The Effects of the Growth Regulator Paclobutrazol on Physiological Characteristics of Rain Tree (Albizia saman Jacq. Merr.)

IF 1.3 Q4 ENGINEERING, ENVIRONMENTAL
F. Fathurrahman, Siti Zahrah, E. Ernita, H. Heriyanto, Imam Mahadi
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Abstract

The increase of carbon dioxide (CO 2 ) has been identified since the industrial revolution era. Albizia saman is a tree species which can absorb excess CO 2 from the atmosphere in large quantities. This study was to identify the effect of spraying time and concentration of paclobutrazol on the growth of A. saman seedlings. This research using a completely randomized design, the first factor is spraying time which is divided into three levels: spraying at age of 25, 50 and 75 days. The second one is the concentration of paclobutrazol, consisting of four levels: control, 75, 150 and 225 mol·L -1 . The further test used are DMRT at p<0.05. Paclobutrazol influences the higher rate of pho - tosynthesis, namely 38.27 M CO 2 m -2 s -1 . There are varied stomatal conductance values, where the highest value is 0.35 mM m -2 s -1 and the lowest carbon dioxide content in treatment is 56.86 mol·L -1 . The slowest transpiration rate is the combination of 50 days after treatment, and the concentration of paclobutrazol is 0.24 mM H 2 O m -2 s -1 . The shortest growth of A. saman is shown from the 50-day treatment using paclobutrazol and 150 mol·L -1 concentration. The relationship between photosynthetic rate and stomatal conductance and transpiration concludes that the trend is similar to that of the curve, whereas the trend is not the same as the internal CO 2 .
生长调节剂 Paclobutrazol 对雨树(Albizia saman Jacq. Merr.)
自工业革命时代以来,二氧化碳(CO 2)的增加已被确定。合欢树是一种能够大量吸收大气中过量二氧化碳的树种。本试验旨在研究多效唑喷施时间和浓度对沙曼幼苗生长的影响。本研究采用完全随机设计,第一个因素是喷施时间,将喷施时间分为三个水平:25天、50天和75天。二是多效唑浓度,由对照、75、150、225 mol·L -1四个水平组成。进一步采用DMRT检验,p<0.05。多效唑影响较高的光合速率,即38.27 M CO 2 M -2 s -1。气孔导度值变化较大,最高为0.35 mM m -2 s -1, co2含量最低为56.86 mol·L -1。蒸腾速率最慢的是处理后50天的组合,多效唑浓度为0.24 mM H 2 O m -2 s -1。以150 mol·L -1浓度的多效唑处理50 d时,沙蔓生长最短。光合速率与气孔导度和蒸腾的关系与曲线的变化趋势相似,但与内部co2变化趋势不同。
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来源期刊
Journal of Ecological Engineering
Journal of Ecological Engineering ENGINEERING, ENVIRONMENTAL-
CiteScore
2.60
自引率
15.40%
发文量
379
审稿时长
8 weeks
期刊介绍: - Industrial and municipal waste management - Pro-ecological technologies and products - Energy-saving technologies - Environmental landscaping - Environmental monitoring - Climate change in the environment - Sustainable development - Processing and usage of mineral resources - Recovery of valuable materials and fuels - Surface water and groundwater management - Water and wastewater treatment - Smog and air pollution prevention - Protection and reclamation of soils - Reclamation and revitalization of degraded areas - Heavy metals in the environment - Renewable energy technologies - Environmental protection of rural areas - Restoration and protection of urban environment - Prevention of noise in the environment - Environmental life-cycle assessment (LCA) - Simulations and computer modeling for the environment
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