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GENERAL48962
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Last modified
8/24/2016 8:26:45 PM
Creation date
11/23/2007 4:45:31 PM
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Template:
DRMS Permit Index
Permit No
C1982057
IBM Index Class Name
General Documents
Doc Date
3/24/2006
Doc Name
RMRS NTTT Aspen Study Proposal
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DMG
Permit Index Doc Type
General Correspondence
Media Type
D
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No
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beds enable the transplants to thrive. Although aspen is somewhat tolerant of drought <br />conditions (Lieffers et al. 2001), irrigation could bE:nefit growth and survival of planted <br />aspen stock, because moisture stress negatively affects aspen response to nutrient <br />uptake (van den Driessche et al. 2003). Water deficit stress also reduces stomata) <br />conductance, root hydraulic conductivity, and shoot leaf water potential in aspen <br />(Siemens and Zwiazek 2003). Irrigation has been shown to increase growth of hybrid <br />poplar, a closely related species (Hansen 1988; :strong and Hansen 1991). <br />Therefore, it seems reasonable to conclude that supplemental irrigation of <br />aspen planted on reclaimed surface-mined lands could increase initial survival and <br />allow trees to grow sufficient root systems to ultimately survive without additional <br />water and establish new self-regenerating clones on mined lands. Testing his <br />hypothesis, gaining additional knowledge about different planting methods, and <br />documenting factors that potentially limit the re-e:~tablishment of aspen is crucial to re- <br />establishing aspen on surface-mined lands in the arid west. <br />Preliminary Studies: <br />A pilot study was funded by Seneca Coal Company in 2004 to examine the <br />feasibility of using supplemental drip irrigation to establish aspen on reclaimed coal <br />mine overburden soils. Overburden soils are normally stored for a number of years <br />before landscape resurfacing and planting. The sl:udy established on re-claimed lands <br />owned by Seneca near Hayden, Colorado examined growth, survival, and water <br />status during the 2005 growing season of aspen trees planted on reclaimed soils <br />during the fall of 2004. <br />The objective of this study initially was to examine the survival, growth, and <br />water status of irrigated aspen transplants on two types of topsoil, placed over coal <br />mine overburden material that had been replaced after surface mining. However, <br />circumstances allowed us to expand the original study design to collect growth and <br />survival data from: 1) aspen sprouts transplanted from a nearby mine, placed in the <br />two topsoils within a fenced area and drip irrigateni at three watering levels with an un- <br />watered control; 2) un-watered sprouts arising from aspen root segments that had <br />been transported into the fenced area in the two topsoils; 3) commercially grown <br />potted aspen seedlings that were planted in a nearby fenced area, and; 4) natural <br />aspen sprouts growing in an un-mined area in the vicinity that was not fenced and <br />subject to grazing effects of ungulates on growth ,and survival of aspen sprouts. <br />Design and Methods -The initial project was, a case study of the effectiveness of <br />irrigation treatment on the survival, growth, and water status of aspen cuttings planted <br />on a site of reclaimed land of the Seneca Coal Company II-W mine south of Hayden, <br />Colorado. The irrigated portion of the study was designed to measure the effect of <br />supplemental irrigation on aspen saplings that had been transplanted from a naturally <br />regenerating site on the nearby (<3 km) Yoast mine where the original forest had been <br />cleared in preparation for mining. Aspen saplings between 1-2 m in height were <br />selected from this site at the end of the growing season in 2004 and pruned to leave <br />only the uppermost branches intact. In October, 2004, these saplings were dug using <br />a small backhoe and immediately transplanted into augered holes that had been <br />prepared at the fenced planting site at the II-W mine. All cuttings were presumed to be <br />from the same genetic clone since they were collected from the same area. Trees <br />were planted in eight blocks consisting of five rows of ten trees, (50 trees total) spaced <br />
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