|Table of Contents|

Seedling Growth Characteristics of 20 Ornamental Crabapple Clones

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2018年01
Page:
77-85
Research Field:
Publishing date:

Info

Title:
Seedling Growth Characteristics of 20 Ornamental Crabapple Clones
Author(s):
WU Qifei1; 2; FAN Junjun1; 2; JIANG Wenlong1; ZHANG Dandan1; LI Qianhui1; ZHANG Wangxiang1; 2
1.College of Forestry,Nanjing Forestry University,Nanjing,Jiangsu 210037；2.Yangzhou Crabapple Horticulture Co.Ltd.，Yangzhou,Jiangsu 225200
Keywords:
ornamental crabapple; growth rhythm; rapid growth period; growth
PACS:
-
DOI:
10.11937/bfyy.20171364
Abstract:
Using 20 ornamental crabapple cultivars 1-year-old grafting as test materials,the growth process of seedling height and diameter were investigated,and the Logistic equation was used to fit the growth process of seedling height and ground diameter.The aim of this study was to provide corresponding seedling raising measures according to the growth characteristics of different stages of 20 ornamental crabapple clones.The results showed that the height and diameters growth of all ornamental crabapple cultivars exhibited a ‘S’ shaped curve as ‘slow-fast-slow’ （R20.97).The growth process can be divided into three stages:initial growth stage,rapid growth period and later growth period.The starting time of the rapid growth period of height for 20 ornamental crabapple cultivars was from Apr.21th to Jun.17th,the ending time of the rapid growth period is from Jun.16th to Oct.4th.The rapid growth period was thus from 42 days to 138 days.The average height growth of rapid growth period was accounts for 58.78% of the total growth.The starting time of the rapid growth period of diameter for 20 ornamental crabapple cultivars was from Apr.1th to May.19th,the ending time of the rapid growth period was from Jul.2nd to Oct.28th.The rapid growth period was thus from 72 days to 148 days.The average diameter growth of rapid growth period was accounts for 59.79% of the total growth.According to the growth characteristics in seedling height and diameter of different cultivars,these ornamental crabapple cultivars could be divided into three types,namely,early-term growth type,medium-term growth and late-term growth type.And 85% of cultivars were belonging to the early-term growth and medium-term growth type.There were obvious differences in the time points for the starting time and period length of the rapid growth period of different ornamental crabapple cultivars.Meanwhile,there was a significant positive correlation between the growth of rapid growth period and total growth of seedling height （R2=0.929) and ground diameter （R2=0.899).Most ornamental crabapple cultivars were belonging to the early-term growth and medium-term growth type,so the water and fertilizer should be timely provided to seedling in the fast-growing period.

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Last Update: 2018-01-12