关键词: 烤烟, 光合生理特性, 土壤微生物, 复合生物有机肥

Abstract: In order to explore the effects of compound bio-organic fertilizer mixed with Bacillus subtillis and EM bacteria upon flue-cured tobacco photosynthetic physiological characters & soil microbes, this paper analyzed growth and development, photosynthetic physiological characteristics, economic characters index, chemical compound usable index (CCUI), and soil microbes of flue-cured tobacco 7 d after topping, through comparing the different combined application of this compound bio-organic fertilizer with single chemical fertilizer. The results indicated that the net photosynthetic rate, high-class tobacco rate, average price, yield and value of yield of the compound bio-organic and tobacco economic character index (ECI) were increased by 15.0%~18.1%, 6.84%~9.50%, 2.86%~3.70%, 991%~11.90% and 13.0%~16.0%, respectively, compared with the single chemical fertilizer treatment. The usable index (CCUI) of B2F & C3F were increased by 5.78%~6.06% and 3.54%~5.28%, respectively, compared with the single chemical fertilizer treatment. And the total amount of 3 microbes, soil-bacteria, fungus and actinomycetes was significantly higher than that by the single chemical fertilizer treatment. This study  revealed  effect of bio-organic fertilizer application on soil of southern China tobacco/rice rotation regions, where soil fertility was decreased, damages by soil-born diseases became serious, and tobacco yield and quality were all deteriorated owing to the long-term chemical fertilizer application. This paper provided new technical measures for improving soil, where flue-cured tobacco was planted.

Key words: flue-cured tobacco, photosynthetic physiological characteristics, soil microorganism, compound bio-organic fertilizer