Screening and growth-promoting properties of jujube rhizosphere microorganism in Northern Shaanxi

doi:10.14088/j.cnki.issn0439-8114.2025.01.006

Abstract

Abstract: In order to provide reliable microbial resources for the research and development of jujube biological bacterial fertilizer industry in Northern Shaanxi Province, strains with growth-promoting properties were screened from rhizosphere microorganisms of jujube in Northern Shaanxi Province by selective medium, and their growth-promoting properties were preliminarily studied. The results showed that eight strains of potassium-solubilizing bacteria were obtained, and the potassium-solubilizing rate was 1.7%~2.8%.Among them, strain zyk-8 had the highest potassium-solubilizing ability. Eleven strains of phosphorus-solubilizing bacteria were obtained, and the phosphorus-solubilization rate was 1.77%~2.66%. Among them, the phosphorus-solubilizing rate of strain zyp-5 was the highest. Ten strains of producing siderophore were obtained, and the relative content of siderophore was 9.20%~47.85%. Among them, zyf-6 had the strongest ability to produce siderophore. Ten indoleacetic acid（IAA）-producing strains were screened, and IAA content in the fermentation broth was 4.50~20.56 mg/L. Among them, strain zyi-3 had the strongest ability to produce IAA. The selected strains had good growth promotion potential and could be used as effective strains to enhance soil fertility.

Key words: rhizosphere microorganisms of jujube, screen, growth-promoting properties, phosphate solubilization, potassium solubilization, siderophore, indoleacetic acid（IAA）, Northern Shaanxi

CLC Number:

S154.3

LIU Xin-rui, HUANG Jun-li, HE Xiao-long, LIU Yue-qin, GAO Xiao-peng. Screening and growth-promoting properties of jujube rhizosphere microorganism in Northern Shaanxi[J]. HUBEI AGRICULTURAL SCIENCES, 2025, 64(1): 35-38.

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