Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2021, Vol. 37 ›› Issue (29): 1-6.doi: 10.11924/j.issn.1000-6850.casb2021-0179

Special Issue: 马铃薯 农业气象

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Five Biologicals: Effects on Seed-Tuber Sprouting, Plant Growth and Yield Traits Under Extreme Weather

Chun Jun(), Sang Youshun(), Feng Yan, Chen Tao, Li Qian   

  1. Chengdu Academy of Agricultural and Forestry Sciences, Chengdu 611130
  • Received:2021-02-25 Revised:2021-04-13 Online:2021-10-15 Published:2021-10-29
  • Contact: Sang Youshun E-mail:jamiechun123@163.com;cdkxgs@163.com

Abstract:

To meet the need of early-orderly-strong emergence of potato seedlings during season connection, the application of mechanized production technology and yield stability under adverse climatic conditions, ‘Favorita’was chosen as the test material, and five biologicals based on beneficial bacteria and engineering bacteria extracts were selected as the seed dressing, and the multiple characters of potato were analyzed. The five biologicals could promote the germination of seed tuber and the growth of both bud and root, advance seedling emergence for 2-7 days, and increase the emergence rate 49 days after sowing for 3.33%-17.78% compared with the control group. The best two are the ramification of yeast nucleotides and VDAL, whose effect on germination and root growth of seed tuber are significantly better than that of the control. The bio-agent dressing could accelerate the recovery of plants as well as the development of tubers after frost, with a yield-increasing of 8.39%-24.03% than that of the control, showing different levels of yield-stability effect. Four biologicals including Duomadaohe, ramification of yeast nucleotides, Gentai and VDAL are beneficial in stable production after frost and drought, and could be selected as seed tuber dressing in potato cultivation.

Key words: potato, seed tuber dressing, biological, seedling emergence, extreme weather

CLC Number: