截干对红松人工幼龄林侧枝生长的影响

以红松人工幼龄林(10年生)为研究对象,开展不同截干处理的结果表明,红松截干(按比例、轮枝)对侧枝生长影响显著。1/3截干轮枝基径、轮枝长平均值最大值(11.08、1.022)分别比对照高出140.87%、354.22%;三轮截干轮枝基径、轮枝长平均值最大值(8.11、0.51)比对照高出298.52%、211%。1/3截干平均值(11.08、1.022)比三轮平均值(8.11、0.51)要大,1/3截干最好。

Effect of Pruning of the Grown of Round Branches of Pinus koraiensis Sapling Plantation

This study researched on sapling of Korean pine, carrying out extensive research on different pruning pattern, including by proportion(quarter, one-third, half of crown height, treatment) and by different round branches from top(first,second,third) and controls.The results showed that: All treatments significantly improved diameter and length of round branches. When one-third of crown height were pruned, the promotion was most significant,the diameter of round branches were 140.87% higher than control,the length of round branches were 354.2% higher than control. When third round branches were pruned, the promotion was most significant, the diameter of round branches were 298.5% higher than control,the length of round branches were 211% higher than control. The pruning of stem has a great influence on the growth of lateral branches of 10-year-old Korean pine, but it has little influence on the growth of DBH due to the short test period.