[1]刘福妹,劳庆祥,庞圣江,等. 不同氮素水平对米老排苗期生长和叶绿素荧光特性的影响[J].西北林学院学报,2018,33(1):62-67.[doi:10.3969/j.issn.1001-7461.2018.01.10]
　LIU Fu-mei*,LAO Qing-xiang,PANG Sheng-jiang,et al. Effects of Nitrogen Fertilization on Growth Performance and Chlorophyll Fluorescence Parameters of Mytilaria laosensis Seedlings[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2018,33(1):62-67.[doi:10.3969/j.issn.1001-7461.2018.01.10]
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 不同氮素水平对米老排苗期生长和叶绿素荧光特性的影响()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第33卷
期数:
2018年第1期
页码:
62-67
栏目:
出版日期:
2018-01-31

文章信息/Info

Title:
 Effects of Nitrogen Fertilization on Growth Performance and Chlorophyll Fluorescence Parameters of Mytilaria laosensis Seedlings
文章编号:
1001-7461(2018)01-0062-06
作者:
 刘福妹1; 2; 劳庆祥1; 庞圣江1; 马跃1; 陈建全1; 韦菊玲1
 （1.中国林科院 热带林业实验中心，广西 凭祥 532600；2.广西友谊关国家森林生态系统定位观测研究站，广西 凭祥 532600）
Author(s):
 LIU Fu-mei1; 2*; LAO Qing-xiang1; PANG Sheng-jiang1; MA Yue1; CHEN Jian-quan1; WEI Ju-ling1
 (1.The Experimental Centre of Tropical Forestry,Chinese Academy of Forestry,Pingxiang,Guangxi 532600,China; 2.Guangxi Youyiguan Forest Ecosystem Research Station,Pingxiang,Guangxi 532600,China)
关键词:
 ; 米老排; 氮素营养; 生长; 叶绿素荧光参数
Keywords:
Mytilaria laosensis;  nitrogen fertilization;  growth;  chlorophyll fluorescence
分类号:
S753.51
DOI:
10.3969/j.issn.1001-7461.2018.01.10
文献标志码:
A
摘要:
 为探讨不同氮素水平对米老排苗期生长的影响，采用根部施肥的方法，研究了5个氮素条件下(总施氮量分别是100、200、400、600 mg·株-1和800 mg·株-1)米老排幼苗生长和荧光特性的差异。结果表明：1）米老排的苗高、地径和总生物量均会随着施用氮素水平的增加，呈现先升高后降低的规律，均在N2(200 mg·株-1)时达到最大值（40.52 cm、4.98 mm和4.07 g），依次较对照处理提高了145.7%、152.8%和158.4%；2）氮肥能够促进米老排幼苗叶片叶绿素含量的增加；3）随着氮水平的增加，实际光化学效率（ΦPSⅡ）、PSⅡ最大光化学效率（Fv/Fm）、光化学猝灭系数（qP）均是先升高后降低，非光化学猝灭系数（NPQ）则先降后升，且均是在N2时达到最大值和最小值，说明适当增加供氮水平可以显著提高米老排幼苗的光合效率；4）200 mg·株-1的施氮量最适合米老排幼苗的生长。
Abstract:
 To study growth response of Mytilaria laosensis seedlings to nitrogen supply,growth performance and chlorophyll fluorescence of the seedlings were investigated under five nitrogen levels: 100,200,400,600,and 800 mg per seedling.The results showed that 1) height,ground diameter and total biomass of the seedlings increased initially,and then decreased with the increase of nitrogen supply,compared with the control,they all reached the maximum (40.52 cm,4.98 mm,and 4.07 g) under the nitrogen level of 200 mg/plant,and increased by 145.7%,152.8% and 158.4% ,respectively.2) The nitrogen fertilization could significantly enhance the chlorophyll contents of the seedlings.3) The maximum photochemical efficiency of PSⅡ(Fv/Fm),the actual photosynthetic efficiency (ΦPSⅡ) and photochemical quenching (qP) all showed a trend of initial increase followed by decrease with the increase of nitrogen supply,while the non-photochemical quenching (NPQ) presented an opposite trend,their maximum and or minimum values all were in the nitrogen level of 200 mg per seedling,suggesting that the appropriate nitrogen supply could significantly promote the photosynthetic efficiency of M.laosensis seedlings.4) As a whole,200 mg N/seedling was the most appropriate level of nitrogen supply to promote seedling growth of this species.

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备注/Memo

备注/Memo:
 收稿日期：2017-06-23修回日期：2017-09-20
基金项目：中央级公益性科研院所基本科研业务费专项资金（CAFYBB2017QA027）；中国林科院热带林业实验中心主任基金（RL2015-07）。
作者简介：刘福妹，女，在读博士，工程师，研究方向：林木遗传育种。E-mail：liufumei1115@163.com
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