackifier. A constant rate of fertilizer was applied to all plots except the control. A section of each plot was refertilized again in their third growing season to compare annual and biannual fertilization. The high fertilization rate produced above-average growth. Fescue, brome, and foxtail were the most productive species on the dam, while alsike cover was the most productive on the wetter levee site. When grass seed and willow cuttings were planted at the same time, willow survival and growth were reduced. Fertilization is required for at least two years to produce an acceptable permanent vegetation cover, although fine- grained soil or sludge reduces the amount of fertilizer needed in the second year. Third-year fertilization may not be necessary since the benefits of the second fertilization continue for at least two years. A sludge treatment refertilized during its second growing season produces the highest biomass recorded in this study.
Materialart:
Schriftenreihen ausleihbar
Seiten:
ix, 59 Seiten
,
Illustrationen
Serie:
CRREL Report 81-18
URL:
https://hdl.handle.net/11681/9427
Sprache:
Englisch
Anmerkung:
CONTENTS
Abstract
Preface
Abbreviations
Conversion factors
Summary
Introduction
Background
Site characterization
Climate
Purpose
Materials and methods
General
Moose Creek Dam site
Tanana Levee site
Sampling and measurement
Abiotic controls on vegetation
Meteorological data
Soil moisture as a limiting factor
Soil chemical analysis
Vegetation growth and survival
Moose Creek Dam site
Tanana Levee site
Biomass by species
Roof penetration
Seedling density of invading woody species
Weeds
Supplemental observations
Sediment loss
Sludge and runoff-water composition
Cost analysis
Conclusions
Literature cited
Appendix A: 1977 grass growth on 1977 dam treatments
Appendix B: 1978 grass growth on 1977 dam treatments
Appendix C: 1979 grass growth on 1977 dam treatments
Appendix D: Grass growth on 1978 dam treatments
Appendix E: 1977, 1978, and 1979 survival of willow treatments
Appendix F: Grass growth on Tanana levee treatments
Appendix C: Chemical analysis of sludge and runoff water
Standort:
AWI Archiv
Zweigbibliothek:
AWI Bibliothek
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