关键词: 传播, 传播

Abstract: In this paper, the effect of five artificial update measures of the third generation of Robinia pseudoacacia after clear cutting were studied, including semicircle furrow, stump barking, stump hacked, stump excavated out and the control. The quantity, growth, biomass and cost of production were compared. It showed that many saplings sprouts were produced by the 5 measures, 6.7-8.5 plants on every stump, the effect of regeneration was good. The quantity of suckers was the maximum by stump excavated out, 7.8 plants on every stumps, 160%-270% higher than other measures. But there were 2.1-3.0 suckers by the other four measures, which could satisfy the need of forest regeneration. There were 3.8-6.0 sprouts on every stump by measures of semicircle furrow, stump barking, stump hacked and the control, the sprouts grew well and with high biomass, and could be used by Robinia pseudoacacia for short period. The regeneration effect and cost of production were comprehensively considered, stump excavated out was the best measure for regeneration of Robinia pseudoacacia forest, semicircle furrow, stump barking and stump hacked were inappropriate, the measure of the control was better if forest tending was carried out in time.