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落叶松四种根系分泌物对胡桃楸根系活力和菌根侵染率的影响

苏金豹1,王东亮2,杨立学3**   

  1. (1东北林业大学经济管理学院, 哈尔滨 150040; 2东北林业大学野生动物资源学院, 哈尔滨 150040; 3东北林业大学林学院, 哈尔滨 150040)
  • 出版日期:2013-10-10 发布日期:2013-10-10

Effects of four kinds of Larix gmelini root exudates on the root activity and mycorrhizal infection incidence of Juglans mandshurica.

SU Jin-bao1, WANG Dong-liang2, YANG Li-xue3**   

  1. (1College of Economics and Management, Northeast Forestry University, Harbin 150040, China; 2College of Wildlife Resources, Northeast Forestry University, Harbin 150040, China; 3School of Forestry, Northeast Forestry University, Harbin 150040, China)
  • Online:2013-10-10 Published:2013-10-10

摘要:

通过施加胡桃楸-落叶松混交林中4种落叶松根际和非根际浓度的根系分泌物,研究其对胡桃楸幼苗生长、根系活力和菌根侵染率的影响。盆栽试验结果表明:(1)施加根际浓度的处理中,2,4-二羟基苯甲酸和阿魏酸处理的根系活力和菌根侵染率与对照比分别提高33.5%、10.7%和6.8%、5.7%,而其余处理普遍降低了胡桃楸的根系活力和菌根侵染率。(2)施加非根际浓度的处理中,胡桃楸的根系活力和菌根侵染率变化程度较大,与对照相比增减不一。(3)2,4-二羟基苯甲酸的根际和非根际浓度对胡桃楸生长都具有促进作用。(4)胡桃楸根系活力、菌根侵染率与生物量之间相关系数分别为0.897、0.91、0.877和0.912、0.894、0.917,达到极显著相关,表明较高的根系活力和菌根侵染率能够促进胡桃楸的生长。
 

关键词: 腐解, 玉米秸秆, 冬小麦, 碳, 氮、磷、钾, 轮作

Abstract: A pot experiment was conducted to study the effects of applying four kinds of Larix gmelini rhizosphere and bulk concentration root exudates from a Juglans mandshuricaL. gmelini mixed plantation on the root activity and mycorrhizal infection incidence of J. mandshurica. In the treatments of applying rhizosphere concentration root exudates, 2,4-2 hydroxy benzoic acid and ferulic acid improved the J. mandshurica root activity and mycorrhizal infection incidence by 33.5% and 10.7%, and 6.8% and 5.7%, respectively, while the other treatments decreased the root activity and mycorrhizal infection incidence, as compared with the control. In the treatments of applying bulk concentration root exudates, the J. mandshurica root activity and mycorrhizal infection incidence had a greater change, being increased or decreased, as compared with the control. Both the rhizosphere and the bulk concentration 2,4-2 hydroxy benzoic acid promoted the growth of J. mandshurica. The correlation analysis showed that there existed significant correlations between J. mandshurica root activity, mycorrhizal infection incidence, and biomass, with the correlation coefficients being 0.897, 0.91 and 0.877, and 0.912, 0.894 and 0.917, respectively, indicating that higher root activity and mycorrhizal infection incidence promoted the growth of J. mandshurica.

Key words: winter wheat, maize straw, C, rotation, decomposition., N, P, K