Laserfiche WebLink
ABSTRACT <br />Seeding, mature shrub transplanting and seedling transplants <br />appear to be feasible methods of establishing shrubs common to the <br />mountain shrub vegetation type. Oak, chokecherry, serviceberry, and <br />snowberry all did very well in the mature shrub transplants. All of <br />the various stocks used in the seedling transplant study had moderate <br />to high survival percentages. Adequate stands of serviceberry, <br />bitterbrush, and rose were obtained in seeding trials while snowberry, <br />chokecherry and oak did poorly when seeded. Even though the shrub <br />establishment studies had very promising results during the 1975-1976 <br />revegetation studies, information on survival and growth in 1977 and <br />1978 will be needed to draw conclusions about these establishment <br />methods. <br />Information gained from the individual species seedings, the <br />species combinations, the shrub seeding management practices, and the <br />runoff plot treatments indicated that stands of both serviceberry and <br />bitterbrush could be obtained when seeded in a mix with herbaceous <br />cover species; however, competition from seeded herbaceous species <br />drastically limited seeded shrub establishment. Mulching with 2 T/A <br />alfalfa enhanced seeded shrub establishment considerably; firming <br />the seedbed both before and after seeding with a lawn roller also <br />enhanced the establishment of seeded shrubs. The seeded shrubs did <br />not respond to nitrogen fertilization. <br />Nitrogen and/or phosphorus fertilization did not enhance cover <br />establishment on the Colowyo revegetation test plot. which has deep <br />dark soils. However, mulching with 2 T/A alfalfa did increase the <br />development of seeded herbaceous cover species. From the individual <br />species seedings, it is apparent that there area number of both <br />grass and forb species that are adapted to the Colowvo site. <br />The presence of a seeded herbaceous cover had a marked influence <br />on sediment yield. For a summer thunderstorm that dropped only 11.5 mm <br />of precipitation sediment yield varied from virtually zero on mulched <br />plots with good vegetative cover to almost 4 T/A on a 4:1 slope plot <br />that was not mulched and seeded only to shrubs. <br />Water yields for 1976 spring runoff were higher than exp cted. <br />The greatest amount of runoff was 1683 gallons from a 803 ft.~ plot <br />or 3.2 inches of runoff; the lowest value was 674 gallons or 1.4 inches <br />from the same size plot. The magnitude of these values is extremely <br />important when considering the quantity of water that could came from <br />' a recontoured surface. <br />- ii <br /> <br />