| 杉木化感物质香草醛的产生机理探讨 |
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| 引用本文： | 何光训.杉木化感物质香草醛的产生机理探讨[J].浙江林学院学报,2005,22(4):454-457. |
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| 作者姓名： | 何光训 |
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| 作者单位： | 浙江林学院,林业与生物技术学院,浙江,临安,311300 |
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| 摘 要： | 杉木Cunninghamia lanceolata连栽可导致生产力逐代退化.退化的重要原因是土壤中化感物质香草醛积累.这种化感物质是在林地土壤中缺氮情况下由于前体物和能量流向次生物质而合成,故林地土壤毒性是随着杉木林地土壤肥力(如氮)的逐代降低而增强.无论从消除毒性的土壤生物化学--土壤腐殖质形成,还是从产生毒性物质的生态生物化学--化感物质形成,都从理论上证明,缺氮是制约这2种生物化学过程进行的关键因素.另外,杉阔混交林中的阔叶树的作用在于补充纯杉木林地中缺乏的氮,这可由杉木生长正常、无毒害现象发生以及腐殖质含量增加佐证.退化点和作用点相一致.图1参23
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| 关 键 词： | 化感作用 香草醛 杉木 生态生物化学 氮素 |
| 文章编号： | 1000-5692（2005）04-0454-04 |
| 收稿时间： | 2004-11-11 |
| 修稿时间： | 2004-11-112005-01-10 |
Generation mechanism of vanillin in Cunninghamia lanceolata |
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| HE Guang-xun.Generation mechanism of vanillin in Cunninghamia lanceolata[J].Journal of Zhejiang Forestry College,2005,22(4):454-457. |
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| Authors: | HE Guang-xun |
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| Abstract: | Chinese fir(Cunninghamia lanceolata) is a fast-growing tree species in the south forest area of China.Planting Chinese firs in succession can result in the degeneration of soil fertility,caused by the accumulation of vanillin in soil.When forest soil is short of nitrogen,the precursor and the energy directly flow down into the combination of sub-metabolites,and soil toxicity will strengthen with the decrease of soil fertility.The generation of the biochemical soil humus can reduce poison.The generation of eco-chemical allelopathic substances can produce poison.Both of them theoretically demonstrate that shortness of nitrogen is a critical factor affecting the two biochemistry processes.Furthermore,the broad-leaved trees in the mixed forest of Chinese firs and broad-leaved trees can supply nitrogen ,which can be proved by the normal growth of Chinese fir,no incidence of toxicity and and the increase in the content of humus in soil.The degeneration point of soil fertility in pure Chinese fir planted in succession is identical with the action point of broad-leaved trees in mixed forest of Chinese fir and broad-leaved tree.Ch,1 fig.23 ref.] |
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| Keywords: | allelopathy vanillin Chinese fir(()Cunninghamia lanceolata) ecological biochemistry nitrogen |
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