BACKGROUND: Nitrogen is a key component of crop production and is commonly related to increases in yield and fruit size. The N fertilization rates used for low-chill peach cultivars were adapted from other peach production regions, where environmental and soil conditions are different. The growth and production as well as the effect on fruit physical and compositional attributes of two low-chill peach cultivars - 'TropicBeauty' (TB) and 'UFSharp' (UFS) - with five different N fertilization rates (0 (N0), 45 (N1), 90 (N2), 179 (N3) and 269 (N4) kg ha-1 applied each year from 2011 to 2017) were examined. RESULTS: Peach trees under higher N rates had higher pruning weights compared to the lower N0 or N1 rates. Yield was only affected in 2017 for the two cultivars tested. Physical attributes were inconsistently affected by N. Fruit from the higher N rates had lower a* value (more green) than fruit from the trees under low or zero N. While fruit firmness was not affected by N, fruit from trees under zero/low N had higher total soluble solids in some years. CONCLUSION: Considering that N is recycled in the trees, being retained and reused each season to resume growth, it is important to address peach orchard fertilization based on peach tree N status. The results of this experiment show that an increase in N beyond what is required for tree maintenance does not increase yield. In addition, reducing N does not strongly affect fruit quality, although the color and soluble solids results suggest that lower N rates may advance fruit maturation.
BACKGROUND:Nitrogen is a key component of crop production and is commonly related to increases in yield and fruit size. The N fertilization rates used for low-chill peach cultivars were adapted from other peach production regions, where environmental and soil conditions are different. The growth and production as well as the effect on fruit physical and compositional attributes of two low-chill peach cultivars - 'TropicBeauty' (TB) and 'UFSharp' (UFS) - with five different N fertilization rates (0 (N0), 45 (N1), 90 (N2), 179 (N3) and 269 (N4) kg ha-1 applied each year from 2011 to 2017) were examined. RESULTS:Peach trees under higher N rates had higher pruning weights compared to the lower N0 or N1 rates. Yield was only affected in 2017 for the two cultivars tested. Physical attributes were inconsistently affected by N. Fruit from the higher N rates had lower a* value (more green) than fruit from the trees under low or zero N. While fruit firmness was not affected by N, fruit from trees under zero/low N had higher total soluble solids in some years. CONCLUSION: Considering that N is recycled in the trees, being retained and reused each season to resume growth, it is important to address peach orchard fertilization based on peach tree N status. The results of this experiment show that an increase in N beyond what is required for tree maintenance does not increase yield. In addition, reducing N does not strongly affect fruit quality, although the color and soluble solids results suggest that lower N rates may advance fruit maturation.
Authors: Tong Qiu; Robert Andrus; Marie-Claire Aravena; Davide Ascoli; Yves Bergeron; Roberta Berretti; Daniel Berveiller; Michal Bogdziewicz; Thomas Boivin; Raul Bonal; Don C Bragg; Thomas Caignard; Rafael Calama; J Julio Camarero; Chia-Hao Chang-Yang; Natalie L Cleavitt; Benoit Courbaud; Francois Courbet; Thomas Curt; Adrian J Das; Evangelia Daskalakou; Hendrik Davi; Nicolas Delpierre; Sylvain Delzon; Michael Dietze; Sergio Donoso Calderon; Laurent Dormont; Josep Espelta; Timothy J Fahey; William Farfan-Rios; Catherine A Gehring; Gregory S Gilbert; Georg Gratzer; Cathryn H Greenberg; Qinfeng Guo; Andrew Hacket-Pain; Arndt Hampe; Qingmin Han; Janneke Hille Ris Lambers; Kazuhiko Hoshizaki; Ines Ibanez; Jill F Johnstone; Valentin Journé; Daisuke Kabeya; Christopher L Kilner; Thomas Kitzberger; Johannes M H Knops; Richard K Kobe; Georges Kunstler; Jonathan G A Lageard; Jalene M LaMontagne; Mateusz Ledwon; Francois Lefevre; Theodor Leininger; Jean-Marc Limousin; James A Lutz; Diana Macias; Eliot J B McIntire; Christopher M Moore; Emily Moran; Renzo Motta; Jonathan A Myers; Thomas A Nagel; Kyotaro Noguchi; Jean-Marc Ourcival; Robert Parmenter; Ian S Pearse; Ignacio M Perez-Ramos; Lukasz Piechnik; John Poulsen; Renata Poulton-Kamakura; Miranda D Redmond; Chantal D Reid; Kyle C Rodman; Francisco Rodriguez-Sanchez; Javier D Sanguinetti; C Lane Scher; William H Schlesinger; Harald Schmidt Van Marle; Barbara Seget; Shubhi Sharma; Miles Silman; Michael A Steele; Nathan L Stephenson; Jacob N Straub; I-Fang Sun; Samantha Sutton; Jennifer J Swenson; Margaret Swift; Peter A Thomas; Maria Uriarte; Giorgio Vacchiano; Thomas T Veblen; Amy V Whipple; Thomas G Whitham; Andreas P Wion; Boyd Wright; S Joseph Wright; Kai Zhu; Jess K Zimmerman; Roman Zlotin; Magdalena Zywiec; James S Clark Journal: Nat Commun Date: 2022-05-02 Impact factor: 17.694
Authors: Rachele Falchi; Claudio Bonghi; María F Drincovich; Franco Famiani; María V Lara; Robert P Walker; Giannina Vizzotto Journal: Front Plant Sci Date: 2020-11-13 Impact factor: 5.753