Optimization of Intercropping Modes in Placodon grandiflorus

Area of Science:

• Agricultural Science
• Plant Physiology
• Medicinal Botany

Background:

• Intercropping is known to enhance plant growth, yield, and secondary metabolite accumulation.
• Platycodon grandiflorus (P. grandiflorus), a traditional Chinese medicinal herb, has limited research on intercropping practices.
• Optimizing intercropping systems is crucial for sustainable agriculture and traditional medicine production.

Purpose of the Study:

• To investigate the physiological and biochemical changes in P. grandiflorus during intercropping.
• To assess the impact of different intercropping crops on P. grandiflorus quality.
• To determine the optimal intercropping strategy for P. grandiflorus.

Main Methods:

• Field study using two-year-old P. grandiflorus seedlings.
• Intercropping treatments included monoculture (JG-JG) and various crop combinations (JG-NX, JG-FF, JG-SS, JG-YM, JG-GZ, JG-DD).
• Evaluated growth, physiological indicators, biochemical markers, and saponin accumulation at different growth stages.

Main Results:

• Intercropping with Zea mays (JG-YM), Glycine max (JG-DD), and Achyranthes bidentata (JG-NX) increased chlorophyll and antioxidant enzyme activity while decreasing MDA content.
• These treatments also enhanced biomass and osmoregulatory substance content.
• Intercropping with Zea mays (JG-YM) and Adenophora stricta (JG-SS) significantly improved P. grandiflorus quality, with JG-SS notably preserving high platycodin D levels.

Conclusions:

• Intercropping significantly influences the growth, physiology, and quality of P. grandiflorus.
• Zea mays and Adenophora stricta are identified as beneficial intercropping partners for P. grandiflorus.
• Findings provide a scientific basis for optimizing intercropping systems to enhance sustainable production of traditional Chinese medicine.