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Chinese Agricultural Science Bulletin ›› 2025, Vol. 41 ›› Issue (19): 36-41.doi: 10.11924/j.issn.1000-6850.casb2025-0294

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Research on Regulation of Processing Pepper Seedling Growth by Lyophyllum decastes Residue Composite Substrate

WANG Jingjing(), ZHANG Zikun, LI Tengfei, CHANG Peipei, LI Hongjie, HAN Meimei, WANG Youping, ZHANG Hongyong()   

  1. Dezhou Academy of Agricultural Sciences, Dezhou, Shandong 253015
  • Received:2025-04-14 Revised:2025-05-21 Online:2025-07-05 Published:2025-07-10

Abstract:

To establish an environmentally friendly seedling substrate system, this study employed a mixture experimental design to systematically evaluate the growth-regulating effects of Lyophyllum decastes residue (LDR)-based composite substrates with varying ratios on processing pepper seedlings. By analyzing changes in substrate physicochemical properties, seedling growth metrics, biomass accumulation, and root morphology, LDR exhibited significantly superior nutrient content and pore structure compared to traditional peat. At the optimal ratio of peat: LDR: perlite=6:3:1, seedling leaf area, strong seedling index, and root activity increased by 17.32%, 13.11%, and 7.58%, respectively, compared with the control CK (peat: perlite=8:2). Fresh and dry weights of aboveground biomass rose by 26.44% and 14.47%, while total root length and root surface area expanded by 10.05% and 12.76%. Substituting 30% peat with LDR reduces costs while enhancing pepper seedling growth through root-shoot synergy.

Key words: Lyophyllum decastes residue, processing pepper, growth regulation, biomass, root morphology, strong seedling index, root activity, mixture experiment design, root-shoot synergy