| 张国娟,魏永胜,赵泽茹.不同水分及钾水平对烟草根、茎水导特性的影响[J].干旱地区农业研究,2010,28(1):142~146 |
| 不同水分及钾水平对烟草根、茎水导特性的影响 |
| 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 |
| 中文关键词: 烟草 水分胁迫 钾水平 导水率 |
| 英文关键词:tobacco (Nicotiana tabacum L.) water stress potassium level hydraulic conductivity |
| 基金项目:西北农林科技大学青年科学基金（04ZM049，06ZR032） |
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| 中文摘要: |
| 通过室内砂培试验，控制钾素水平：低钾（K1）2.4 mmol/L，中钾（K2）5.4 mmol/L， 高钾（K3）9.9 mmol/L以及两个水分处理：充分供水
W1和水分胁迫W2，选择云烟89号为供试材料，测定了烟草生长后期株高、茎粗、根系干重、根系总吸收面积和活跃吸收面积以及根、茎导水率等指标，研究了不同处理对烟株根系、茎部水导特性的影响。结果表明：在烟株生长后期，水分对烟株株高、茎粗、根系活跃吸收面积以及根系导水率的作用大于钾；在水分充足条件下，适度施钾可以促进烟株生长，提高根和茎的水分传导能力，但烟株根系干重和根系总吸收面积在各个处理间差异并不显著。 |
| 英文摘要: |
| 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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