Skip to main content Accessibility help
×
Home

Vegetation Control and Soil Moisture Depletion Related to Herbicide Treatments on Forest Plantations in Northeastern Oregon

  • Elizabeth Cole (a1), Amanda Lindsay (a2), Michael Newton (a3) and John D. Bailey (a4)

Abstract

Reforestation in the Inland Northwest, including northeastern Oregon, USA, is often limited by a dry climate and soil moisture availability during the summer months. Reduction of competing vegetative cover in forest plantations is a common method for retaining available soil moisture. Several spring and summer site preparation (applied prior to planting) herbicide treatments were evaluated to determine their efficacy in reducing competing cover, thus retaining soil moisture, on three sites in northeastern Oregon. Results varied by site, year, and season of application. In general, sulfometuron (0.14 kg ai ha–1 alone and in various mixtures), imazapyr (0.42 ae kg ha–1), and hexazinone (1.68 kg ai ha–1) resulted in 3 to 17% cover of forbs and grasses in the first-year when applied in spring. Sulfometuron+glyphosate (2.2 kg ha–1) consistently reduced grasses and forbs for the first year when applied in summer, but forbs recovered in the second year on two of three sites. Aminopyralid (0.12 kg ae ha–1)+sulfometuron applied in summer also led to comparable control of forb cover. In the second year after treatment, forb cover in treated plots was similar to levels in nontreated plots, and some species of forbs had increased relative to nontreated plots. Imazapyr (0.21 and 0.42 kg ha–1) at either rate, spring or summer 2007, or at lower rate (0.14 kg ha–1) with glyphosate in summer, provided the best control of shrubs, of which snowberry was the dominant species. Total vegetative cover was similar across all treatments seven and eight years after application, and differences in vegetation were related to site rather than treatment. In the first year after treatment, rates of soil moisture depletion in the 0- to 23-cm depth were correlated with vegetative cover, particularly late season soil moisture, suggesting increased water availability for tree seedling growth.

Copyright

Corresponding author

*Author for correspondence: Liz Cole, Forest Engineering, Resources and Management, Oregon State University, Corvallis, OR 97331. (E-mail: liz.cole@oregonstate.edu)

References

Hide All
Aavik, T, Pussa, K, Roosaluste, E, Moora, M (2009) Vegetation change in boreonemoral forest during succession – trends in species composition, richness, and differentiation diversity. Annales Botanici Fennici 46:326335
Biring, B, Yearsley, HK, Hays-Byl, W (2000) Pinchi Lake operational herbicide monitoring: 10-year conifer and vegetation responses in the sbsdw3. Victoria BC, Canada: Ministry of Forests Research Program Extension Note 46. 6 p
Biring, BS, Comeau, PG, Fielder, P (2003) Long-term effects of vegetation control treatments for release of Engelmann spruce from a mixed-shrub community in southern British Columbia. Ann For Sci 60:681690
Biring, BS, Hays-Byl, WJ, Hoyles, SE (1999) Twelve-year conifer and vegetation responses to discing and glyphosate treatments on a BWBSmw backlog site. Victoria BC, Canada: Ministry of Forests Research Program, Working Paper 43. 34 p
Blake, PM, Hurst, GA, Terry, TA (1987) Responses of vegetation and deer forage following application of hexazinone. South J Appl For 11:176180
Cole, EC, Newton, M, White, DE (1986) Response of northwestern hardwoods, shrubs, and Douglas-fir to Arsenal® and Escort®. Pages 93–101 in Proceedings of the 39th Meeting Western Society of Weed Science. San Diego, CA: Western Society of Weed Science
Cole, EC, Newton, M, White, DE (1988) Efficacy of imazapyr and metsulfuron methyl for site preparation and conifer release in the Oregon Coast Range. Corvallis, OR: Oregon State University College of Forestry Forest Research Laboratory Research Note 81. 7 p
Dinger, EJ (2012) Characterizing Early-Seral Competitive Mechanisms Influencing Douglas-fir Seedling Growth, Vegetation Community Development, and Physiology of Selected Weedy Plant Species. Ph.D dissertation. Corvallis, OR: Oregon State University. 212 p
Dinger, EJ, Rose, R (2009) Integration of soil moisture, xylem water potential, and fall-spring herbicide treatments to achieve the maximum growth response in newly planted Douglas-fir seedlings. Can J For Res 39:14011414
Dinger, EJ, Rose, R (2010) Initial fall-spring vegetation management regimes improve moisture conditions and maximize third-year Douglas-fir seedling growth in a Pacific Northwest plantation. N Z J For Sci 40:93108
Duguid, MC, Ashton, MS (2013) A meta-analysis of the effect of forest management for timber on understory plant species diversity in temperate forests. For Ecol Manag 303:8190
Dyksterhuis, EL, High, CT (1985) Soil survey of Union County area, Oregon. US Department of Agriculture Soil Conservation Service, Oregon Agricultural Experiment Station
Emmingham, WH, Oester, PT, Fitzgerald, SA, Filip, GM, Edge, WD (2005) Ecology and management of eastern Oregon forests. Manual 12. Corvallis, OR: Oregon State University Extension Publication. 208 p
Ferguson, DE (1999) Effects of pocket gophers, bracken fern, and western coneflower on planted conifers in northern Idaho – an update and two more species. New For 18:199217
Freedman, B, Morash, R, MacKinnon, D (1993) Short-term changes in vegetation after the silvicultural spraying of glyphosate onto regenerating clearcuts in Nova Scotia, Canada. Can J For Res 23:23002311
Gardner, WH (1986) Water content. Pages 493544 in Klute A, ed. Methods of Soil Analysis: Part 1. Physical and Mineralogical Methods. Madison WI: Soil Science Society of America
Graham, RT, Jain, TB, Cannon, P (2005) Stand establishment and tending in the Inland Northwest Pages 47–78 in Harrington CA, Schoenholtz SH, tech eds. Productivity of Western Forests: A Forest Products Focus. Portland, OR: US Department of Agriculture Forest Service, Pacific Northwest Research Station. General Technical Report PNW-GTR-642
Hann, WJ, Jones, JL, Karl, MG, Hessburg, PF, Keane, RE, Long, DG, Menakis, JP, McNicoll, CH, Leonard, SG, Gravenmier, RA, Smith, BG (1997) Landscape dynamics of the basin. Pages 337–1057 in Quigley TM, Arbelbide SJ, tech eds. An assessment of ecosystem components in the interior Columbia basin and portions of the Klamath and Great Basins. Portland, OR: US Department of Agriculture Forest Service, Pacific Northwest Research Station General Technical Report PNW-GTR-405
Harper, GJ, Herring, LJ, Hays-Byl, WJ (1997) Conifer and vegetation response in the BWBSmw1 12 years after mechanical and herbicide site preparation. Victoria BC, Canada: Ministry of Forests Research Program Working Paper 29
Harrington, TB, Slesak, RA, Schoenholtz, SH (2013) Variation in logging debris cover influences competitor abundance, resource availability, and early growth of planted Douglas-fir. For Ecol Manage 296:4152
Harrington, TB, Tappeiner, JC II (1991) Competition affects shoot morphology, growth duration, and relative growth rates of Douglas-fir saplings. Can J For Res 21:474481
Hobbs, SD, Tesch, SD, Owston, PW, Stewart, RE, Tappeiner, JC II, Wells, GE, eds. (1992) Reforestation practices in southwestern Oregon and northern California. Corvallis, OR: Oregon State University. 465 p
Hytönen, J, Jylhä, P (2011) Long-term response of weed control intensity on Scots pine survival, growth, and nutrition on former arable land. Eur J For Res 130:9198
Johnson, CG Jr, Clausnitzer, RR (1991) Plant associations of the Blue and Ochoco Mountains. Portland, OR: US Department of Agriculture Forest Service R6-ERW-TP-036-92
Kelpsas, B, Landgren, C (2016) Forestry and hybrid cottonwoods. Pages K1K23 in Peachey E, ed. PNW Weed Management Handbook. Corvallis, OR: Oregon State University
Lindsay, A (2011) Seedling Response to Vegetation Management in Northeastern Oregon. MS thesis. Corvallis, OR: Oregon State University. 184 p
Newton, M (1973) Forest rehabilitation in North America: some simplifications. J For 71:159162
Newton, M, Cole, EC, Barry, JW (2009) “Waving wand” broadcast hand application of herbicides: technical basis and usage. Corvallis, OR: Oregon State University Contributions in Education and Outreach No. 2. 30 p
Newton, M, Preest, DS (1988) Growth and water relations of Douglas-fir (Pseudotsuga menziesii) seedlings under different weed control regimes. Weed Sci 36:653662
Oliver, WW (1990) Spacing and shrub competition influence 20-year development of planted ponderosa pine. West J Appl For 5:7982
PRISM Climate Group (2017) PRISM Climate Data, Northwest Alliance for Computational Science and Engineering. http://prism.oregonstate.edu. Accessed: March 17, 2017
Ristau, TE, Stoleson, SH, Horsley, SB, deCalesta, DS (2011) Ten-year response of the herbaceous layer to an operational herbicide-shelterwood treatment in a northern hardwood forest. For Ecol Manage 262:970979
Robertson, NA, Davis, AS (2012) Sulfometuron methyl influences seedling growth and leaf function of three conifer species. New For 43:185195
Rose, R, Ketchum, JS (2002) Interaction of vegetation control and fertilization on conifer species across the Pacific Northwest. Can J For Res 32:136152
Rose, R, Rosner, LS, Ketchum, JS (2006) Twelfth-year response of Douglas-fir to area of weed control and herbaceous versus woody weed control treatments. Can J For Res 36:24642473
Rosner, LS, Rose, R (2006) Synergistic stem volume response to combinations of vegetation control and seedling size in conifer plantations in Oregon. Can J For Res 36:930944
Sullivan, TP, Wagner, RG, Pitt, DG, Lautenschlager, RA, Chen, DG (1998) Changes in diversity of plant and small mammal communities after herbicide application in sub-boreal spruce forest. Can J For Res 28:168177
Thompson, DG, Pitt, DG (2003) A review of Canadian forest vegetation management research and practice. Ann For Sci 60:559572
Wagner, RG, Little, KM, Richardson, B, McNabb, K (2006) The role of vegetation management for enhancing productivity of the world’s forests. Forestry 79:5779
Wagner, RG, Robinson, AP (2006) Critical period of interspecific competition for four northern conifers: 10-year growth response and associated vegetation dynamics. Can J For Res 36:24742485
Walstad, JD, Kuch, PJ, eds. (1987) Vegetation management for conifer production. New York, NY: John Wiley. 523 p
Zutter, BR, Glover, GR, Gjerstad, DH (1986) Effects of herbaceous weed control using herbicides on a young loblolly pine plantation. For Sci 32:882899

Keywords

Related content

Powered by UNSILO

Vegetation Control and Soil Moisture Depletion Related to Herbicide Treatments on Forest Plantations in Northeastern Oregon

  • Elizabeth Cole (a1), Amanda Lindsay (a2), Michael Newton (a3) and John D. Bailey (a4)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed.