经过5 a的试验，通过采用控制中沟的深度不深入木质部，割面负荷率不超过60%，每年的下降幅度不超过12 cm，每年起割时在距上年最后一次割沟处设置1～2愈合带的方法，可使每年采脂产生的割面在2 a的时间内完全愈合，以增强采脂树的抗折断力及消除割面因无树皮保护而造成的腐朽现象并提高采脂树的养分输送能力，进而提高树木的产脂量。%Through the test of 5 a, by using the control channel depth deeply in xylem of Pinus elliottii, load rate of cutting surface is less than 60%, the annual decline rate is less than 12 cm, 1 ~2 healing belt were set in the last cut channel from when the year cutting for every year, it can make the annual cutting surface complete healing in 2 a, in order to enhance the anti breaking force of mining trees and eliminate corrupt phenomenon face because of no bark protection and improve the nutrient transport capacity, and then improve the resin yield of P. elliottii trees.
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