Wildfire season has begun in many places around the world. The dangerous smoke wildfires produce can spread far and wide. It blocks sunlight, poisons the air and damages the health of people and other living things.
Some of those living things could be the plants in gardens, says gardening expert Jessica Damiano, who writes gardening stories for the Associated Press. Damiano lives in New York City and recently experienced several days of very smoky air. Wildfires in eastern Canada were the source.
Damiano, like other people, limited the time she spent outdoors when the air quality was poor. She also wore a face covering when she had to go outside.
But the plants in her garden had no such escape. They had to breathe the poisoned air through the extremely small holes in their leaves.
Pollutants in smoke landing on plants can block sunlight, which is essential for photosynthesis (光合作用). Reduced photosynthesis results in reduced energy. That means slower growth. Additionally, smoke can also affect a plant's ability to take in nutrients(营养物质).
Brooke Edmunds, a plant scientist and community horticulturalist with Oregon State University Extension, said plants that are affected by smoke for a short amount of time will usually recover quickly."It depends on how close they are," she said. "There could also be a localized effect, where one garden is covered in ash(灰烬), and a half-mile away, there's nothing because that's the way the wind was moving things around."
The best thing home gardeners can do is keep an eye on plants. Edmunds suggests giving plants some extra love and care. "Wash the plants gently to remove pollutants left by smoke. Then give them a long, slow drink of water. Most will pull through," Edmunds said. However, people should not use leaf blower machines to remove ashes from plants because they will risk breathing in what is blowing around.
