• Browse Quality Response to Forest Fertilization and Soils in Florida

      Wood, J. M.; Tanner, G. W. (Society for Range Management, 1985-09-01)
      Spring leaves of red maple (Acer rubrum) and inkberry (Ilex glabra) from slash pine (Pinus elliottii) plantations fertilized with diammonium phosphate 4 to 9 years prior to collection were higher in phosphorus (P) than leaves from an unfertilized plantation. The nitrogen (N) content of inkberry leaves also was higher in spring. During the summer, in vitro organic matter digestibility (IVOMD) was higher in both species and P was higher in inkberry on fertilized plantations. However, any residual effect of fertilization on nutrient concentrations was overshadowed by a decrease in P and N and an increase in calcium (Ca) in the summer. The effect of soil series on nutrient values was negligible, with the exception of Ca, which was higher on a somewhat poorly drained Dunbar soil series than on a poorly drained Bladen soil series. Nutritive value of both browse plants was limited by low IVOMD and P concentrations, which never attained maintenance levels required by white-tailed deer (Odocoileus virginianus).
    • Mechanical shrub control on flatwoods range in south Florida

      Tanner, G. W.; Wood, J. M.; Kalmbacher, R. S.; Martin, F. G. (Society for Range Management, 1988-05-01)
      Relative plant abundance, canopy cover, and aerial biomass of shrubs on a poor condition, flatwoods range in south Florida were measured before, 1, and 3 yr after a single pass of a roller chopper or web plow when soils were dry (May 1981) and when soils were saturated (September 1981). Aerial biomass of herbaceous species was measured at the post-treatment sample dates. Abundance of saw-palmetto (Serenoa repens (Bartr.) Small) plants, the dominant shrub, was reduced 70% by web plowing compared to 25% by roller chopping. Reduction of saw-palmetto canopy cover and aerial biomass also were greater on web-plowed than on roller-chopped plots. Runner oak (Quercus minima (Sarg.) Small) was the only other shrub which had more than 5% canopy cover before treatment. Both types of mechanical treatments controlled runner oak by approximately 50%. However, responses of runner oak abundance, canopy cover, and aerial biomass were not significantly different between roller chop and web plow treatments.