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- W2286765287 abstract "The regeneration of 13 blackwood swamp coupes treated between 1978 and 1992 was assessed for blackwood seedling density, stocking, early growth and form. Nine silvicultural treatments were applied during the period. They were clearfell, burn and fence; clearfell and burn with failed fence (within 12 months); clearfell only; selectively logged; selectively logged and poisoned; scrub-rolled and burnt; scrub-rolled and burnt with supplementary planting; scrubrolled and burnt in strips; and scrub-rolled, burnt and fenced. The scrub-roll treatments were applied in areas where there was insufficient blackwood to allow commercial harvesting. The 13 coupes were classed as younger coupes (7–12 years since treatment) or older coupes (13–21 years), with different regeneration assessment techniques used for each class. Blackwood seedling density varied widely among the treatments according to the success of browsing control. Fencing resulted in up to 7000 established blackwood seedlings per hectare for coupes up to 12 years old. Unfenced coupes at the same age ranged from less than 100 to 360 seedlings per hectare. Only successfully fenced treatments achieved preliminary stocking standards set at 65% of sample plots stocked with blackwood. This standard was equivalent to about 3000 seedlings/ha for coupes aged 7–12 years. Blackwood form appeared to be positively influenced by the presence of nurse species that included Melaleuca and Leptospermum spp., Acacia mucronata, A. verticillata and Cassinia aculeata. Both blackwood and nurse species grew between 0.5–0.7 m/yr in height for stands aged 7–12 years. Planted seedlings protected in mesh cages grew at similar rates to natural regeneration; 63% of plantings survived after 15 years. However, planting is expensive and not normally required for blackwood swamp regeneration. Scrub-rolling in 25 m strips retained more rainforest species and structural diversity than broadcast scrub-rolling. However, retained belts were damaged by burning and windthrow so that less than one-third of their original basal area remained 15 years after treatment." @default.
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- W2286765287 date "2000-01-01" @default.
- W2286765287 modified "2023-09-26" @default.
- W2286765287 title "Comparison of regeneration success of alternative silvicultural treatments in blackwood swamps." @default.
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