首页|光氮互作对八角幼苗生长和生理特性的影响

光氮互作对八角幼苗生长和生理特性的影响

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为给八角(Illicium verum)壮苗培育提供参考,以半年生八角幼苗为试验材料,采用3种光照强度[100％NS(Natural Sunlight)、72.8％NS和46.3％NS]和4种氮素水平(0、200、400和600毫克/株)双因素试验,探究光氮互作对八角幼苗生长和生理特性的影响.结果表明,光照强度对株高、地径、叶绿素含量、渗透调节物质含量、丙二醛(MDA)含量和抗氧化酶活性的影响均最大.在同一氮素水平下,随光照强度降低,除L0N0～L2N0处理的株高增量外,L0N1～L2N1、L0N2～L2N2和L0N3～L2N3处理的株高增量均呈先升后降的趋势;L0N0～L2N0和L0N2～L2N2处理的地径增量均呈先升后降的趋势,L0N1～L2N1和L0N3～L2N3处理的地径增量均下降;L0N1～L2N1处理的叶绿素含量呈先升后降的趋势,L0N0～L2N0、L0N2～L2N2和L0N3～L2N3处理的叶绿素含量均升高;L0N0～L2N0和L0N1～L2N1处理的可溶性糖含量均下降,L0N2～L2N2和L0N3～L2N3处理的可溶性糖含量均呈先升后降的趋势;L0N0～L2N0处理的可溶性蛋白和MDA含量均下降,L0N1～L2N1、L0N2～L2N2和L0N3～L2N3处理的可溶性蛋白和MDA含量均呈先降后升的趋势;L0N0～L2N0和L0N3～L2N3处理的SOD活性均呈先降后升的趋势,L0N1～L2N1和L0N2～L2N2处理的SOD活性均下降;不同处理的干重和POD活性均呈先升后降的趋势.隶属函数分析表明,L1N1(72.8％NS,200毫克/株氮素)处理的八角幼苗生长最优.
Effects of Light and Nitrogen Interactions on Growths and Physiological Characteristics of Illicium verum Seedlings
In order to provide references for cultivation of Illicium verum seedlings, taking half-year-old I. ver-um seedlings as experimental materials, two-factor experiment with three light intensities [100％ NS (Natural Sunlight), 72.8％ NS and 46.3％ NS] and four nitrogen levels (0, 200, 400 and 600 mg/plant) was used to ex-plore effects of different light and nitrogen interactions on growths and physiological characteristics of I. verum seedlings. Results showed that light intensity had the strongest effects on plant height, ground diameter, chloro-phyll contents, contents of osmotic adjustment substances, malondialdehyde (MDA) content, and antioxidant en-zyme activities. In the same nitrogen level, with decrease of light intensity, except for plant height increments in L0N0-L2N0 treatments, plant height increments in L0N1-L2N1, L0N2-L2N2 and L0N3-L2N3 treatments showed trends of firstly increase and then decrease. Ground diameter increments in L0N0-L2N0 and L0N2-L2N2 treatments showed trends of firstly increase and then decrease, while those in L0N1-L2N1 and L0N3-L2N3 treatments decreased. Chlorophyll contents in L0N1-L2N1 treatments showed trends of firstly increase and then decrease, while those in L0N0-L2N0, L0N2-L2N2 and L0N3-L2N3 treatments increased. Soluble sugar contents in L0N0-L2N0 and L0N1-L2N1 treatments decreased, while those in L0N2-L2N2 and L0N3-L2N3 treatments showed trends of firstly increase and then decrease. Soluble protein and MDA contents in L0N0-L2N0 treatments decreased, while those in L0N1-L2N1, L0N2-L2N2 and L0N3-L2N3 treatments showed trends of firstly decrease and then increase. SOD activities in L0N0-L2N0 and L0N3-L2N3 treatments showed trends of firstly decrease and then increase, while those in L0N1-L2N1 and L0N2-L2N2 treatments de-creased. Dry weights and POD activities in different treatments showed trends of firstly increase and then de-crease. Membership function showed that growths of I. verum seedlings were optimal in L1N1 (72.8％NS, 200 mg/plant nitrogen) treatment.

light and nitrogen interactiongrowthphysiological characteristicIllicium verum seedling

陆华业、莫艺莛、郑绍鑫、王凌晖

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广西大学 林学院,广西南宁 530004

横州镇乡村建设综合服务中心,广西横州 530300

广西壮族自治区国有六万林场,广西玉林 537000

光氮互作 生长 生理特性 八角幼苗

广西壮族自治区林业科技项目

桂林科研[2014]11号

2024

10.19692/j.issn.1006-1126.20240202

广西林业科学
广西壮族自治区林业科学研究院

广西林业科学

CSTPCD
影响因子：0.59
ISSN：1006-1126
年,卷(期)：2024.53(2)
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