梓树属6个无性系物候与生长节律观测  

Observation on Phenology and Growth Rhythms of Six Catalpa Clones

作　　者：陈慧玲[1] 黄国伟[1] 马林江[1] 张新叶[1] 樊孝萍[2] 荣新军[2] Chen Huiling;Huang Guowei;Ma Linjiang;Zhang Xinye;Fan Xiaoping;Rong Xinjun(Hubei Academy of Forestry,Wuhan 430075,P.R.China;Shishou Research Institute of Poplars,Forestry Academy of Hubei Province)

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

出　　处：《东北林业大学学报》2021年第8期11-17,共7页Journal of Northeast Forestry University

基　　金：中央财政林业科学推广示范资金项目(鄂[2018]TG12号);湖北省技术创新专项重大项目(2016ABA111)。

摘　　要：对湖北适生的梓树属6个无性系(2个滇楸无性系,4个楸树无性系)3年生苗的物候、株高、地径、冠幅及侧枝生长量进行为期1 a的观测,并利用Logistic方程进行拟合,分析梓树属6个无性系3年生苗木的物候期及生长节律。结果表明:梓树属各无性系于3月下旬到4月上旬萌芽;4月中上旬展叶;速生期于6月中下旬至7月上旬开始,11月初结束;叶变色期为11月中旬;落叶期为11月下旬;休眠期从12月初开始到次年3月结束。不同无性系的物候差异主要发生在生长前期。6个无性系Logistic方程拟合精度高,其中株高、地径、冠幅年生长量表现出明显“慢—快—慢—快—慢”的节律,侧枝年生长量表现出明显“慢—快—慢”的节律。根据生长曲线可将梓树属的生长过程划分为生长前期、速生期、生长后期3个阶段。在梓树属生长速生关键期加强水肥管理,可促进苗木快速生长。With six Catalpa clones suitable for Hubei Province,the phenology,plant height,ground diameter,crown width and lateral branch growth were observed for one year,Logistic equations were used to fit the growth in plant height,ground diameter,crown width and lateral branch growth,and phenophase and growth rhythm were analyzed.The phenology of different Catalpa clones is budding from late March to early April,Mid-April exhibition leaves,the fast-growing period beginning in mid-June and early July-early and ending in early November,leaf discoloration in mid-November,falling leaves in late November,the dormant period beginning in early December and ending in March of the following year.The phenological differences of different clones mainly occur in the pre-growth stage.Six Catalpa clones Logistic equation fitting precision is high,the plant height,ground diameter and crown width showed obvious rhythm of“slow-fast-slow-fast-slow”.The rhythm of lateral branch showed obvious“slow-fast-slow”.According to the growth curve of Catalpa growth process can be divided into growth prophase,fast-growing period and three stages at later growth stage,can grow in Catalpa fast growth stage in order to strengthen the management of sewage sludge,and promote seedling growth.

关 键 词：梓树属 楸树 滇楸 物候 生长节律 LOGISTIC方程 

分 类 号：S722.7[农业科学—林木遗传育种]