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草业学报 ›› 2014, Vol. 23 ›› Issue (3): 127-135.DOI: 10.11686/cyxb20140314

• 论文 • 上一篇    下一篇

污泥对高羊茅抗旱性的影响研究

韩朝,刘洋,董慧,常智慧*   

  1. 北京林业大学草坪研究所,北京 100083
  • 收稿日期:2013-08-27 出版日期:2014-06-20 发布日期:2014-06-20
  • 通讯作者: E-mail:changzh@bjfu.edu.cn
  • 作者简介:韩朝(1987-),男,河北石家庄人,在读硕士。E-mail:han_chao1988@126.com
  • 基金资助:
    北京高等学校“青年英才计划”项目(YETP0742)资助

Influences of biosolids on drought resistance of tall fescue

HAN Chao,LIU Yang,DONG Hui,CHANG Zhi-hui   

  1. Turf Institute of Beijing Forestry University, Beijing 100083, China
  • Received:2013-08-27 Online:2014-06-20 Published:2014-06-20

摘要: 污泥中含有腐殖质和生长素等生物活性类物质,会对植物的生长产生影响。本试验在相同氮肥条件下,研究了污泥对高羊茅抗旱性的影响。采用裂区实验设计,主处理包括充分浇水和干旱2个水平;副处理为不同的氮源:对照(75.0 mg/kg的氮素由硝酸铵提供)、半污泥(硝酸铵和污泥各提供37.5 mg/kg的氮素)、全污泥(75.0 mg/kg的氮素由污泥提供)。结果表明,干旱条件下全污泥和半污泥处理能够显著提高高羊茅的坪观质量、叶片相对含水量和叶绿素含量,并降低叶片萎蔫度(P<0.05),表明污泥的施用能够改善高羊茅在干旱下地上部分的生长状况;全污泥处理还能提高叶片的水分利用效率,使高羊茅在50%田间持水量时保持较好的水分代谢(P<0.05);全污泥和半污泥处理能够增加2种水分状况下的根重,提高高羊茅在重度干旱下的根系活力,同时促进干旱条件下高羊茅叶片中脯氨酸的积累(P<0.05),表明污泥中的活性物质能够增强高羊茅的抗旱性。

Abstract: Biosolids contain biologically active substances, such as humus and auxin, which will influence plant growth. The influences of biosolids on drought resistance of tall fescue (Festuca arundinacea) were studied at the same nitrogen level. Split-plot treatments included well-watered and drought stress. Subplot treatments all had nitrogen applied at 75 mg/kg. The control had 75 mg N/kg soil completely provided by NH4NO3 solution). The biosolids 0.5× rate had 37.5 mg N/kg soil provided by biosolids, and 37.5 mg N/kg soil provided by NH4NO3 solution. The biosolids 1× rate had 75 mg N/kg soil completely provided by biosolids). Nitrogen treatments at biosolids 1× and 0.5× rates improved turfgrass quality, leaf relative water content, leaf chlorophyll content, and reduced leaf wilting rate under drought stress (P<0.05) indicating that biosolids improved the aboveground growth condition of tall fescue under drought stress. Treatment with the biosolids 1× rate also increased leaf water use efficiency of tall fescue and maintained better water metabolism at 50% container capacity (P<0.05). Treatments at biosolids 1× and 0.5×rates increased root dry weight of tall fescue under both moisture conditions and improved root viability under severe drought stress. Proline accumulation was also promoted by bisolids under both water conditions (P<0.05). It is suggested that biologically active substances in biosolids can enhance drought tolerance of tall fescue.

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