Aerosol salt damage is the main problem of landscaping in the coastal areas of southern China

doi:10.13287/j.1001-9332.202108.035

Abstract

Abstract: Both the growth and survival of landscape plants are difficult due to the harsh natural conditions in coastal areas of southern China. Many plants suffer from symptoms of salt damage. Different from the damages by salt in the soil, the symptoms of windblown salt are damage to young shoots and leaves. Plants at the windward side are damaged more than the leeward side. These cha-racteristics imply that the damage is due to salt in aerosols instead of salt in the soil. To test this hypothesis, we measured plant growth, soil and climate factors in 24 frontline coastal counties and cities of China. The results showed that the first-line coastal plants showed strong symptoms of salt damage, especially in the Taiwan Strait area (85.4% belonged to desalinized soil), and that the damage level was highly correlated with wind speed. Our results confirmed that aerosol salt is the major cause of plant damage in the coastal areas of southern China. We constructed the first distribution map of salt damage along frontline coastal regions of southern China and proposed methods for diagnosing aerosol salt damage. Selecting and configuring aerosol salt-tolerant plants, greening engineering measures, and follow-up maintenance were suggested for improving the overall effect and level of landscaping in the coastal areas of southern China.

Key words: salt spray, salt damage, wind speed, plant growth, landscaping

CAO Jian-ting, FAN Zhi-yang, HUANG Jian-ming, CHEN Yang-fang, CHEN Zi-liang, WANG Wen-qing. Aerosol salt damage is the main problem of landscaping in the coastal areas of southern China[J]. Chinese Journal of Applied Ecology, 2021, 32(8): 2923-2930.

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