The Influence of Weeding on Growth of Browsed Seedlings in Douglas-Fir Plantations

摘要

Large Douglas-fir (Pseudotsuga menziesii) transplants were exposed to heavy browsing pressure under various weeding regimes in two experiments continued 4 and 5 yr, respectively. Browsing had relatively little effect on seedlings that did not receive weed control because potential growth was modest. With increasing degrees of weed control, seedlings that escaped browsing grew more rapidly.