修枝起始年龄和季节对Ⅰ-69杨修枝口愈合的影响  

Influence of initial pruning age and seasons for coalescence process of pruning wound on stem of Populus deltoides 'Lux'

作　　者：马永春[1,2] 佘诚棋[2] 张瑶[2] 孙万荣 方升佐[1] 

机构地区：[1]南京林业大学森林资源与环境学院,南京210037 [2]安徽省林业科技推广总站 [3]铜陵县林业局

出　　处：《林业科技开发》2012年第2期72-74,共3页China Forestry Science and Technology

基　　金：国家林业局林业公益性行业科研专项(编号:201004004);安徽省学术和技术带头人及后备人选学术科研活动资助经费项目;安徽省科技攻关计划项目(编号:09010304023)

摘　　要：对2007年春营造的Ⅰ-69杨进行了不同修枝处理,探讨了修枝起始年龄、修枝季节对修枝口愈合的影响。结果表明:Ⅰ-69杨修枝口(宽度W)越小,其完全愈合所需时间越短,完全愈合率也越高,宽度W<4 cm修枝口的完全愈合率明显大于W≥4 cm修枝口。修枝口愈合受到修枝枝龄的影响,随着枝龄的增长,较大修枝口所占比重增大,死枝修枝口数量也增多,修枝口的完全愈合率和愈合生长率均下降。修枝口愈合也受到修枝季节的影响,与冬季、夏季修枝相比,春季修枝的完全愈合率、愈合生长率明显较高。综合考虑修枝对杨树胸径生长量的影响,笔者认为Ⅰ-69杨的修枝起始年龄以第1轮枝条的年龄达到4年时为宜,修枝季节以春季(3月下旬至4月上旬)为宜。A pruning trial of Populus deltoides ＇Lux＇ planted in the spring of 2007 was established and influence of the initial pruning age and pruning season on wound coalescence was investigated.The result showed that： the smaller the pruning wound＇s width was,the shorter the full-coalescence time was,and the higher the full-coalescence rate of pruning wound.Especially,the full-coalescence rate of pruning wound whose width was less than 4 cm was much higher than that of pruning wound whose width was more than 4 cm.Pruning wound coalescence was influenced by initial pruning age,while the pruning wound＇s size was affected by branch ages.The more number of large branches and dead branches were observed as initial pruning age increasing,as well as the lower rate of full-coalescence was detected.Pruning wound coalescence was also influenced by pruning season.When branches were pruned in spring,the rate of full-coalescence and the rate of coalescence growth of pruning wound were much higher than in winter or summer.In view of the pruning＇s influence on DBH growth,it is suggested that the suitable initial pruning age for poplar plantation is 4 years old,and the suitable pruning season is spring（from later March to early April）.

关 键 词：杨树人工林 修枝口 修枝起始年龄 修枝季节 完全愈合率 

分 类 号：S792.110.4[农业科学—林木遗传育种]