首页|氮、镁交互作用对杉木幼苗生长和生理特性的影响

氮、镁交互作用对杉木幼苗生长和生理特性的影响

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  • 国家科技期刊平台
  • NETL
  • NSTL
  • 万方数据
  • 维普
[目的]探究氮、镁交互作用对杉木幼苗生长和生理特性的影响，确定适合杉木幼苗生长的氮、镁用量。[方法]以1 年生杉木品种'青杉'幼苗为材料，采用盆栽法，设置氮三因素[0(N0)、1。2(N1)、2。4(N2)g·株-1]、镁三水平[0(M0)、0。64(M1)、1。28(M2)g·株-1]共9 个处理，分别于施肥后的30、60、90、120、150、180 d测定各处理杉木幼苗的苗高、地径、叶绿素含量、可溶性蛋白含量、丙二醛(MDA)浓度、超氧化物歧化酶(SOD)活性、过氧化物酶(POD)活性和过氧化氢酶(CAT)活性等指标。[结果](1)整个试验期间，杉木幼苗的苗高、地径增长量随着氮、镁用量的增加呈先上升后下降的趋势，N1 M1处理的苗高、地径增长量显著大于N0 M0 处理(P＜0。05)。(2)整个试验期间，随着氮、镁用量的增加，叶绿素含量整体呈先下降后上升的趋势，可溶性蛋白含量整体呈先上升后逐渐趋于稳定的趋势，MDA浓度、SOD活性整体呈先上升后下降的趋势，POD活性、CAT活性整体呈先下降后上升的趋势。(3)整个试验期间，N1M1 处理的叶绿素含量显著大于N0 M0 处理(P＜0。05);N1M1 处理的 MDA 浓度在多数情况下最低;N1 M1 处理的 POD 活性显著大于 N0 M0 处理(P＜0。05)，且大于N2 M1、N1 M2、N2 M2 处理;处理 60～150 d时，SOD活性整体变化较平稳，N1M1 处理的CAT活性大于N0 M0 处理。[结论]氮、镁交互作用处理N1 M1 可降低细胞膜的损害程度，提高细胞渗透调节能力，增强细胞抗氧化酶活性，促进杉木幼苗生长发育。
The effect of nitrogen and magnesium interaction on the growth and physiological characteristics of fir seedlings
[Objective]The effect of nitrogen and magnesium interaction on the growth and physiological characteristics of fir seed-lings were investigated to work out the application rate of nitrogen and magnesium for fir seedlings.[Method]Three rates of nitrogen[0(N0),1.2(N1)and 2.4(N2)g·plant-1]and 3 rates of magnesium[0(M0),0.64(M1)and 1.28(M2)g·plant-1]were applied on 1-year-old Chinese fir variety of Cunninghamia lanceolata cv.Glauce′seedlings via factorial design by pot experiment,and indicators on growth(seedling height and ground diameter)and physiological characteristics contents of chlorophyll,soluble protein and malondialdehyde(MDA),superoxide dismutase(SOD)activity,peroxidase(POD)activity and catalase(CAT)ac-tivity were determined at 30,60,90,120,150 and 180 d after fertilization,respectively.[Result](1)The growth of seedling height and ground diameter firstly rose and then declined with the increase of N and Mg dosage,and the significantly higher growth was achieved under N1 M1 treatment in comparison to the performance under N0 M0(P＜0.05).(2)With the increase of N and Mg dosage,the overall chlorophyll content,POD and CAT activity decreased first and then increased,while the MDA concentration and SOD activity showed the opposite trend of firstly up and then down,and soluble protein contents rose first and then gradually stabi-lized.(3)During the entire trial,the chlorophyll content under N1 M1 treatment was significantly higher than that under N0 M0 treat-ment(P＜0.05),accompanied by the lowest MDA concentration most of the time;the POD activity under N1 M1 treatment was sig-nificantly greater than that under N0 M0(P＜0.05),and greater than N2 M1,N1 M2 and N2 M2 treatment;during 60-150 d,the SOD activity was mostly stable under N1 M1 treatment,together with higher CAT activity in comparison to that under N0 M0 treatment.[Result]The interaction of nitrogen-magnesium under N1 M1 treatment can alleviate the damage of cell membranes,improve the reg-ulation of cell penetration,and enhance the activity of cell antioxidant enzymes,leading to the enhanced growth and development of fir seedlings.

Cunninghamia lanceolatanitrogen and magnesium interactionantioxidant enzymesgrowth characteristicsphysio-logical characteristics

孟芳芳、关恒锋、杨浩、许祖元、左晓东、曹光球、曹世江

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福建农林大学林学院/国家林业和草原局杉木工程技术研究中心/福建农林大学林木逆境生理生态及分子生物学福建省高校重点实验室,福建 福州 350002

杉木 氮、镁交互 抗氧化酶 生长特性 生理特性

2025

10.13323/j.cnki.j.fafu(nat.sci.).202401017

福建农林大学学报(自然科学版)
福建农林大学

福建农林大学学报(自然科学版)

北大核心
影响因子：0.582
ISSN：1671-5470
年,卷(期)：2025.54(1)