Identification and Practical Application of Silicate-dissolving Bacteria

查看全文 作　　者：LIN Qi-mei, RAO Zheng-hua, SUN Yan-xing, YAO Jun and XING Li-jun( Department of Soil and Water Sciences , China Agricultural University, Beijing 100094 ;Institute of Plant Nutrition and Resources , Beijing Academy of Agricultural and Forestry Sciences, Beijing 100081 )

出　　处：《Agricultural Sciences in China》索引2002年第1卷第1期,共5页

摘　　要：Slime-forming bacteria were isolated from soils, rock surface and earthworm intestine, and their effects on dissolving silicate minerals and tomato growth were examined. One of the bacteria, Bacillus mucilaginosus RGBc13, had particularly strong ability to form slime and dissolve silicates. RGBc13 could also colonize and develop in both non-rhizosphere and rhizosphere soil. Total number of slime-forming bacteria increased from 2.9 × 103 cfu·g- 1and 8.4 × 103 cfu·g-1 to 9.6 × 106 cfu·g-1 and 6.0 × 107 cfu·g-1 in the non-rhizosphere and rhizosphere soils respectively. Potassium and phosphorus nutritional conditions in the rhizosphere were markedly improved through inoculation of this bacterium. Available K and P respectively increased from 25.86 and 3.63mg· kg-1 in the non-rhizosphere soil to 91.23 and 5.74mg· kg-1 in the rhizosphere soil. Tomato biomass increased by 125%, K and P uptakes were more than 150%, greater than the non- inoculation. Thus, there is a potential in applying RGBc13 for improving plant K and P nutrition. 关键词：Silicate-dissolving bacteria, Silicates, TOMATO

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Identification and Practical Application of Silicate-dissolving Bacteria

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