自毒作用(Autotoxicity)指植物通过地上部淋溶、根系分泌、植株残茬分解及气体挥发等途径释放的次生代谢产物过度积累而抑制下茬同种或同科植物生长的现象...
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...等酚酸类物质,当黄瓜连续种植时,根系分泌的酚酸类物质积累达到一定程度,就会抑制下茬黄瓜的生长,产生自毒作用(autotoxic effect)。自Mc Cord和Fridovich提出自由基伤害学说以来,现已广泛应用于研究需氧生物细胞的毒害机理。
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适应性自毒作用 adaptive autointoxication
There were manifold planting patterns of companion cropping and crop rotation such as alfalfa with cereal crops or with commercial crop. However, it was found that alfalfa had strong allelopthic effects on other crops and autotoxicity in practice.
但生产中发现，紫花苜蓿具有较强的化感作用和自毒作用。
参考来源 - 紫花苜蓿化感效应的研究For cucumber seedlings, the intensity of auto-toxic effect of exogenous phenolic acids under continuous cropping soil are higher than that of field soil under the same concentration. It shows the close relationship between continuous cropping obstacles and auto-toxic effect3.
2．相同浓度的外源酚酸对大棚土培黄瓜幼苗的自毒作用强度高于露地土培，说明连作障碍与自毒作用关系密切。
参考来源 - 外源酚酸对黄瓜自毒作用的生理生化机制研究Heizi) seedling is generally used as grafted material. However, grafted seedlings may avoid autotoxic effect of the cucumber root system, but the serious continuous cropping obstacles were occurred.
设施黄瓜栽培多以南瓜的嫁接苗为主,嫁接黄瓜虽然可以避免由黄瓜根系分泌物引起的自毒作用,但仍然能产生严重的连作障碍。
参考来源 - 不同品种南瓜化感作用机理研究·2,447,543篇论文数据，部分数据来源于NoteExpress
并分析了连作条件下，植物残体和根系分泌物产生的自毒作用。
The autotoxidity caused by plant survivor and root exudates under continuous cropping of v…
在此基础上，选用几种有机肥料进行了缓解西瓜自毒作用的研究。
Several organic fertilizer was used to study the watermelon autointoxication in a soil culture system.
植物根系分泌物中的酚酸已被鉴定出对植物产生自毒作用，并对根际微生物有重要影响。
The secretion from the roots of plant which have been verified to benefit for auto-toxic effect have serious effect on microorganism of rhizosphere.
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