Subtropical Plant Science >

2022 , Vol. 51 >Issue 4: 264 - 271

DOI: https://doi.org/10.3969/j.issn.1009-7791.2022.04.004

Plant ecology, resources and taxonomy

Analysis of Soil Fertility and Heavy Metal Pollution of Urban Green Space in Huadu, Guangzhou

  • 赖武婷，马红岩，任雄业，朱自飘，卢秋艳，袁富坚，冼纳怀
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  • (1. Guangzhou Carbon Forest Co., Ltd, Guangzhou 510520, Guangdong China；2. Guangzhou Huadu District Landscaping Management Office, Guangzhou 510800, Guangdong China)

Received date: 2022-06-14

  Accepted date: 2022-07-29

  Online published: 2023-01-17

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Abstract

Based on the investigation of soil samples of urban green space in Huadu district of Guangzhou, the soil fertility and heavy metal pollution were analyzed and evaluated by using the nutrient grading standard of the second National Soil Census and Nemerow pollution index method. The results showed that the soil bulk density of green space in Huadu urban ranged from 1.25 g·cm–3 to 1.75 g·cm–3. The range of porosity was 30.81%–47.42%, and the pH was from 6.16 to 7.68. The contents of organic matter were below grade 4, and nitrogen and phosphorus were seriously deficient. In different types of green space, the heavy metal pollution of roadside green space soil was the most serious, followed by the green space on both sides of the main road; the pollution of As was the most serious in the study area, followed by Pb, not polluted by Zn, and Cu、Cd、Cr、Ni、Hg had different degrees of pollution. Correlation analysis showed that soil pH was significantly correlated with total potassium and alkali hydrolyzable nitrogen. Organic matter was significantly correlated with total nitrogen. Total nitrogen and total phosphorus were significantly positively correlated with alkali hydrolyzable nitrogen and available phosphorus, respectively. And total potassium was significantly negatively correlated with alkali hydrolyzable nitrogen. Among heavy metal elements, Cu was significantly correlated with Zn, Cr and Ni; Zn was significantly correlated with Cu, Pb, Cd, Cr and Ni; Pb was significantly correlated with Zn and Cd; and Cr was significantly correlated with Cu, Zn, Ni. As and Hg had no significant correlation with other heavy metals.

Key words： urban green space; soil nutrient; heavy metal pollution; evaluation

Cite this article

赖武婷，马红岩，任雄业，朱自飘，卢秋艳，袁富坚，冼纳怀 . Analysis of Soil Fertility and Heavy Metal Pollution of Urban Green Space in Huadu, Guangzhou[J]. Subtropical Plant Science, 2022 , 51(4) : 264 -271 . DOI: 10.3969/j.issn.1009-7791.2022.04.004

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