Subtropical Plant Science >

2022 , Vol. 51 >Issue 5: 351 - 361

DOI: https://doi.org/10.3969/j.issn.1009-7791.2022.05.004

Plant ecology, resources and taxonomy

Effects of Combined Application of Nitrogen, Phosphorus and Potassium on the Growth Characteristics of Flue-cured Tobacco Seedlings

  • 雷 刚，廉 云，刘金亮
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  • (College of Tobacco Science, Guizhou University / Guizhou Key Laboratory for Tobacco Quality Research / Tobacco Science Research Center of Guizhou University, Guiyang 550025, Guizhou China)

Received date: 2022-08-15

  Accepted date: 2022-09-05

  Online published: 2023-01-17

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Abstract

The effects of nitrogen, phosphorus and potassium fertilizers and combined application on the growth of flue-cured tobacco seedlings were studied and the fertilization technology of flue-cured tobacco seedlings was optimized in this paper. Using floating seedlings of the new flue-cured tobacco cultivar Guiyan 202 as the test material, the effects of different fertilization treatments on the growth of flue-cured tobacco seedlings were studied by N, P2O5, K2O single-factor random block test and three-factor five-level quadratic regression almost orthogonal rotation combination test. The results showed that N, P2O5, K2O and their combined application treatments had significant effects on the growth indexes of flue-cured tobacco seedlings. However, the concentrations of P2O5 and K2O had no significant effects on the number of leaves; the higher N concentration, the more significant the effect on the leaf area of tobacco seedlings. The higher N concentration, the larger leaf area in the early stage of tobacco seedlings. While the concentrations of P2O5 and K2O had little effect on the leaf area, and with the growth of tobacco seedlings, the leaf area and the concentrations of P2O5 and K2O first increased and then decreased; Compared with the concentration of N, P2O5 and K2O, it first increased and then decreased. The reasonable ratios of N, P2O5 and K2O could improve the leaf number, stem diameter, seedling height and leaf area of flue-cured tobacco seedlings, and promote the growth of flue-cured tobacco seedlings. From the above growth indexes, the combination treatment of high nitrogen and medium phosphorus and potassium had the best effect in this experiment, when the concentrations of N, P2O5 and K2O in the nutrient solution were 10.50–12.00 mmol·L–1, 4.50–5.25 mmol·L–1 and 10.50 mmol·L–1, respectively.

Key words： flue-cured tobacco; nitrogen; phosphorus; potassium; growth characteristics

Cite this article

雷 刚，廉 云，刘金亮 . Effects of Combined Application of Nitrogen, Phosphorus and Potassium on the Growth Characteristics of Flue-cured Tobacco Seedlings[J]. Subtropical Plant Science, 2022 , 51(5) : 351 -361 . DOI: 10.3969/j.issn.1009-7791.2022.05.004

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