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植物研究 ›› 2022, Vol. 42 ›› Issue (1): 62-70.doi: 10.7525/j.issn.1673-5102.2022.01.007

• 研究报告 • 上一篇    下一篇

城市绿化带植被覆盖度对盐碱地土壤盐分的调节

彭晓莉1,3, 吴旺泽2(), 沈娟2, 成宏斌2, 贺江涛2   

  1. 1.甘肃公航旅建设集团有限公司,兰州 730000
    2.西北师范大学生命科学学院,兰州 730070
    3.兰州新区市政投资管理集团有限公司,兰州 730300
  • 收稿日期:2020-08-14 出版日期:2022-01-20 发布日期:2021-12-30
  • 通讯作者: 吴旺泽 E-mail:wangzew78@sina.cn
  • 作者简介:彭晓莉(1977—),女,博士,高级工程师,主要研究方向为城市生态系统及景观园艺。
  • 基金资助:
    国家自然科学基金(31860113);校企合作项目(50090033);西北师范大学青年教师科研能力提升计划(NWNU-LKQN-16-12)

Regulation of Soil Salinity by Vegetation Coverage in Urban Greenbelt Saline-alkali Land

Xiaoli Peng1,3, Wangze Wu2(), Juan Shen2, Hongbin Cheng2, Jiangtao He2   

  1. 1.Gansu HATG Construction Group Co. Ltd. ,Lanzhou 730000
    2.College of Life Sciences,Northwest Normal University,Lanzhou 730070
    3.Lanzhou New Area Municipal Investment Group Co. ,Ltd,Lanzhou 730300
  • Received:2020-08-14 Online:2022-01-20 Published:2021-12-30
  • Contact: Wangze Wu E-mail:wangzew78@sina.cn
  • About author:PENG Xiao-Li(1977—),female,Ph.D,senior engineer,interested in urban ecology and Landscape gardening.
  • Supported by:
    National Natural Science Foundation of China(31860113┫:School-enterprise Cooperation Projects┣50090033);Young Teachers’ Scientific Research Capacity Enhancement Program of NWNU(NWNU-LKQN-16-12)

摘要:

城市绿化带土壤盐渍化成为近年来城镇化发展亟待解决的环境问题,本试验系统研究兰州新区城市绿化带植被覆盖度和不同肥力措施对盐碱地盐分的调节。结果表明“七叶树(Aesculus chinensis Bunge)+花叶楸(Catalpa bungei C.)+四季玫瑰(Rosa rugosa Thunb.)”的景观组合Ⅱ,在有机肥添加微生物菌剂的处理下,一个生长季平均植被覆盖度高达70.06%,表土脱盐率能达到53.51%,而“裸地”对照仅分别为20.62%和5.46%。景观组合Ⅱ处理pH值和电导率分别下降了12.54%和63.83%,“裸地”仅下降了3.14%和12.28%。相关性分析(P<0.05)表明,植被覆盖度与土壤含盐量(r=-0.949)高度负相关,与土壤有机质(r=0.887)和全氮(r=0.853)高度正相关。本研究认为,通过增加绿化带植被覆盖度、改善土壤肥力能有效改良盐碱地土壤盐分。

关键词: 植被覆盖度, 城市绿化带, 土壤盐渍化, 景观组合, 脱盐率

Abstract:

Soil salinization was a global problem, which not only seriously affected agricultural production, and also greatly threatened landscape and urban planning projects. In present study, different landscape combinations and fertility measures were used to investigate the adjustable mechanism of the vegetation coverage to the urban green belt saline-alkali soil in the Lanzhou New District. The results showed that “Aesculus chinensis Bunge + Catalpa bungei C. + Rosa rugosa Thunb.” landscape combination Ⅱ, treated with organic fertilizer and microbial inoculants,the average vegetation coverage reached to 70.06% during a growth season. And the topsoil desalination rate could reach to 53.51%, while the "bare land" was only 20.62% and 5.46% respectively. The pH value and electrical conductivity of the landscape combination Ⅱ decreased by 12.54% and 63.83%, respectively, while the “bare land” only decreased by 3.14% and 12.28%. Correlation analysis(P<0.05) shown that vegetation coverage was highly negatively correlated with soil salinity(r= -0.949), but highly positively correlated with soil organic matter(r=0.887) and with total nitrogen(r=0.853) respectively. These results indicated that can effectively improve the salt content of saline-alkali soil in the Lanzhou New District, by increasing the vegetation coverage of the green belt and improving soil fertility.

Key words: vegetation coverage, urban green belt, soil salinization, landscape combinations, desalination rate

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