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草业学报 ›› 2021, Vol. 30 ›› Issue (3): 167-176.DOI: 10.11686/cyxb2020098

• 研究论文 • 上一篇    下一篇

干旱胁迫下污泥对草地早熟禾生长及激素代谢的影响

张宁(), 曹允馨, 徐伟, 常智慧()   

  1. 北京林业大学草业与草原学院,北京 100083
  • 收稿日期:2020-03-07 修回日期:2020-09-09 出版日期:2021-03-20 发布日期:2021-03-09
  • 通讯作者: 常智慧
  • 作者简介:Corresponding author. E-mail: changzh@bjfu.edu.cn
    张宁(1996-),女,山西运城人,在读硕士。E-mail: 18482109297@163.com
  • 基金资助:
    国家重点研发计划课题—秸秆基料化综合利用技术及标准研究(2018YFF0213502)

Effects of biosolids on the growth and auxin metabolism of Poa pratensis under drought stress

Ning ZHANG(), Yun-xin CAO, Wei XU, Zhi-hui CAHNG()   

  1. College of Grassland Science,Beijing Forestry University,Beijing 100083,China
  • Received:2020-03-07 Revised:2020-09-09 Online:2021-03-20 Published:2021-03-09
  • Contact: Zhi-hui CAHNG

摘要:

污泥可用作土壤改良剂和生物肥料,改善绿地土壤的理化性质,促进植物的生长。在相同供氮水平和两种水分条件下,采用裂区设计(主处理:干旱胁迫和充分浇水;副处理:吲哚丁酸、污泥、添加色氨酸的污泥、色氨酸和空白对照),探索污泥对草地早熟禾生长及其激素代谢的影响。研究结果表明,干旱胁迫下,污泥能显著提高草坪坪观质量以及叶绿素、类胡萝卜素含量,促进其光合作用(P<0.05)。干旱胁迫下,污泥和色氨酸均能提高草地早熟禾根系的色氨酸及吲哚乙酸含量;污泥可以显著提高草地早熟禾根系和叶片中的吲哚乙酸及色氨酸含量,且施用添加色氨酸的污泥比单独施用污泥的影响更显著(P<0.05)。试验表明施用污泥能显著促进草坪草的生长,干旱胁迫下可提高草地早熟禾光合速率;施用污泥也可以增加草地早熟禾叶片、根系中色氨酸及吲哚乙酸的含量。

关键词: 污泥, 草地早熟禾, 生长素, 干旱

Abstract:

Biosolids can improve the physical and chemical properties of soil, and promote plant growth. The aim of this research was to study the effects of biosolids on the growth and auxin metabolism of Poa pratensis. A split-plot experiment under the same nitrogen supply level and different water regimes was used, with the main-plot treatments being drought stress and sufficient water supply. The split-plot treatments were biosolids and hormone treatments, namely: indole-3-butytric acid, biosolids, biosolids with added tryptophan, tryptophan and a blank control with no additions. The results showed that biosolids significantly reduced damage to turf quality and ameliorated reductions in chlorophyll and carotenoid content of leaves (P<0.05). Under different water conditions, both the biosolids and tryptophan increased the content of tryptophan and indoleacetic acid in the roots, while the biosolids significantly increased indoleacetic acid and tryptophan levels in the root system and leaves, and biosolids mixed with tryptophan was more effective than biosolids alone (P<0.05). In summary, the application of biosolids significantly promoted turfgrass growth, increased the chlorophyll and carotenoid content of Kentucky bluegrass leaves under drought stress. Application of biosolids can also increased the content of tryptophan and indoleacetic acid in the leaves and roots, and increased the photosynthetic rate of P. pratensis and enhanced its drought resistance.

Key words: biosolids, Poa pratensis, IAA, drought