| Effects of field capacity, nitrogen and topping time coupling on the quality, yield and production of flue-cured tobacco |
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| DOI：10.7606/j.issn.1000-7601.2017.05.28 |
| Key Words: coupling of field capacity nitrogen and topping time flue-cured tobacco the chemical composition quality yield production |
| Author Name | Affiliation | | WU Zheng-xiao | Agricultural College of Guizhou university, Guiyang, Guizhou 550025, China | | ZHANG Chong-yu | Agricultural College of Guizhou university, Guiyang, Guizhou 550025, China | | GAO Mei-ling | Agricultural College of Guizhou university, Guiyang, Guizhou 550025, China | | FENG Long | Agricultural College of Guizhou university, Guiyang, Guizhou 550025, China |
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| Abstract: |
| To explore the impact of field capacity, nitrogen and topping time coupling on quality, yield and production of flue-cured tobacco, a pot experiment was conducted with a completely randomized design, setting different field capacity (A1, A2, A3), nitrogen rates (B1, B2, B3) and topping time (C1, C2, C3), and the flue-cured tobacco safflower dakin yuan was used as material. The results showed that different field capacity, nitrogen rates and topping time had significant effects on tobacco chemical quality. Comprehensive score of chemical composition were the highest for the treatment with soil field capacity of 65%, nitrogen application rate of 5 kg·666.7 m-2, and topping time of 7 days after flowering. A substantial improvement of internal chemical coordination resulted in the availability of upper leaves of tobacco. The yield was 145.51 kg·666.7 m-2 under the optimal combination A2B3C1, while the optimal production combination was A2B2C2 with the value being 1 924.95 yuan·666.7 m-2. The coupling of water and nitrogen had a very significant impact on tobacco yield. The production increased as the comprehensive score of chemical composition increased. Therefore, the appropriate combination of field capacity, nitrogen rates and topping time would improve the chemical composition and intrinsic quality of the various parts of tobacco, increase the production of flue-cured tobacco. |
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