Shandong Science ›› 2023, Vol. 36 ›› Issue (2): 50-58.doi: 10.3976/j.issn.1002-4026.2023.02.007

• Microbiology of Agriculture • Previous Articles     Next Articles

Screening,identification, and functional evaluation of low temperature degradation of straw Trichoderma

TAI Shaohua1(), HU Jindong2, WEI Shaowen3, HONG Bo4, WANG Xixin1, SUN Youmin1,*()   

  1. 1. School of Municipal and Environmental Engineering,Shandong Jianzhu University,Jinan 250101,China
    2. Shandong Provincial Key Laboratory of Applied Microbiology,Ecology Institute,Qilu University of Technology (Shandong Academy of Sciences), Jinan 250013,China
    3. Qingdao Agricultural Administrative Law Enforcement Branch,Qingdao 266073,China
    4. Agricultural and rural Bureau of Lanshan District, Linyi 276000,China
  • Received:2022-04-20 Online:2023-04-20 Published:2023-04-11

Abstract:

Because of low temperatures in northern China during winter, straw with low decomposition efficiency is directly returned to the field, making pathogen accumulation easy. To promote in-situ decomposition of straw and reduce the accumulation of pathogenic bacteria, a strain of Trichoderma, C47-3, which degrades straw at a low temperature, was obtained through low temperature culture combined with cellulase, hemicellulase, and laccase activity screening. The strain was inoculated in straw liquid medium, and the straw degradation rate was 22.28% after 15 days of cultivation at 15 ℃. Morphological observation and molecular biology analysis revealed that the strain was Trichoderma paratroviride. The Trichoderma strain C47-3 and its volatile substances inhibited the growth of eight pathogens, including Botryosphaeria dothidea, Rhizoctonia cerealis, and Botrytis cinerea, and the inhibition rate of Fusarium pseudograminearum was greater than 60%. The screened Trichoderma strain C47-3 can improve straw decomposition efficiency at low temperatures and has biocontrol potential, providing strain resources for the efficient utilization of corn straw after returning to the field in winter and the biological control of soil-borne diseases in northern China.

Key words: Trichoderma, low temperature, straw degradation, identification, bacteriostatic rate

CLC Number: 

  • S182