Growth and photosynthetic physiology for two groups of Phoebe bournei plus tree seedlings
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摘要: 采集福建政和11个闽楠Phoebe bournei优树和福建建瓯13个闽楠优树种子为试验材料，进行容器育苗试验，测定不同优树苗木生长及光合速率和蒸腾速率，以了解不同闽楠优树的苗期变异性。结果表明：24个闽楠优树的1~2年生子代苗高、地径、生物量及光合、蒸腾指标均存在显著差异（P＜0.05）。2年生苗高、地径和生物量变异大于1年生苗，变化幅度分别为29.3~56.4 cm，3.50~4.91 cm和5.985~27.965 g，变异系数分别为27.6%，14.8%和37.6% 。2年生闽楠苗光合速率、蒸腾速率、光能利用效率和水分利用效率变化幅度分别为2.081~5.122 molm－2s－1，0.715~1.829 mmolm－2s－1，4.36%~12.31%和2.224~3.703 mmolmol－1，变异系数分别为6.1%，21.9%，19.7%和13.8%。1~2年生闽楠优树子代的苗高、地径和生物量均以福建建瓯8号优树表现最好。因此，福建建瓯的优树子代生长、生理特性都优于福建政和的优树。按20%的入选率，筛选出J8，J1，J13，J12，J4等5 个优树。表6参23Abstract: To understand variability in different plus tree seedlings of Phoebe bournei, seeds from 11 plus trees from Zhenghe, Fujian Province were compared to 13 plus trees from Jianou, Fujian Province for growth indices, photosynthetic rate, and transpiration rate of one-to two-year-old seedlings in a container seedling experiment. Results showed strong differences in height, ground diameter, biomass, photosynthesis, and transpiration among the progeny. Two-year-old seedlings were greater than one-year-old seedlings with average height of 56.4 compared to 29.3 cm ［coefficient of variation （cv） of 27.6%］, average ground diameter of 4.91 compared to 3.50 cm （cv of 14.8%）, and average biomass variation of 27.965 compared to 5.985 g （cv of 37.6%）. Two-year-old families compared to one-year-old had an average net photosynthetic rate of 5.122 compared to 2.081 molm－2s－1 （cv of 6.1%）, average transpiration rate of 1.829 compared to 0.715 mmolm－2s－1 （cv of 21.9%）, average water utilization efficiency of 12.31% compared to 4.36% （cv of 19.7%）, and average light energy utilization efficiency of 3.703 compared to 2.224 mmolmol－1 （cv of 13.8%）. The family seedling of No. 8 plus tree（J8） from Jianou, Fujian had the best growth performance in height, round diameter, biomass, net photosynthetic rate, water utilization efficiency, and light energy utilization efficiency. So the growth and physiology characteristics of plus trees from Jianou, Fujian were superior to Zhenghe, Fujian. Based on a selection rate of 20%, five plus trees（J8, J1, J13, J12, and J4） were chosen.［Ch, 6 tab. 23 ref.］
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https://zlxb.zafu.edu.cn/article/doi/10.11833/j.issn.2095-0756.2016.01.007
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