| 水曲柳苗木根系形态和解剖结构对不同氮浓度的反应 |
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| 引用本文： | 陈海波,卫星,王婧,王政权.水曲柳苗木根系形态和解剖结构对不同氮浓度的反应[J].林业科学,2010,46(2). |
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| 作者姓名： | 陈海波 卫星 王婧 王政权 |
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| 作者单位： | 东北林业大学林学院,哈尔滨,150040 |
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| 基金项目： | 国家自然科学基金重点资助项目(30130160);;博士学科点专项基金项目(20050225009) |
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| 摘 要： | 采用温室沙培方法,在不同氮浓度处理下,研究1年生水曲柳苗木整株根系和前3级根形态,以及前3级根形态与解剖结构的关系,探讨不同氮浓度导致细根形态变化的原因。结果表明:1)随着氮浓度的增加,整株根系的总面积、总长度和比根长增加,但是总的平均直径减小,前3级根也具有相同的变化规律。根表面积和比根长从低氮到高氮增加与直径和根长的变化有关。2)氮浓度引起直径和根长变化与解剖特征变化有密切关系。低氮条件下直径增加与横切面皮层细胞直径和皮层厚度的增加有关,而高氮条件下皮层细胞直径减小和皮层厚度缩窄有关。在纵切面上,根长度从低氮到高氮增加可能与细胞数量增加有关。研究结果对解释施肥导致细根形态变化原因具有重要意义。
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| 关 键 词： | 水曲柳 氮胁迫 细根形态 解剖结构 |
Morphological and Anatomical Responses of Fraxinus mandshurica Seedling Roots to Different Nitrogen Concentrations |
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| Chen Haibo,Wei Xing,Wang Jing,Wang Zhengquan.Morphological and Anatomical Responses of Fraxinus mandshurica Seedling Roots to Different Nitrogen Concentrations[J].Scientia Silvae Sinicae,2010,46(2). |
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| Authors: | Chen Haibo Wei Xing Wang Jing Wang Zhengquan |
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| Institution: | School of Forestry/a>;Northeast Forestry University Harbin 150040 |
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| Abstract: | Fine root morphology can affect root absorption of nutrients and water from soil,and the morphology is not only controlled by root structure,but also by exterior environments. In this paper,root morphology variation of Fraxinus mandshurica seedlings in response to nitrogen concentration was investigated with a potting sand-cultured experiment with three nitrogen (N) level in a greenhouse. The changes of morphology in both total roots and the first three order roots,and anatomical properties under different ... |
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| Keywords: | Fraxinus mandshurica nitrogen treatment root morphology root anatomy |
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