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[1]李茂,任正标,郑鸣鸣,等.指数施肥对杉木优良无性系生长和光合特性的影响*[J].应用与环境生物学报,2020,26(02):1-13.[doi:10.19675/j.cnki.1006-687x.2019.05045]
 LI Mao,REN Zhengbiao,ZHENG Mingming,et al.Effects of exponential fertilization on the growth and photosynthetic characteristics of superior clone of Cunninghamia lanceolata*[J].Chinese Journal of Applied & Environmental Biology,2020,26(02):1-13.[doi:10.19675/j.cnki.1006-687x.2019.05045]
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指数施肥对杉木优良无性系生长和光合特性的影响*()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
26卷
期数:
2020年02期
页码:
1-13
栏目:
研究论文
出版日期:
2020-03-20

文章信息/Info

Title:
Effects of exponential fertilization on the growth and photosynthetic characteristics of superior clone of Cunninghamia lanceolata*
作者:
李茂12任正标12郑鸣鸣12洪凯12许珊珊12叶义全 12 林开敏12**
1福建农林大学林学院 福州 350002
2国家林局杉木工程技术研究中心 福州 350002
Author(s):
LI Mao 12 REN Zhengbiao 12 ZHENG Mingming 12 HONG Kai12XU Shanshan 12 YE Yiquan 12 LIN Kaimin 12*
1 Forestry College,Fujian Agriculture and Forestry University, Fuzhou, 350002, China
2 State Forestry and Grassland Administration Engineering Research Center of Chinese Fir, Fuzhou, 35002, China)
关键词:
数施肥光合特性杉木优良无性系
Keywords:
exponential fertilization photosynthetic characteristics Cunninghamia lanceolata superior clone
DOI:
10.19675/j.cnki.1006-687x.2019.05045
摘要:
为探明施肥对杉木优良无性系幼苗光合特性的影响,以杉木优良无性系轻基质扦插苗为试验材料,设置6个处理:对照CK(0 mg/株)、常规集中施肥CF(40 mg/株)、指数施肥EF1(40 mg/株)、EF2(80 mg/株)、EF3(120 mg/株)、EF4(160 mg/株),比较杉木幼苗的生长和光合生特性对不同施肥处理响应的差异,筛选出适合杉木优良无性系生长的施肥方式和浓度,为杉木苗期氮素养分管理提供参考。结果表明与对照相比,施肥对杉木的苗高和地径的生长具有明显的促进作用;在相同施氮量下,指数施肥处理(EF1)下杉木的苗高和地径都优于常规施肥,但二者之间差异不显著(P>0.05)。指数施肥处理下叶片最大荧光(Fm)、可变荧光(Fv)PSⅡ最大光化学效率(Fv/Fm)、PSⅡ潜在活性(Fo/Fv)和实际最大量子产额(QY)均显著高于对照和常规施肥处理,且除Fv/Fm外,其余各指标均在EF3(120 mg/株)时达到最大值,叶片初始荧光(Fo)和非光化学猝灭(NPQ)低于对照处理。施肥处理显著了叶片净光合速率(Pn)、气孔导度(Gs)、蒸腾速率(Tr)胞间二氧化碳浓度(Ci)素含量,在相同施氮量下指数施肥处理(EF1)叶片PnGs、Tr、Ci、叶绿体色素和类胡萝卜素含量显著高于常规施肥,随着施氮量的增加杉木均先增加后降低的趋势,在施氮量为120 mg/株时达到最大。PSⅡ光化学效率和电子传递速率,降低光能的热耗散,增强杉木叶片光合速率,促进杉木幼苗生长因此杉木优良无性系的施氮量为120 mg/株。
Abstract:
An exponential fertilization (EF) experiment with five nitrogen dose levels (0, 40, 80, 120, and 160 mg/plant) and combined with conventional fertilization (CF) with 40 mg/plant nitrogen level were conducted in the study by using the cutting seedlings of superior clone of Cunninghamia lanceolata to investigate the responses of growth and photosynthetic characteristics of C. lanceolata seedlings under various fertilization treatments, and to select the most suitable fertilization manner and nitrogen level for the growth of superior clone of C. lanceolata, providing reference for nitrogen management of C. lanceolata seedlings. The results showed that (1) The height and ground diameter of C. lanceolata seedlings were increased obviously under various fertilization treatments as compared with control. Under the same nitrogen level, although the seedlings height and ground diameter of C. lanceolata in EF1 treatment was higher than that in CF treatment, no significant differences was observed between these two treatments. (2) The maximal fluorescence (Fm’), variable fluorescence (Fv), PSⅡ maximal photochemical efficiency (Fv/Fm), PSⅡpotential efficiency (Fo/Fv) and actual maximum quantum yield (QY) were significantly higher in EF treatment than that in control and CF treatments, and these indexes were all reached its maximum at 120 mg/plant nitrogen level except for Fv/Fm which was slightly lower in EF3 than that in EF4. An obviously lower of initial fluorescence (Fo) and non-photochemical quenching coefficient (NPQ) were observed in EF treatments as compared with control. (3) The net photosynthetic rate (Pn), stomatal conductance (Gs), transpiration rate (Tr), intercellular CO2 concentration (Ci), the contents of chloroplast pigments and carotenoid in leaves of C.lanceolata were significantly increased under various fertilization treatments, and the Pn, Gs, Tr, Ci, chloroplast pigments content and carotenoid content in exponential fertilization treatment (EF1) was significantly higher than that in CF with the same nitrogen fertilization level, and these indexes were all showed the trend of first increase and then decrease along with increasing nitrogen levels from 0 to 160 mg/plant, and arrived their maximum at 120 mg/plant nitrogen level except for chloroplast pigments content. Therefore, exponential fertilization with 120 mg/plant nitrogen level can significantly enhanced leaves photosynthesis rate by increasing PSⅡ?photochemistry?activity and electron transfer rate, while decreasing thermal dissipation of light energy, which in turn promoted the growth of C. lanceolata seedlings, thus 120 mg/plant nitrogen level would be the suitable one for the growth of superior clone of C. lanceolata seedlings.

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备注/Memo

备注/Memo:
收稿日期 Received: 2019-05-27 接受日期 Accepted: 2019-07-10
*国家重点研发计划项目(2016YFD0600301)资助
**通讯作者 Corresponding author (E-mail: lkmyx@163.com)
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更新日期/Last Update: 2019-07-30