华南农业大学学报2017，Vol.38Issue(3)：87-92,6.DOI:10.7671/j.issn.1001-411X.2017.03.014
光照强度和容器规格对纳塔栎1年生容器苗生长的影响
Effects of light intensity and container size on growth of one-year-old seedlings of Quercus nuttallii
摘要
Abstract
[Objective] To study the growth rhythm of Nuttall oak (Quercus nuttallii) seedlings under different light intensities, find out the appropriate light intensity and container size for seedling growth, and provide a theoretical basis and guidance for cultivation and management of container seedlings in the future.[Method]Single factor experiments were used to study the effects of light intensities (50%,75% and 100%)and container sizes(8 cm×10 cm,10 cm×15 cm and 15 cm×20 cm)on seedling growth.Logistic equations were used to fit the growth of seedling height and ground diameter under different light intensities.[Result]At the early stage of growth (before June 26), shading clearly promoted growth of seedling height.By the end of the growth season, the increments of seedling height were not significantly different among light treatments.Throughout the growth season, ground diameter was significantly enhanced by shading with the optimal light intensity being 75%.The growth rhythms of seedling height and ground diameter were generally consistent.Shading shifted the initial and final stages of linear growth of seedling height to earlier time.The linear growth days (LGD) of 50% light was 21 days shorter compared to 100% light, and the LGD of 75% and 100% light were not significantly different, while the LGD of ground diameter of 50% and 100% light were longer 19 days and 16 days than that of 75% light, respectively.LGD of seedlings height was substantially longer than that of ground diameter,indicating that when seedling height growth stopped, the ground diameter continued to grow.Container size significantly influenced seedling height, ground diameter and the ratio of height to diameter.Seedling height and ground diameter significantly increased by larger containers, and both were the highest (98.83 cm and 11.68 mm) in the 15 cm×20 cm container.[Conclusion] Larger container (15 cm×20 cm) should be used to cultivate high quality seedlings of Q.nuttallii.Considering seedling height and ground diameter, we should use 50% light at the early stage of growth, then 75% light during the linear growth stage, and full light starting from Fall.At the late stage, ground diameter should be used as the index for detecting the ending of growth.关键词
纳塔栎/容器苗/苗高/地径/Logistic模型/容器规格/光照强度Key words
Quercus nuttallii/container seedling/seedling height/ground diameter/Logistic model/container size/light intensity分类
农业科技引用本文复制引用
李峰卿,姚甲宝,曾平生..光照强度和容器规格对纳塔栎1年生容器苗生长的影响[J].华南农业大学学报,2017,38(3):87-92,6.基金项目
国家级林业科学技术推广项目([2014] 06号) （[2014] 06号）
