Parameters of apple tree crowns depending on the crown shape and pruning time
Abstract
The apple tree is a leading fruit crop in Ukraine in terms of production volumes and planting areas and is a valuable food product with a high content of vitamins. In new modern plantings, fruit producers prefer intensive cultivation technologies that ensure the maximum amount of high-quality fruit yield per unit area. The main criterion for solving this problem is the design of plantings: a narrow-row scheme for planting trees and a low-volume crown shape. The purpose of the study was to establish the influence of the pruning period of different types of crown formations on the growth and productivity of apple trees of two varieties: Fuji and Honey Crisp. The study was conducted in the conditions of the central Forest-Steppe of Ukraine (Uman National University of Horticulture). The scheme of planting was 4x1 m, M.9 rootstock, chernozem sod-podzolic soil, drip irrigation. Field, statistical, and computational-analytical methods were used in the course of the study. It was identified that the growth pattern of the examined varieties differed substantially, and crown volume, projection area, and development of the feeding area prevailed in Honey Crisp trees. However, in terms of productivity, the plantings of the Fuji variety substantially exceeded the values of the Honey Crisp variety. Forming a ballerina crown with the removal of overgrown wood in a 25 cm zone on the central trunk above the lower tier of semi-cellular branches provided an increase in the growth activity of the examined trees by 3-5%. A substantial decrease in the values of crown parameters was provided by the formation of the French axis crown – there was a decrease in the crown diameter by 44%, the crown volume – by 67%, and the crown projection area and the development of the feeding area – by 69%. Performing additional summer pruning of trees also helped to reduce growth activity by 6-11%. However, the specific productivity of plantings doubled in plantings with the formation of the French axis and by 45-50% with the introduction of double pruning of trees. It is recommended that agricultural producers investigate the terms of pruning low-volume crown forms, considering varietal characteristics, to create compacted apple stands and increase the intensification of production
Keywords
apple tree; crown shape; pruning time; crown volume; summer pruning
[1] Chaploutskyi, A.M., & Melnyk, O.V. (2019) The formation of the productivity of apple trees depending on the method and period of pruning. Collection of Scientific Works of the UNUS, 95(1), 199-206. doi: 10.3195/24158240-2019-95-1-199-206.
[2] Conesa, M.R., Martínez-López, L., Conejero W., Vera, J., & Ruiz-Sánchez, M.C. (2019). Summer pruning of earlymaturing. Prunus persica: Water implications. Scientia Horticulturae, 256, article number 15. doi: 10.1016/j. scienta.2019.05.066.
[3] Crassweller, R., Peter, K., Krawczyk, G., Schupp, J., Ford, T., Brittingham, M., Johnson, J., LaBorde, L., Harper, J., Kephart, K., Pifer, R., Kelley, K., He, L., Heinemann, P., Biddinger, D., Lopez-Uribe, M., Marini, R., Baugher, T., & Weber, D. (2020). Penn state tree fruit production guide. Pennsylvania: Penn State Extension Publication.
[4] D’Abrosca, B., Scognamiglio, M., Corrado, L., Chiocchio, I., Zampella, L., Mastrobuoni, F., Rega, P., Scortichini, M., Fiorentino, A., & Petriccione, M. (2017). Evaluation of different training systems on Annurca apple fruits revealed by agronomical, qualitative and NMR-based metabolomic approaches. Food Chemistry, 222, 18-27. doi: 10.1016/j.foodchem.2016.11.144.
[5] Franzen, J.B., & Hirst, P.M. (2016). Optimal pruning of apple and effects on tree architecture, productivity, and fruit quality. Acta Horticulturae, 1130, 307-310. doi: 10.17660/ActaHortic.2016.1130.45.
[6] Goke, A, Serra, S., & Musacchi, S. (2020). Manipulation of fruit dry matter via seasonal pruning and its relationship to d’anjou pear yield and fruit quality. Agronomy, 10(6), article number 897. doi: 10.3390/agronomy10060897.
[7] He, L., & Schupp, J. (2018). Sensing and automation in pruning of apple trees: A review. Agronomy, 8(10), article number 211. doi: 10.3390/agronomy8100211.
[8] Johansen, K., Raharjo, T., & McCabe, M.F. (2018). Using multi-spectral UAV imagery to extract tree crop structural properties and assess pruning effects. Remote Sensing, 10(6), article number 854. doi: 10.3390/rs10060854.
[9] Kolmanič, S., Strnad, D., Kohek, Š., Benes, B., Hirst, P., & Žalik, B. (2021). An algorithm for automatic dormant tree pruning. Applied, 99, article number 106931. doi: 10.1016/j.asoc.2020.106931.
[10] Kondratenko, P.V., & Bagel, M.O. (1999). Methodology of conducting research with fruit crops. Kyiv: Agrarian science.
[11] Laužikė, K., Sirgedaitė-Šėžienė, V., Uselis, N., & Samuolienė, G. (2020). The impact of stress caused by light penetration and agrotechnological tools on photosynthetic behavior of apple trees. Scientific Reports, 10, article number 9177. doi: 10.1038/s41598-020-66179-3.
[12] Lordan, J., Francescatto, P., Dominguez, L.I., & Robinson, T.L. (2018). Long-term effects of tree density and tree shape on apple orchard performance, a 20 year study – Part 1, agronomic analysis. Scientia Horticulturae, 238, 303-317. doi: 10.1016/j.scienta.2018.04.033.
[13] Lugaresi, A., Steffens, C.A., de Souza, M.PP., Talamini do Amarante, C.V., Brighenti, A.F., da Silveira Pasa, M., & de Martin, M.Sch. (2022). Late summer pruning improves the quality and increases the content of functional compounds in Fuji apples. Bragantia, 81, 1-10. doi: 10.1590/1678-4499.20210234.
[14] Marini, R.P. (2020). Training and pruning apple trees. Retrieved from http://pubs.ext.vt.edu/422/422-021/422-021.html.
[15] Melnyk, O., & Kravtsova, Ya. (2018). The habit of the crown of an apple tree depending on the period and method of pruning. Collection of Scientific Works of the Uman National University of Horticulture, 93(1), 126-135. doi: 10.31395/2415-8240-2018-93-1-126-135.
[16] Mierowska, A., Keutgen, N., Huysamer, M., & Smith, V. (2022). Photosynthetic acclimation of apple spur leaves to summer-pruning. Scientia Horticulturae, 92(1), 9-27. doi: 10.1016/S0304-4238(01)00275-8.
[17] Mu, Yu., Fujii, Yu., Takata, D., Zheng, B., Noshita, K., Honda, K., Ninomiya, S., & Guo, W. (2018). Characterization of peach tree crown by using high-resolution images from an unmanned aerial vehicle. Horticulture Research, 5, article number 74. doi: 10.1038/s41438-018-0097-z.
[18] Musacchi, S., & Serra, S. (2018). Apple fruit quality: Overview on pre-harvest factors. Scientia Horticulturae, 234(14), 409-430. doi: 10.1016/j.scienta.2017.12.057.
[19] Reiga, G., Lordanb, J., Miranda, M., Stephen, S., Michael, H., Gabino, F., Daniel, R., Donahued, J., Francescattob, P., Faziobf, G., & Robinsonb, T. (2019). Long-term performance of ‘Gala’, Fuji’ and ‘Honeycrisp’ apple trees grafted on Geneva® rootstocks and trained to four production systems under New York State climatic conditions. Scientia Horticulturae, 244, 277-293. doi: 10.1016/j.scienta.2018.09.025.
[20] Ruiz-Sánchez, M.C., Abrisqueta, I., López-Martínez, L., Conejero, W., Conesa, M.R., & Vera, J. (2022). Longterm summer pruning in peach trees: Is it an advisable cultural practice? Acta Horticulturae, 1335, 491-498. doi: 10.17660/ActaHortic.2022.1335.61.
[21] Siefen, N., McCormick, R.J., Vogel, A.M., & Biegert, K. (2023). Effects of laser scanner quality and tractor speed to characterise apple tree canopies. Smart Agricultural Technology, 4, article number 100173. doi: 10.1016/j. atech.2023.100173.
[22] Strnad, D., Kohek, Š., Benes, B., Kolmanič, S., & Žalik, B. (2020). A framework for multi-objective optimization of virtual tree pruning based on growth simulation. Expert Systems with Applications, 162, article number 113792. doi: 10.1016/j.eswa.2020.113792.
[23] Tustin, D.S., Breen, K.C., & van Hooijdonk, B.M. (2022). Light utilisation, leaf canopy properties and fruiting responses of narrow-row, planar cordon apple orchard planting systems – A study of the productivity of apple. Scientia Horticulturae, 294, article number 110778. doi: 10.1016/j.scienta.2021.110778.
[24] Vosnjak, М., Mrzlic, D., & Usenik, V. (2021). Summer pruning of sweet cherry: A way to control sugar content in different organs. Science of Food and Agriculture, 102(3), 1216-1224. doi: 10.1002/jsfa.11459.
[25] Wang, H., Yuan, J., Liu, T., Chen, L., Ban, Zh., Duan, L., Wang, L., Tang, Y., Li, X., & Li, J. (2023). Fruit canopy position and harvest period affect watercore development and quality of the ‘Fuji’ apple cultivar fruit. Scientia Horticulturae, 311, article number 111793. doi: 10.1016/j.scienta.2022.111793.
[26] Zahid, A., He, L., & Choi, D. (2020). Collision free path planning of a robotic manipulator for pruning apple trees. In ASABE Annual International Virtual Meeting. doi: 10.13031/aim.202000439.
[27] Zhang, J., Serra, S., Leisso, R.S., & Musacchi, S. (2016). Effect of light microclimate on the quality of ‘d’Anjou’ pears in mature open-centre tree architecture. Biosystems Engineering, 141, 1-11. doi: 10.1016/j. biosystemseng.2015.11.002.