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自毒作用是连作障碍的发生机制之一,该作用主要是由有机酸、醛类芳香酸、香豆素、醌类、生物碱和类萜等植物次生代谢产物及其分解产物所引起的。其作用机理包括增加细胞膜膜通透性、降低酶活性、抑制植物的养分吸收等。相应的矫治措施主要有合理施肥、施用微生物制剂、嫁接、轮作和间套作等。本文综述了自毒作用在连作障碍中的作用机制以及相应的矫治措施。
Autotoxicity is one of the mechanism of continuous cropping obstacle, which is mainly caused by the secondary metabolites of plant and its decomposition products, such as organic acids, aldehydes, aromatic acids, coumarins, quinones, alkaloids and terpenoids . Its mechanism of action includes increasing cell membrane permeability, reducing enzyme activity, inhibiting plant nutrient absorption. Corresponding corrective measures are mainly rational fertilization, application of microbial agents, grafting, rotation and intercropping and so on. This review summarizes the mechanism of autotoxic effects in continuous cropping disorders and the corresponding corrective measures.