Early tree growth and cropping of high-density apple trees are influenced by a number of factors, including rootstock genotype , initial tree caliper, initial number of lateral branches (feathers), water supply, mineral nutrient reserves in the plant, and crop load.. With modern high-density plantings, which require high initial investment, it is expected that trees will grow sufficiently to fill the allotted space in the first 2 to 3 years while at the same time beginning fruit production in the second year to recoup the investment costs as quickly as possible..
The first study examines the impact of irrigation and fertigation on young apple trees in a humid environment, highlighting how these practices improve early tree growth and fruit yield. Researchers found that precise water and nutrient management through fertigation significantly enhances tree vigor, ensuring stronger establishment in the critical early years of orchard development. This research underscores the importance of tailored irrigation strategies for maximizing production efficiency in high-density plantings.
The second study investigates how the number and angle of lateral branches influence tree architecture, growth, and yield in high-density apple systems. Findings indicate that optimizing lateral branch structure can improve light interception, fruit distribution, and overall orchard performance. Understanding these factors allows growers to refine pruning and training techniques to enhance early yield potential while maintaining tree balance and long-term productivity.
Together, these studies contribute to the advancement of high-density apple orchard management, providing actionable insights for growers seeking to improve early tree performance and fruit production. The research supports more efficient and sustainable apple cultivation practices, helping orchardists maximize yields in diverse growing conditions.
The full article can be found on the ASHS HortTechnology electronic journal website at:
https://doi.org/10.21273/HORTTECH05497-24 and https://doi.org/10.21273/HORTTECH05571-24
Established in 1903, the American Society for Horticultural Science is recognized around the world as one of the most respected and influential professional societies for horticultural scientists. ASHS is committed to promoting and encouraging national and international interest in scientific research and education in all branches of horticulture.
Comprised of thousands of members worldwide, ASHS represents a broad cross-section of the horticultural community - scientists, educators, students, landscape and turf managers, government, extension agents and industry professionals. ASHS members focus on practices and problems in horticulture: breeding, propagation, production and management, harvesting, handling and storage, processing, marketing and use of horticultural plants and products. To learn more, visit ashs.org.
