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水肥耦合对楸树苗木生长和养分状况的影响

烟亚萍 刘勇 贺国鑫 薛敦孟 李成

烟亚萍, 刘勇, 贺国鑫, 薛敦孟, 李成. 水肥耦合对楸树苗木生长和养分状况的影响[J]. 北京林业大学学报, 2018, 40(2): 58-67. doi: 10.13332/j.1000-1522.20170251
引用本文: 烟亚萍, 刘勇, 贺国鑫, 薛敦孟, 李成. 水肥耦合对楸树苗木生长和养分状况的影响[J]. 北京林业大学学报, 2018, 40(2): 58-67. doi: 10.13332/j.1000-1522.20170251
Yan Ya-ping, Liu Yong, He Guo-xin, Xue Dun-meng, Li Cheng. Coupling effects of water and fertilizer on seedling growth and nutrient status of Catalpa bungei[J]. Journal of Beijing Forestry University, 2018, 40(2): 58-67. doi: 10.13332/j.1000-1522.20170251
Citation: Yan Ya-ping, Liu Yong, He Guo-xin, Xue Dun-meng, Li Cheng. Coupling effects of water and fertilizer on seedling growth and nutrient status of Catalpa bungei[J]. Journal of Beijing Forestry University, 2018, 40(2): 58-67. doi: 10.13332/j.1000-1522.20170251

水肥耦合对楸树苗木生长和养分状况的影响

doi: 10.13332/j.1000-1522.20170251
基金项目: 

北京园林绿化落叶乔木优良品种选育及栽培技术 CEG-2015-01-01

2016年北京园林绿化增彩延绿植物资源收集、快繁与应用技术研究 CEG-2016-01

详细信息
    作者简介:

    烟亚萍。主要研究方向:森林培育。Email:yypyana@163.com 地址:100083北京市海淀区清华东路35号北京林业大学森林培育与保护教育部重点实验室

    责任作者:

    刘勇,教授,博士生导师。主要研究方向:森林培育。Email:lyong@bjfu.edu.cn 地址:同上

  • 中图分类号: S718.43

Coupling effects of water and fertilizer on seedling growth and nutrient status of Catalpa bungei

  • 摘要: 目的探究不同水肥条件下楸树苗木生长及养分状况,确定楸树苗木合理水肥管理措施。方法本文以楸树幼苗为试验材料,采用双因素完全随机试验,设置3个水分梯度(30%饱和持水量(FWC)、50%FWC、70%FWC),和4个施肥量(T1(氮0g,磷0g,钾0g)、T2(氮2g,磷1g,钾1.5g)、T3(氮4g,磷2g,钾3g)、T4(氮6g,磷3g,钾4.5g)),通过盆栽试验研究了不同水肥处理对楸树苗木生理生长的影响,并探讨了楸树苗木生长及养分吸收的关系。结果水肥耦合对楸树苗木的形态指标交互作用不显著,苗高、地径、生物量均随水分梯度的增加而降低,在水分梯度为30%FWC时最好;随施肥量的增加呈先增加后降低,均在T3处理达到峰值。苗木养分在T3处理时达到奢养状态,此时苗木的苗高、地径、生物量及养分含量最高,再增加施肥会对苗木产生毒害作用,即苗木养分质量分数还在增加但形态指标和养分含量已开始降低。水肥耦合对楸树苗木养分质量分数和养分含量有一定的交互作用,其养分含量均随施肥量的增加而增加,在T3处理处达到最大;在水分含量为30%FWC时,施肥对楸树苗木有较好的促进作用,T3、30%FWC处理更有利用苗木养分的吸收和利用。结论水分梯度和施肥量对苗木生长和养分状况的作用证实,水肥耦合对苗木的质量有一定的提升,30%的饱和持水量和T3处理(氮4g,磷2g,钾3g)结合对楸树苗木育苗效果最好。

     

  • 图  1  水肥耦合下楸树苗木苗高、地径、高径比

    FWC.饱和持水量; 不同小写字母表示不同处理之间差异显著(P < 0.05)。下同。

    Figure  1.  Interaction of water and fertilizer on height, collar diameter, and height to diameter ratio of Catalpa bungei seedlings

    FWC, saturated water content; different lowercase mean significant difference at P < 0.05 level between different treatments. The same below.

    图  2  水肥耦合下楸树苗木根茎生物量和总生物量

    Figure  2.  Interaction of water and fertilizer on stem biomass, root biomass and total biomass of Catalpa bungei seedlings

    图  3  水肥耦合下楸树苗木茎根养分质量分数

    Figure  3.  Interaction of water and fertilizer on nutrient mass concentration in stem and root of Catalpa bungei seedlings

    图  4  水肥耦合下楸树苗木茎根养分含量

    Figure  4.  Interaction of water and fertilizer on nutrient content in stem and root of Catalpa bungei seedlings

    图  5  水肥耦合下楸树苗木茎根养分利用率

    Figure  5.  Interaction of water and fertilizer on fertilizer use efficiency of Catalpa bungei seedlings

    表  1  水分梯度、施肥量及交互效应对苗高、地径、高径比和生物量影响

    Table  1.   Interaction of water and fertilizer on height, root collar diameter, height to diameter ratio and mass

    变异来源
    Variance source
    苗高
    Seedling height
    地径
    Collar diameter
    高径比
    Height to diameter
    茎生物量
    Stem biomass
    根生物量
    Root biomass
    总生物量
    Total biomass
    水分梯度
    Water content(WC)
    < 0.05 0.03 0.015 < 0.05 < 0.05 < 0.05
    施肥水平
    Fertilization level(FL)
    < 0.05 < 0.05 0.063 < 0.05 < 0.05 < 0.05
    水分梯度×施肥水平
    WC×FL
    0.158 0.061 0.270 0.744 0.812 0.987
    下载: 导出CSV

    表  2  水分梯度、施肥量及交互效应对楸树苗木氮、磷、钾质量分数影响

    Table  2.   Interaction of water and fertilizer on nutrient mass concentration in stem and root of Catalpa bungei seedlings

    变异来源
    Variance source
    氮 N 磷 P 钾 K
    茎 Stem 根 Root 茎 Stem 根 Root 茎 Stem 根 Root
    水分梯度 Water gradient(WG) < 0.05 < 0.05 0.789 0.076 0.334 0.512
    施肥水平 Fertilization level(FL) < 0.05 < 0.05 0.007 0.002 0.071 0.019
    水分梯度×施肥水平 WG×FL < 0.05 < 0.05 0.133 0.024 0.222 0.179
    下载: 导出CSV

    表  3  水分梯度、施肥量及交互效应对氮、磷、钾含量的影响

    Table  3.   Interaction of water and fertilizer on nutrient content in stem and root of Catalpa bungei seedlings

    变异来源
    Variance source
    氮 N 磷 P 钾 K
    茎 Stem 根 Root 茎 Stem 根 Root 茎 Stem 根 Root
    水分梯度 Water gradient(WG) < 0.05 < 0.05 < 0.05 < 0.05 < 0.05 < 0.05
    施肥水平 Fertilization level(FL) < 0.05 < 0.05 < 0.05 < 0.05 < 0.05 < 0.05
    水分梯度×施肥量 WG×FL 0.216 0.019 0.778 0.996 0.21 0.181
    下载: 导出CSV
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  • 收稿日期:  2017-07-19
  • 修回日期:  2017-11-21
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