Abstract
Peach production in the U.S. relies on standard size trees on vigorous, seedling rootstocks grown at low-densities (<or= 297 trees/ha). Production per hectare is low. Peach tree growth habits, such as pillar (P) (columnar canopy shape) and upright (U), can be planted in high-density systems with the potential for increased production per hectare. Pillar and upright, advanced breeding selections, and standard (S) (‘Harrow Beauty’) trees on ‘Lovell’ rootstock were planted at 4 densities (135 trees/ha to 1112 trees/ha) and trained to a central leader (CL) or multiple leader (ML) form. Trees were dormant pruned and trained, then summer pruned (SP) in the first growing season after fall planting. One-half of the trees were SP in the second growing season after dormant pruning. Growth habit affected trunk and canopy size after two growing seasons. SP reduced canopy spread. Dormant CL training after one growing season required more time than ML training for all growth habits, however, the difference was greater for U and P trees (110% more time) than for S trees (39%). Branch spreading with training aids contributed to the greater training time for CL trees. Summer pruning increased light levels in the lower canopy with the greatest effect in S and U trees. Yields in the second leaf were greater for ML trained trees than CL trees. SP reduced the yield of U trees but not S or P trees. Based on these data and observations of U and P peach trees growing on a deep, well-drained fertile site, it appears that pruning and training of P and U trees to conform to a specific form may result in excessive tree vigor. Reduced early training to allow for expression of the natural growth habit may be preferable.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.