Changing watering practices to improve tomato plant health – Phys.org
A new study by the University of Guelph in Ontario has discovered that applying more water to tomato plants during periods of high atmospheric vapor pressure deficit (VPD) can lead to increased growth, improved photosynthesis, and a higher yield of marketable fruit. The study, published in the journal Horticulture Research, emphasizes the importance of adjusting watering practices in response to changing environmental conditions.
VPD, a key measure of the difference between the amount of water in the air and the amount that the air can hold, can significantly impact the growth and yield of plants. High VPD levels are common in the late spring and early summer months, particularly during warm, dry weather. When VPD levels are high, plants transpire more water to cool themselves, leading to dehydration, stunted growth, and reduced photosynthesis.
“Tomato plants are very sensitive to changes in atmospheric vapor pressure deficit, particularly when temperatures and sunlight levels are high,” explains lead researcher Dr. Andrew Taylor, a professor in the Department of Environmental Biology at the University of Guelph. “We wanted to find out if there was a way to minimize the negative effects of high VPD on plant growth and fruit production.”
The research team conducted an experiment in controlled greenhouse environments. They studied two groups of tomato plants, one with consistent watering throughout the growing season, and the other with increased water application during periods of high VPD. The results showed that the group receiving extra water during high VPD periods grew more vigorously and produced significantly larger fruits. This was likely due to a more efficient water balance and an enhanced photosynthetic rate.
“By increasing watering during high VPD periods, we could help plants maintain their water balance and reduce stress on their water transport system,” explains Dr. Taylor. “This resulted in more efficient photosynthesis and ultimately, larger fruit.”
This research has important implications for farmers and home gardeners, highlighting the need for adaptive watering practices in response to fluctuating environmental conditions. It suggests that increased water application during high VPD periods may be a key strategy for improving tomato plant health, productivity, and fruit quality.
“The results of our research indicate that adjusting watering practices is crucial for maximizing yields and optimizing the growth and productivity of tomato plants,” says Dr. Taylor. “These findings can be applied in various growing conditions, helping producers adapt to changes in climate and improve their sustainability practices.”
The study emphasizes the critical link between environmental factors and plant growth, providing insights for optimizing plant health and promoting sustainable agricultural practices. By tailoring watering practices to environmental conditions, farmers and home gardeners can improve the performance of tomato plants and ultimately, contribute to a more efficient and resilient agricultural system.
