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  

Effects of four kinds of Larix gmelini root exudates on the root activity and mycorrhizal in fection incidence of Juglans mandshurica

作　　者：苏金豹[1] 王东亮[2] 杨立学[3] 

机构地区：[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　　处：《生态学杂志》2013年第10期2659-2664,共6页Chinese Journal of Ecology

基　　金：国家自然科学基金项目(31070385)资助

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。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 mandshuricaL. 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.

关 键 词：2 4-二羟基苯甲酸 7-羟基香豆素 阿魏酸 松香酸 

分 类 号：S792.132[农业科学—林木遗传育种]