| Effect of different water and potassium levels on root and stem hydraulic conductivity of tobacco (Nicotiana tabacum L.) |
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| DOI：10.7606/j.issn.1000-7601.2010.01.26 |
| Key Words: tobacco (Nicotiana tabacum L.) water stress potassium level hydraulic conductivity |
| Author Name | Affiliation | | ZHANG Guojuan | College of Life Sciences, Northwest A&F University of, Yangling, Shaanxi 712100, China | | WEI Yongsheng | College of Life Sciences, Northwest A&F University of, Yangling, Shaanxi 712100, China | | ZHAO Zeru | College of Life Sciences, Northwest A&F University of, Yangling, Shaanxi 712100, China |
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| Abstract: |
| Under different water (50 mL/2d and 20 mL/2d) and potassium levels (2.4 mmol/L，5.4 mmol/L，9.9 mmol/L), Yun 89 tobacco (Nicotiana tabacum L.) was selected as an experimental material. The experiment was carried out in greenhouse to evaluate the total absorption area, active absorption area, active area and dry weight of tobacco root system, plant height, stem diameter, hydraulic conductivity of root and stem of tobacco. The results showed
that the role of water was more important than potassium for tobacco plant height, stem diameter, root active absorption area and hydraulic conductivity at later growth stages. Under normal water supply, potassium fertilizer can enhance root and stem hydraulic conductivity of tobacco. But there were not remarkable differences on dry weight and total absorption area of tobacco root system between these ways. |
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