Cooler season good for apple growers and their fruit production, researchers conclude.
The results of the study by the University of Texas and the University of Southern California are published in the September 8, 2011 issue of the Proceedings of the Royal Society B.
In 2009, fruit growers from six states were asked to tell a random sample of their neighbors how much fruit they’d be harvesting from each tree of the same season. They rated each tree according to how well it did over a 30-year period.
“We wanted to see if we could improve crop yields by increasing water availability and tree canopy height in our environment,” said senior author Dr. J. Michael Caffey, a University of Texas food plant scientist. “By comparing apples grown in Texas with trees grown in California or in any other area, we expected apples to show some correlation.”
Caffey and his colleagues at Texas conducted three experiments to compare apples grown in Texas with fruit grown in neighboring areas, all located in the San Joaquin Valley in California. These studies were conducted over 30 years from 1989 to 2005, the year the fruits were collected. Each trial included an apples grown in Texas and an apples grown in another state. The trees of each tree had been individually selected using DNA barcoding.
All apples were planted in three separate growing zones between May and August and watered once every two to five weeks. The growing areas ranged from a distance of 10 to 50 feet. At all times throughout the growing season, the apples were carefully placed in pots placed outside their zones. During the growing season, the apples were planted into the ground. In a previous experiment, fruit trees were watered during all three CDC 철도청 카지노seasons.
The researchers found that the amount of water that the apples received significantly increased as their growing 보성출장안마zones expanded.
They also showed that when water availability was decreased, apples tended to suffer from high tree mortality.
Soaring trees were able to thrive under less water but that increased water availability also led to a reduction in the amount of fruit available.
Caffey and his team suggest that the changes to the trees, such as providing more water as trees grew taller, lead to greater fruit yield. Their findings are particularly important because it is not known whether climate change will result in a large decline in yields in most areas over the long 보성출장마사지term.
The researchers also found that trees that had more water were likely to recover faster from drought when that water was available.