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- Title
土壤产气肠杆菌的解磷特性及其对毛竹 苗的促生作用.
- Authors
徐冰石; 陈伏生; 张林平; 杨 豆; 刘 仁; 张 扬
- Abstract
[Object] This study aims to investigate the phosphate-solubilizing characteristics of Enterobacter aerogenes and its growth-promoting effect on Phyllostachys edulis. [Methods] The effects of different carbon sources, nitrogen sources, and environmental factors on phosphate solubilizing ability of E. aerogenes were evaluated by culture method of shaking liquid. The effects of the strain on available nutrients, enzyme activities, total phosphorus contents of roots and leaves, and phosphorus fractions of leaves in rhizosphere soil of P. edulis were studied using pot experiment in greenhouse. [Results] E. aerogenes displayed the strongest phosphate-dissolving capacity on tricalcium phosphate when the initial pH was 5.5~6.5, the volume of liquid was 1/5 or 2/5, and salt ion concentration was 0 or 1.0 g·L−1. Carbon source was sucrose or glucose, and nitrogen source was ammonium sulfate. The average phosphate solubilization of E. aerogenes to Ca2(PO4)3 and CaHPO4 was 331.83 mg·L−1 and 345.91 mg·L−1, respectively. Compared with the control treatment, the rhizosphere soil available phosphorus, phosphatase, urease activities and leaf net photosynthetic rate increased by 50.9%, 20.6%, 21.0% and 42.0% in P. edulis seedlings inoculated with E. aerogenes. The ground diameter, seedling height, and biomass accumulation were higher by 31.0%, 23.5% and 44.5%, respectively. Total phosphorus contents of roots and nucleic acid phosphorus contents of leaves in P. edulis significantly increased while residual phosphorus contents in leaves significantly decreased. Total phosphorus, metabolic phosphorus, and sugar phosphorus contents in leaves were steady due to inoculating E. aerogenes. [Conclusion] E. aerogenes has potential to highly adapt to the environment and improves the growth of P. edulis seedlings via increasing root phosphorus absorption and leaf nucleic acid phosphorus accumulation. It is also a potential strain for the development of special biological fertilizer for bamboo forest in phosphorus deficient area of Southern hills and has a good application prospect.
- Subjects
ENTEROBACTER aerogenes; AMMONIUM sulfate; PHOTOSYNTHETIC rates; NUCLEIC acids; PHOSPHORUS in soils; BIOFERTILIZERS; RHIZOSPHERE
- Publication
Forest Research, 2022, Vol 35, Issue 3, p38
- ISSN
1001-1498
- Publication type
Article
- DOI
10.13275/j.cnki.lykxyj.2022.03.005