| Effects of different growth\|promoting microbial agents on soil biological characteristics of Lycium barbarum cultivated in Qaidam |
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| DOI：10.7606/j.issn.1000-7601.2025.01.26 |
| Key Words: Lycium barbarum microbial growth\|promoting bacteria biological characteristics of rhizosphere soil growth characteristics Qaidam |
| Author Name | Affiliation | | BAO Shancun | College of Agriculture and Animal Husbandry， Qinghai University， Xining, Qinghai 810016, China； College of Agriculture and Forestry Sciences，Qinghai University， Xining, Qinghai 810016, China | | LV Liangyu | College of Agriculture and Animal Husbandry， Qinghai University， Xining, Qinghai 810016, China； College of Agriculture and Forestry Sciences，Qinghai University， Xining, Qinghai 810016, China | | LONG Qichen | College of Agriculture and Animal Husbandry， Qinghai University， Xining, Qinghai 810016, China； College of Agriculture and Forestry Sciences，Qinghai University， Xining, Qinghai 810016, China | | FAN Guanghui | College of Agriculture and Forestry Sciences，Qinghai University， Xining, Qinghai 810016, China； Forest Genetics and Breeding Laboratory of Qinghai Plateau， Xining, Qinghai 810016, China |
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| Abstract: |
| The purpose of this study was to explore the effects of organic manure combined with growth\|promoting microbial inoculum on the growth and soil properties of organic Lycium barbarum cultivated on high ridges in Qaidam area. ‘Ningqi No.7-8’ in Nomuhong experimental area was used as the experimental material. Organic manure was added to the facility as the control (CK), and four different growth\|promoting microbial agents, namely Trichoderma harzianum, Bacillus subtilis, Bacillus amyloliquefaciens and Bacillus mucilaginosus, were applied to the organic Lycium barbarum. The effects of different treatments on the growth and soil properties of organic Lycium barbarum were compared. The results indicated that, compared to the control (CK), the application of organic manure combined with growth\|promoting microbial agents inordinately enhanced the tree height, ground diameter, SPAD value, root activity, and net photosynthetic rate (Pn) of Lycium barbarum L.. Notably, the treatment with Bacillus subtilis yielded the most significant improvements in plant height, root activity, Pn, and yield per plant, with increases of 13.4%, 46.7%, 37.1%, and 36.3%, respectively. Different microbial agent treatments significantly reduced soil pH, electrical conductivity, and microbial C/N ratio. The effect was the most obvious under Bacillus subtilis treatment, which was 9.0%, 51.9%, and 45.3% lower than CK, respectively. Different treatments also significantly improved soil organic matter, available nutrients, soil enzyme activity and soil microbial population. Under Bacillus subtilis treatment, soil organic matter and alkali\|hydrolysable nitrogen increased by 26.3% and 9.8% compared with CK, and soil urease activity and total microbial population increased by 35.7% and 26.6% respectively. Through the principal component analysis of soil biological characteristics, it is concluded that organic fertilizer combined with Bacillus subtilis treatment has the best effects on promoting the fertility level of organic Lycium barbarum cultivated soil in Qaidam. |
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