白榆苗期年生长节律及生长模型研究  

Growth rhythm and models of the Ulmus pumila L.on nursery stage

作　　者：张江涛[1] 赵蓬晖[1] 杨淑红[1] 刘学昊 马永涛[1] 晏增[1] ZHANG Jiangtao;ZHAO Penghui;YANG Shuhong;LIU Xuehao;MA Yongtao;YAN Zeng(Henan Forest Academy,Zhengzhou 450008,China;State-owned Xinyang Nanwan Forest Farm in Henan Province,Xinyang 464000,China)

机构地区：[1]河南省林业科学研究院,郑州450008 [2]河南省国有信阳市南湾林场,信阳464000

出　　处：《上海农业学报》2024年第6期67-71,共5页Acta Agriculturae Shanghai

基　　金：河南省重大公益性科研专项(201300110900);河南省农业科学院自主创新项目(2023ZC107)。

摘　　要：对白榆7个优良无性系1年生嫁接苗地径和苗高的年生长节律进行了调查,并利用Logistic方程进行拟合,构建了白榆苗期生长曲线模型。结果表明:白榆苗期间歇性生长,生长进程为典型的“S”型曲线,表现出“慢-快-慢”的生长趋势,生长进程中都出现3—4次生长高峰,不同峰值之间差别不大,地径生长相对于苗高生长有滞后性。白榆幼苗生长期较长,属于全期生长型。225号苗木是苗高生长表现最优的无性系,生长速度和速生时间均优于其他无性系;43号苗木的生长量最低。Logistic方程拟合效果显著,相关系数r均在0.97以上。将白榆杂交无性系苗期生长进程分为生长前期、快速生长期和生长后期,苗木在快速生长期内的各生长量占总生长量的65.4%—81.7%。在白榆的生产实践中,应根据苗木不同生长阶段的生长特性提出相应的育苗管理措施。The annual growth rhythms of basal diameter and seedling height in one-year-old grafted seedlings of seven Ulmus pumila L.clones were investigated,and growth curves were modeled using the Logistic equation.The results demonstrated that Ulmus pumila L.exhibited intermittent growth characteristics during the nursery stage,following a typical S-shaped growth curve with a“slow-fast-slow”pattern.The growth process included three to four distinct growth peaks,with minimal differences between peak values.Notably,basal diameter growth lagged behind seedling height growth.The seedlings exhibited an extended growth period,characteristic of a full-season growth type.Among the clones,Clone 225 showed superior performance in terms of height growth,with both faster growth rates and longer durations of rapid growth compared to other clones.Conversely,Clone 43 exhibited the lowest growth performance.The Logistic equation provided a highly accurate fit,with correlation coefficients exceeding 0.97 for all cases.The seedling growth process of Ulmus pumila L.was divided into three phases:pre-growth period,fast-growth period and post-growth period.During the fast-growth period,growth increments accounted for 65.4%-81.7%of the total growth.These findings suggest that nursery management practices should be tailored to the specific growth characteristics at different developmental stages.

关 键 词：白榆 苗期 年生长节律 LOGISTIC方程 

分 类 号：S722[农业科学—林木遗传育种]