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根茎类药用植物连作障碍研究进展

Research Progress on Continuous Cropping Obstacle of Rhizome Medicinal Plants

  • 摘要: 在根茎类药用植物集约化种植中,长期连作引起的植株生长不良、产量下降和品质降低等连作障碍问题,已成为制约我国中药材产业发展的重要因素。为缓解根茎类药用植物的连作障碍,促进根茎类药用作物的产业发展,本文综述了根茎类药用植物连作障碍的成因,并概括总结了消除连作障碍的措施。根茎类药用植物连作障碍成因十分复杂,包括植物的化感作用、土壤理化性质恶化、土壤酶活性改变和土壤中致病菌增加等,这些因素单独作用或共同作用。目前常用的消减技术措施包括:筛选耐重茬抗病新品种、合理轮作间作、土壤强还原处理、土壤蒸汽消毒和施加生物炭等物理措施、使用氯化苦、威百亩、棉隆和噻唑膦等化学农药,以及利用微生物菌剂如芽孢杆菌、哈茨木霉和淡紫拟青霉等调节土壤微生物群落并抑制有害微生物等。其中,利用微生物菌剂消减连作障碍是近年来的研究热点之一,但由于连作障碍涉及根系、土壤和微生物等诸多因素,采取综合防控措施才能有效消减连作障碍。最后从选育抗病性强、耐连作的优质新品种、进一步探索适宜的轮作间作模式和提高病原菌拮抗微生物稳定性等方面,对我国根茎类药用植物连作障碍的研究方向进行了展望。

     

    Abstract: In the intensive cultivation of rhizome medicinal plants, the continuous cropping problems such as poor growth rate, declined yield and lower quality have become important factors restricting the development of traditional Chinese medicine industry. To reduce or eliminate the obstacles and promote the development of agriculture, we sum up the causes of obstacles in medicinal plants and control measures in this review. In general, rhizosphere autotoxin enrichments, soil fertility unbalance, changes in soil enzyme activity, and microbial community variation were considered to be the main factors of continuous cropping obstacles. The commonly used measures include developing new varieties with enhanced traits and disease resistance, intercropping, reductive soil disinfestation, steaming disinfection of soil, application of biochar to soil, use of pesticides and effective microorganisms, etc. Of these, using of effective microorganisms has become one of the hotspots to reduce or eliminate continuous cropping obstacles. However, the obstacles represent the integrated effects of various factors between plants and soil, the comprehensive strategies and measures were required. Finally, we propose future research trends and strategies to reduce or eliminate the obstacles from different views.

     

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