| 土壤逐渐干旱过程中磷酸钾对水曲柳生理指标的影响 |
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| 引用本文： | 肖云鹏,于洋,王晶英.土壤逐渐干旱过程中磷酸钾对水曲柳生理指标的影响[J].东北林业大学学报,2009,37(3). |
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| 作者姓名： | 肖云鹏 于洋 王晶英 |
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| 作者单位： | 东北林业大学,哈尔滨,150040 |
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| 基金项目： | 龙江省科技攻关项目，黑龙江省农垦总局项目 |
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| 摘 要： | 在模拟自然干旱条件下，对3年生盆栽水曲柳叶面喷施了3种浓度的磷酸钾溶液，测定了水曲柳叶片的电导率、叶水势及光合等生理指标。结果表明：随着土壤含水率的降低，相对电导率升高，叶水势（ψw）、光合速率（Pn）、蒸腾速率（EVAP）、水分利用效率（WUE）和气孔导度（Gs）等生理指标均有不同程度的下降；磷酸钾溶液的浓度为20mmol·L^-1时，可有效地缓解水分胁迫对水曲柳产生的不良影响，提高水曲柳的抗旱性。
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| 关 键 词： | 水曲柳 水分胁迫 叶面喷施 磷酸钾 生理指标 |
Effect of Potassium Phosphate on Physiological Indices of Fraxinus mandshurica under Simulated Natural Drought Stress |
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| Xiao Yunpeng,Yu Yang,Wang Jingying.Effect of Potassium Phosphate on Physiological Indices of Fraxinus mandshurica under Simulated Natural Drought Stress[J].Journal of Northeast Forestry University,2009,37(3). |
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| Authors: | Xiao Yunpeng Yu Yang Wang Jingying |
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| Institution: | Xiao Yunpeng,Yu Yang,Wang Jingying(School of Life Sciences,Northeast Forestry University,Harbin 150040,P.R.China) |
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| Abstract: | An experiment was conducted to study the relative conductivity,leaf water potential and photosynthetic characteristics of three-year-old Fraxinus mandshurica potted seedlings treated with different concentrations of potassium phosphate through simulating natural drought stress.Result showed that the relative conductivity increased,other physiological traits,including leaf water potential,photosynthetic rate,transpiration rate,water use efficiency and stomatal conductance,decreased in different degrees.20 mm... |
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| Keywords: | Fraxinus mandshurica Water stress Leaf spray Potassium phosphate Physiological indexes |
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