Acta Agriculturae Zhejiangensis ›› 2022, Vol. 34 ›› Issue (5): 1024-1031.DOI: 10.3969/j.issn.1004-1524.2022.05.17

• Horticultural Science • Previous Articles     Next Articles

Study on suitable ratio for bamboo sawdust and wheat bran composting as substrate of Stropharia rugosoannulata

WU Yifan1,2(), XIA Jie1, CHEN Sheng1, ZHANG Wei1, XIE Jinzhong1,*()   

  1. 1. Research Institute of Subtropical Forestry,Chinese Academy of Forestry, Hangzhou 311400, China
    2. College of Forestry, Nanjing Forestry University, Nanjing 210000, China
  • Received:2021-05-25 Online:2022-05-25 Published:2022-06-06
  • Contact: XIE Jinzhong

Abstract:

In order to explore the feasibility of substrate utilization of bamboo sawdust, wheat bran was mixed with bamboo sawdust for composting. According to the addition rate (mass fraction) of wheat bran, four treatments were set as CK 0, T1 4%, T2 8% and T3 16%. The changes of physiochemical properties before and after composting were studied, and the application potential of the composting product as cultivation substrate of Stropharia rugosoannulata was explored as well. It was shown that, the bulk density and electrical conductivity increased significantly (P<0.05) after composting under T1-T3 treatments, yet aeration porosity, the ratio of aeration porosity to water-holding porosity,cellulose and lignin content decreased significantly (P<0.05). When the addition rate was 0-8%, with increasing addition rate of wheat bran, the composting effect got better. But, when the addition rate of wheat bran was too high, the composting time would get longer. Under T2 treatment, the high temperature durationwas 10 d, the seed germination index of composting product reached 81.73%, and the mycelial growth potential of Stropharia rugosoannulata was the best, and the mycelial growth rate reached 0.394 mm·d-1. Thus, it was recommended to add 8% wheat bran into bamboo sawdust when composting,which would benefit for the composting, and the compost product could be used as the substrate for edible fungi with high C/N tolerance, such as Stropharia rugosoannulata.

Key words: bamboo sawdust, wheat bran, compost, substrate, Stropharia rugosoannulata

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