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柳杉凋落物自毒作用研究
引用本文:俞飞,侯平,宋琦,郭明,吴俊.柳杉凋落物自毒作用研究[J].浙江农林大学学报,2010,27(4):494-500.
作者姓名:俞飞  侯平  宋琦  郭明  吴俊
作者单位:1.浙江农林大学 林业与生物技术学院,浙江 临安 311300;2.杭州万向职业技术学院 生物技术系,浙江 杭州 310023;3.浙江省金华市森林病虫防治站,浙江 金华 321017
摘    要:采用种子萌发法对浙江天目山柳杉Cryptomeria fortunei凋落物的自毒作用进行了研究,以探究这种凋落物的自毒作用对柳杉天然更新障碍的影响。结果表明,柳杉凋落物及其表层土壤浸提液在质量体积比为1 ∶ 10时,对柳杉种子萌发具有抑制作用。随着浸提液比例的降低(1 ∶ 100),抑制作用减弱,甚至消失(1 ∶ 250)。自毒作用强度为未分解凋落物>半分解凋落物>表层土壤。而且未分解凋落物浸提液的化感作用强度随着样品含水率的增大而增强。通过高效液相色谱仪测定发现,柳杉凋落物和表层土壤中均含有酚酸类化感物质阿魏酸、肉桂酸和对羟基苯甲酸,而且未分解凋落物中的这3种物质的含量均是最高的。综合推测,这3种化感物质主要来自于未分解的柳杉凋落物。图2表4参22

关 键 词:森林生物学    柳杉    凋落物    自毒作用    酚酸类物质    天然更新

Autotoxicity of Cryptomeria fortunei litter
YU Fei,HOU Ping,SONG Qi,GUO Ming,WU Jun.Autotoxicity of Cryptomeria fortunei litter[J].Journal of Zhejiang A&F University,2010,27(4):494-500.
Authors:YU Fei  HOU Ping  SONG Qi  GUO Ming  WU Jun
Institution:1.School of Forestry and Biotechnology,Zhejiang A & F University,Lin’an 311300,Zhejiang,China;2.Department of Biotechnology,Hangzhou Wanxiang Polytechnic,Hangzhou 310023,Zhengjiang,China;3.Jinhua Forest Diseases and Pests Control Station,Jinhua 321017,Zhejiang,China
Abstract:To determine the influence of autotoxicity on natural regeneration of Cryptomeria fortunei,seed germination in water extract of C. fortunei litter was researched with treatments of 1 ∶ 10,1 ∶ 100,1 ∶ 200,and 1 ∶ 250 (litter water extract volume: distilled water volume). Results showed that the high extract concentration(1 ∶ 10) restrained C. fortunei seed germination. Restraint intensity declined as the concentration decreased with a restraint intensity order of:undecomposed litter > semi-decomposed litter > soil. High performance liquid chromatograph(HPLC) was used to analyze autotoxins components of ferulic acid (FA),cinnamic acid (CA),and -hydroxybenzoic acid (-HA). Also,autotoxin content identified in undecomposed litter was greater than semi-decomposed litter and soil combined. Thus,undecomposed litter was the primary source of released autotoxins.[Ch,2 fig. 4 tab. 22 ref.]
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