TY  - JOUR
AU  - Meland, M.
AU  - Akšić, M.F.
AU  - Maas, F.M.
PY  - 2022
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/6232
AB  - An intensive planting of ‘Celina’ pears on quince ‘Adams’ rootstock was established in May 2015 at NIBIO Ullensvang, western Norway. Five training systems (super spindles, trees with two leaders parallel to the row directions, slender spindles, and V-hedges of trees with 2 or with 4 leaders) were evaluated. Row distance was 3.5 m, and planting distance was 1.0 m except for super spindle trees and V-hedge with two leaders (0.5 m). Cultivars ‘Anna’ and ‘Fritjof’, used as pollinizers, were evenly distributed in the orchard and had good overlapping in flowering time. To get a faster establishment, the trees were headed back in winter 2016 when the formation of the different training systems was started. The first fruits were harvested in 2018. Due to unfavorable pollination conditions, fruit set in 2018 was very low. Average yields varied between 2.7 t ha-1 for the super spindle trees to 10 t ha-1 for the spindle trees. As a result of ample flowering and optimum pollination conditions, fruit set in 2019 was excellent, and average yields varied between 17 t ha-1 for the 2-leader trees planted parallel to the row direction to 47 t ha-1 for the 2-leader V-hedge trees. Fruit size was inversely related to fruit number per tree. Fruit weight depended on crop load per canopy volume and varied between 130 g for the two smallest trees (super spindles and 2-leader V-hedge system) and 180 g for the 2-leader trees planted parallel to the row direction. Soluble solid contents were high (11% on average), with no differences between training systems. After three cropping years, the spindle trees and V-hedge with 4 leaders per tree were the most productive systems per tree. However, the super spindle and 2-leader V-hedge system with twice the number of trees were the most productive systems per hectare. © 2022 International Society for Horticultural Science. All rights reserved.
T2  - Acta Horticulturae
T2  - Acta Horticulturae
T1  - Performance of high density planting systems of ‘Celina’ pears during the first cropping years in a Nordic climate
EP  - 252
SP  - 245
VL  - 1346
DO  - 10.17660/ActaHortic.2022.1346.31
ER  - 

@article{
author = "Meland, M. and Akšić, M.F. and Maas, F.M.",
year = "2022",
abstract = "An intensive planting of ‘Celina’ pears on quince ‘Adams’ rootstock was established in May 2015 at NIBIO Ullensvang, western Norway. Five training systems (super spindles, trees with two leaders parallel to the row directions, slender spindles, and V-hedges of trees with 2 or with 4 leaders) were evaluated. Row distance was 3.5 m, and planting distance was 1.0 m except for super spindle trees and V-hedge with two leaders (0.5 m). Cultivars ‘Anna’ and ‘Fritjof’, used as pollinizers, were evenly distributed in the orchard and had good overlapping in flowering time. To get a faster establishment, the trees were headed back in winter 2016 when the formation of the different training systems was started. The first fruits were harvested in 2018. Due to unfavorable pollination conditions, fruit set in 2018 was very low. Average yields varied between 2.7 t ha-1 for the super spindle trees to 10 t ha-1 for the spindle trees. As a result of ample flowering and optimum pollination conditions, fruit set in 2019 was excellent, and average yields varied between 17 t ha-1 for the 2-leader trees planted parallel to the row direction to 47 t ha-1 for the 2-leader V-hedge trees. Fruit size was inversely related to fruit number per tree. Fruit weight depended on crop load per canopy volume and varied between 130 g for the two smallest trees (super spindles and 2-leader V-hedge system) and 180 g for the 2-leader trees planted parallel to the row direction. Soluble solid contents were high (11% on average), with no differences between training systems. After three cropping years, the spindle trees and V-hedge with 4 leaders per tree were the most productive systems per tree. However, the super spindle and 2-leader V-hedge system with twice the number of trees were the most productive systems per hectare. © 2022 International Society for Horticultural Science. All rights reserved.",
journal = "Acta Horticulturae, Acta Horticulturae",
title = "Performance of high density planting systems of ‘Celina’ pears during the first cropping years in a Nordic climate",
pages = "252-245",
volume = "1346",
doi = "10.17660/ActaHortic.2022.1346.31"
}

Meland, M., Akšić, M.F.,& Maas, F.M.. (2022). Performance of high density planting systems of ‘Celina’ pears during the first cropping years in a Nordic climate. in Acta Horticulturae, 1346, 245-252.
https://doi.org/10.17660/ActaHortic.2022.1346.31

Meland M, Akšić M, Maas F. Performance of high density planting systems of ‘Celina’ pears during the first cropping years in a Nordic climate. in Acta Horticulturae. 2022;1346:245-252.
doi:10.17660/ActaHortic.2022.1346.31 .

Meland, M., Akšić, M.F., Maas, F.M., "Performance of high density planting systems of ‘Celina’ pears during the first cropping years in a Nordic climate" in Acta Horticulturae, 1346 (2022):245-252,
https://doi.org/10.17660/ActaHortic.2022.1346.31 . .

TY  - CONF
AU  - Meland, Mekjell
AU  - Froynes, Oddmund
AU  - Fotirić-Akšić, Milica
AU  - Maas, F.M.
PY  - 2020
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5430
AB  - The triploid pear cultivar 'Ingeborg' is currently the main commercial pear cultivar grown in Norway. However, fruit set and subsequent yields of this cultivar have proven to be variable and overall rather low. In order to promote the fruit set, different bioregulators were applied during and after bloom and compared with an untreated control. Investigations were done during the period 2017-2018, at NIBIO Ullensvang, western Norway. Different dosages of both gibberellins (GA3, trade name GIBB 3, 10% active ingredient (a.i.) and GA4/7, trade name Novagib®, 1% a.i.) were applied at full bloom and at petal fall. Additional applications of the growth retardant prohexadione-Ca (trade name Regalis®, 10% a.i.) were applied twice, when bourse shoots had 3-5 leaves and after one month later. Ethephon (Cerone (480 g a.i. L-1)) was applied three times starting about 7 days after petal fall with ca. 7- to 10-day intervals. All gibberellin applications significantly increased fruit set compared to the untreated control. One single application with GA3 (3 g ha-1) almost tripled the fruit number per 100 flower clusters when compared with the control (136 and 46, respectively). The yield response was similar (16.8 to 9.6 kg tree-1, respectively). Similar results occurred with one application of GA4/7 (12 g ha-1) with the same crop load level, and the fruit weights were similar to the control (130 g). Prohexadione-Ca treatments significantly reduced shoot growth of the pear trees. Two treatments with 125 g ha-1 or one treatment of 250 g ha-1 reduced the growth by ~35% but had no significant effect on fruit set and yield. The multiple ethephon applications (275 mL ha-1 in total) had no effect on both set and shoot growth, and return bloom compared to the untreated or gibberellin treated trees.
PB  - International Society for Horticultural Science
C3  - Acta Horticulturae
T1  - Promoting fruit set of 'Ingeborg' pears in a northern climate
EP  - 398
SP  - 393
VL  - 1281
DO  - 10.17660/ActaHortic.2020.1281.52
ER  - 

@conference{
author = "Meland, Mekjell and Froynes, Oddmund and Fotirić-Akšić, Milica and Maas, F.M.",
year = "2020",
abstract = "The triploid pear cultivar 'Ingeborg' is currently the main commercial pear cultivar grown in Norway. However, fruit set and subsequent yields of this cultivar have proven to be variable and overall rather low. In order to promote the fruit set, different bioregulators were applied during and after bloom and compared with an untreated control. Investigations were done during the period 2017-2018, at NIBIO Ullensvang, western Norway. Different dosages of both gibberellins (GA3, trade name GIBB 3, 10% active ingredient (a.i.) and GA4/7, trade name Novagib®, 1% a.i.) were applied at full bloom and at petal fall. Additional applications of the growth retardant prohexadione-Ca (trade name Regalis®, 10% a.i.) were applied twice, when bourse shoots had 3-5 leaves and after one month later. Ethephon (Cerone (480 g a.i. L-1)) was applied three times starting about 7 days after petal fall with ca. 7- to 10-day intervals. All gibberellin applications significantly increased fruit set compared to the untreated control. One single application with GA3 (3 g ha-1) almost tripled the fruit number per 100 flower clusters when compared with the control (136 and 46, respectively). The yield response was similar (16.8 to 9.6 kg tree-1, respectively). Similar results occurred with one application of GA4/7 (12 g ha-1) with the same crop load level, and the fruit weights were similar to the control (130 g). Prohexadione-Ca treatments significantly reduced shoot growth of the pear trees. Two treatments with 125 g ha-1 or one treatment of 250 g ha-1 reduced the growth by ~35% but had no significant effect on fruit set and yield. The multiple ethephon applications (275 mL ha-1 in total) had no effect on both set and shoot growth, and return bloom compared to the untreated or gibberellin treated trees.",
publisher = "International Society for Horticultural Science",
journal = "Acta Horticulturae",
title = "Promoting fruit set of 'Ingeborg' pears in a northern climate",
pages = "398-393",
volume = "1281",
doi = "10.17660/ActaHortic.2020.1281.52"
}

Meland, M., Froynes, O., Fotirić-Akšić, M.,& Maas, F.M.. (2020). Promoting fruit set of 'Ingeborg' pears in a northern climate. in Acta Horticulturae
International Society for Horticultural Science., 1281, 393-398.
https://doi.org/10.17660/ActaHortic.2020.1281.52

Meland M, Froynes O, Fotirić-Akšić M, Maas F. Promoting fruit set of 'Ingeborg' pears in a northern climate. in Acta Horticulturae. 2020;1281:393-398.
doi:10.17660/ActaHortic.2020.1281.52 .

Meland, Mekjell, Froynes, Oddmund, Fotirić-Akšić, Milica, Maas, F.M., "Promoting fruit set of 'Ingeborg' pears in a northern climate" in Acta Horticulturae, 1281 (2020):393-398,
https://doi.org/10.17660/ActaHortic.2020.1281.52 . .