RESTORATION OF DOWNY BROME INFESTED RANGELANDS WITH GLYPHOSATE AND TRANSPLANTING WYOMING BIG SAGEBRUSH TO INCREASE SEED SOURCE DIVERSITY
Range and Meadow Forage Management Research
2009 Annual Report
1a.Objectives (from AD-416)
To develop and implement a comprehensive, regional Ecologically-Based Invasive Plant Management (EBIPM) program to restore ecosystems threatened and dominated by cheatgrass/medusahead in Rock Creek watershed and the Great Basin.
1b.Approach (from AD-416)
University of Nevada, Reno (UN-Reno) and USDA, Agricultural Research Service (ARS) scientists will cooperate on a project to (1) demonstrate and assess, on a large-scale, the effectiveness of reduced rates of glyphosate for control of downy brome, and to determine its utility in stimulating a trajectory toward desired species, and (2) determine the influence of (a) site, (b) reduction of herbaceous competition, (c) season of planting and (d) plant source (nursery stock vs. indigenous) on survival of sagebrush transplants (refer to project proposal for more detailed information). Documents SCA with UN-Reno.
Sagebrush wildlings were harvested during periods of high soil moisture. For survival rate comparison to more standard methodology, sagebrush bareroot stock or containerized seedlings were also purchased from a nursery. Study sites were established at each of 3 locations: (1) a cheatgrass monoculture, (2) a monoculture crested wheatgrass seeding, and (3) a native post-fire grass-forb community. At each site, treatments were arranged in a randomized block design with 5 replications. A spring-applied treatment of glyphosate (66 oz/ac) was used to reduce herbaceous cover. ADODR monitored progress through meetings and telephone calls.