论文部分内容阅读
1、整枝开始的年龄、间隔期与整枝高度 泡桐是速生树种,整枝宜在栽植后第二年冬季开始,若苗大、干高可推迟至3～4年再开始进行。间隔期以2年为宜,整枝高度以4米为宜。 2、整枝的季节。在晚秋或早春进行,因这时树液已停止流动或尚未流动,养分大都蕴藏在根部,整枝后营养物质损失少,不影响生长。而在这两个季节中以早春整枝效果最好,因为早春整枝后,很快进入生长季节,伤口容易愈合,晚秋整枝切口暴露在寒冷气候条件下的时间较长,易受冻害,在北方较冷地区与较寒冷年份不宜采用。 3、整枝强度。泡桐的整枝一般是弱度整枝与
1, the age of the pruning period, the interval between the height of the pruning and Paulownia is a fast-growing tree species, pruning should be planted in the second year after the start of winter, if the seedlings, stem height can be postponed to 3 to 4 years and then started. Interval to 2 years is appropriate, the whole branch height of 4 meters is appropriate. 2, the season of pruning. In late autumn or early spring, because the tree liquid has stopped flowing or not flowed, most of the nutrients stored in the roots, less damage to nutrients after pruning, does not affect the growth. In these two seasons, pruning was the best in early spring because pruning in early spring quickly entered the growing season and the wound was easy to heal. In late autumn, pruning incisions were exposed to cold climates for a long time and were susceptible to frost damage. In northern China, Cold areas and colder years should not be used. 3, pruning strength. Paulownia pruning generally weak branches and pruning