Research on Annual Growth Rhythm of Grafted Seedlings of <i>Magnolia dawsoniana</i>

WU Jie; PENG Ke-zhong; LIU Yan-yun; YANG Dong; LAN Chang-jun

doi:10.16779/j.cnki.1003-5508.2017.02.012

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Volume 38 Issue 2

Nov. 2019

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Article Navigation > Journal of Sichuan Forestry Science and Technology > 2017 > 38(2): 65-71

WU Jie, PENG Ke-zhong, LIU Yan-yun, YANG Dong, LAN Chang-jun. Research on Annual Growth Rhythm of Grafted Seedlings of Magnolia dawsoniana[J]. Journal of Sichuan Forestry Science and Technology, 2017, 38(2): 65-71. doi: 10.16779/j.cnki.1003-5508.2017.02.012

Citation:

WU Jie, PENG Ke-zhong, LIU Yan-yun, YANG Dong, LAN Chang-jun. Research on Annual Growth Rhythm of Grafted Seedlings of Magnolia dawsoniana[J]. Journal of Sichuan Forestry Science and Technology, 2017, 38(2): 65-71. doi: 10.16779/j.cnki.1003-5508.2017.02.012

Research on Annual Growth Rhythm of Grafted Seedlings of Magnolia dawsoniana

doi: 10.16779/j.cnki.1003-5508.2017.02.012

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Ganzi Prefecture Forest Research Institute, Kangding 626001, Sichuan

Received Date: 2016-12-13

Abstract

Based on the data of the height and basal diameter growth of Magnolia dawsoniana grafted seedlings,the growth rhythm was analyzed by Logistic equation.The results showed that (1) taking Magnolia biondii as the rootstocks for grafting M.Dawsoniana could obviously promote the growth of M.Dawsoniana.The annual growth of grafted seedlings was closer to the growth of the sprout seedlings of M.biondii and significantly higher than the growth of 2-year old M.Dawsoniana seedlings.(2)The growth of seedling height exhibited a "S-shaped" curve as "slow-fast-slow" while that of basal diameters growth were presented as a "double S-shaped" curve as "slow-fast-slow-fast-slow".(3) The growth period of seedling growth process could be divided into three parts:the initial growth stage (before June 26th),the fast-growing period (from June 26th to August 15th) and the late growth period (from August 15th to October 18th),The duration of fast-growing period was 50 days,and the fast-growing period of cumulative growth accounted for 56.92% of the theoretic maximum number.(4) The basal diameter growth process could be divided into three stages:the initial growth stage (before May 27th),the fast-growing period I (from May 27th to June 12th),the transition period (from June 12th to July 26th),the fast-growing period Ⅱ (from July 26th to August 13th) and the late growth period (from August 13th to October 18th),besides,the cumulative time of the fast-growing period I and the fast-growing period Ⅱ were 34 days,and the total cumulative growth accounted for 61.8% of the theoretic maximum number.
- Magnolia dawsoniana;
- Grafted seedling;
- Growth rhythm;
- Logistic equation
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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

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Research on Annual Growth Rhythm of Grafted Seedlings of Magnolia dawsoniana

doi: 10.16779/j.cnki.1003-5508.2017.02.012

Ganzi Prefecture Forest Research Institute, Kangding 626001, Sichuan

Received Date: 2016-12-13

Key words:

Abstract: Based on the data of the height and basal diameter growth of Magnolia dawsoniana grafted seedlings,the growth rhythm was analyzed by Logistic equation.The results showed that (1) taking Magnolia biondii as the rootstocks for grafting M.Dawsoniana could obviously promote the growth of M.Dawsoniana.The annual growth of grafted seedlings was closer to the growth of the sprout seedlings of M.biondii and significantly higher than the growth of 2-year old M.Dawsoniana seedlings.(2)The growth of seedling height exhibited a "S-shaped" curve as "slow-fast-slow" while that of basal diameters growth were presented as a "double S-shaped" curve as "slow-fast-slow-fast-slow".(3) The growth period of seedling growth process could be divided into three parts:the initial growth stage (before June 26th),the fast-growing period (from June 26th to August 15th) and the late growth period (from August 15th to October 18th),The duration of fast-growing period was 50 days,and the fast-growing period of cumulative growth accounted for 56.92% of the theoretic maximum number.(4) The basal diameter growth process could be divided into three stages:the initial growth stage (before May 27th),the fast-growing period I (from May 27th to June 12th),the transition period (from June 12th to July 26th),the fast-growing period Ⅱ (from July 26th to August 13th) and the late growth period (from August 13th to October 18th),besides,the cumulative time of the fast-growing period I and the fast-growing period Ⅱ were 34 days,and the total cumulative growth accounted for 61.8% of the theoretic maximum number.