江汉平原不同黑杨品种插干与带根造林生长对比分析  

Growth of Black Poplar Varieties in Cuttage Afforestation Without Roots and Afforestation With Roots in Jianghan Plain:Comparison Analysis

作　　者：张亚东[1] 龙开莲 黄国伟[1] 樊孝萍 张新叶[1] ZHANG Yadong;LONG Kailian;HUANG Guowei;FAN Xiaoping;ZHANG Xinye(Hubei Academy of Forestry,Wuhan 430075;Shishou Poplar Research Institute,Shishou,Hubei 434400)

机构地区：[1]湖北省林业科学研究院,武汉430075 [2]石首杨树研究所,湖北石首434400

出　　处：《中国农学通报》2023年第17期1-8,共8页Chinese Agricultural Science Bulletin

基　　金：国家重点研发计划项目“杨树大径级工业资源材精准高效培育技术研究”(2021YFD2201200)之课题“美洲黑杨大径级工业资源材精准高效培育技术研究”(2021YFD2201202)。

摘　　要：为更好地分析杨树不同品种在江汉平原地区插干造林与带根造林的生长情况,以4个黑杨品种为试验材料,开展插干造林与带根造林当年苗木的根系发育特征对比,以及连续5年的生长情况对比。结果表明,造林当年,4个品种插干造林的平均生根区间长度、平均总根数及总根重量皆明显大于带根造林的对应品种,两种方式造林的单根均长相差不大;造林当年苗木的总根重量和生根区间长度与苗木的胸径和树高生长量高度相关,且插干造林一年生苗木生长量明显优于带根造林。4个品种两种造林方式连续5年的对比结果表明,在不同品种间,无论是胸径和树高累计生长量还是各年度的净生长量都存在极显著差异,且4个品种5年间插干造林的苗木胸径和树高总生长量都大于带根造林的相应品种;在不同造林方式间,连续5年的胸径和树高性状总生长量及各年度净生长量也都存在显著或极显著差异;造林前3年,插干造林各品种的胸径和树高净生长量皆大于带根造林各品种,但随着林龄的增加,两种造林方式的苗木生长量差异呈逐年变小趋势。In order to analyze the growth of different poplar varieties in cuttage afforestation without roots and afforestation with roots in the Jianghan Plain,4 black poplar varieties were used as test materials to compare the root development characteristics of annual seedlings and the growth amount of the following five years.The results showed that the average rooting interval length,average total root number and total root weight of the 4 varieties in cuttage afforestation without roots were significantly greater than those of the corresponding varieties in afforestation with roots,and the difference of the average length of single root of the two afforestation methods was not significant.The total root weight and rooting interval length of annual seedlings were highly correlated with the growth amount of diameter breast height(DBH)and plant height of annual seedlings,and the growth of annual seedlings in cuttage afforestation without roots was significantly better than that in afforestation with roots.The comparison of the 4 varieties with two afforestation methods during five consecutive years showed that,among different varieties,there were highly significant differences of the total growth amount and the annual net growth amount of DBH and plant height,and the total growth amount of DBH and plant height of the 4 varieties during the five consecutive years in cuttage afforestation without roots were greater than those of the corresponding varieties in forestation with roots.Between the two afforestation methods,there were also significant or highly significant differences in the total growth amount and the annual net growth amount of DBH and plant height for the 5 consecutive years.In the first three years of afforestation,the net growth amount of DBH and plant height of each variety in cuttage afforestation without roots were greater than those in afforestation with roots,but with the increasing age of stand,the difference of growth amount between the two afforestation methods showed a decreasing trend year by ye

关 键 词：黑杨品种 插干造林 带根造林 江汉平原 

分 类 号：S725.7[农业科学—林木遗传育种]