洞庭湖区11个杨树新无性系的生长差异  

Growth Variation of Eleven New Poplar Clones in Dongting Lake Area,Hunan

作　　者：唐作钧[1] 张国君 潘惠新[3] 肖兴翠[4] 

机构地区：[1]中国林业科学研究院,北京100091 [2]泰格林纸集团股份有限公司 [3]南京林业大学 [4]中南林业科技大学

出　　处：《东北林业大学学报》2012年第4期14-17,54,共5页Journal of Northeast Forestry University

基　　金：国家产业化升级项目(20100400405)

摘　　要：为选择出更多适合在洞庭湖区造林的优良杨树无性系,对引进的11个杨树新无性系与南林-95和南林-895在洞庭湖区进行了造林对比试验。对7年生杨树无性系的生长量分析结果表明:11个无性系中,有4-6、7-40、1-20、7-45、2-2无性系胸径、树高、单株材积生长量超过了南林-95和南林-895。其中无性系4-6最具生长优势,胸径、树高、单株材积分别为30.4 cm、25.0 m、0.6956 m3.株-1,材积生长量分别比南林-95和南林-895提高51.0%和55.8%;其次是7-40、1-20、7-45、2-2这4个无性系,无性系4-6的胸径和单株材积与这4个无性系没有显著差异,与其余无性系均有显著或极显著差异;5个无性系中的4-6、7-40、1-20、7-45,这4个新无性系材积生长量均比南林-95和南林-895提高15.0%以上,在洞庭湖区都具有很大的生长优势,且均有前期速生的特点。An afforestation comparison test was conducted between eleven new poplar clones and NL-95 and NL-895 in order to select more superior poplar clones suitable for afforestation in Dongting Lake area.The growth of the 7-year-old poplar clones showed that,among the eleven clones,diameter at breast height（DBH）,tree height,volume increment of five clones 4-6,7-40,1-20,7-45 and 2-2 were higher than those of NL-95 and NL-895.The DBH,tree height,volume increment of the clone 4-6 were 30.4 cm,25.0 m and 0.695 6 m3,respectively.Compared with NL-95 and NL-895,the volume increment of the cone 4-6 increased by 51.0% and 55.8%,respectively.The clone 4-6 exhibited the best growth status,followed by four clones 7-40,1-20,7-45 and 2-2.There were no significant differences in DBH and vo-lume increment between the clone 4-6 and the four clones 7-40,1-20,7-45 and 2-2;however,there were significant or highly significant differences between the cone 4-6 and the rest clones.The volume increments of four clones 4-6,7-40,1-20,and 7-45 increased by more than 15% compared with those of NL-95 and NL-895.The four clones 4-6,7-40,1-20,and 7-45 have great growth advantage in Dongting Lake area,and they all exhibit fast growth in the early stages.

关 键 词：杨树(Poplusspp.) 无性系 胸径 树高 单株材积 洞庭湖区 

分 类 号：S792.11[农业科学—林木遗传育种] S758[农业科学—林学]