CHEMICAL APPLICATIONS AFFECTED DORMANCY BREAKING IN ‘MODI’ APPLE CULTIVAR UNDER SUBTROPICAL CONDITIONS
The winter chill is essential for most fruit crops. Fruit trees require a certain number of chill hours, also called chill units, each winter to produce fruits in the next summer. Insufficient chilling accumulation during winter period usually results in blooming disorders and decreases the fruit y...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
University of Life Sciences in Lublin - Publishing House
2016-12-01
|
| Series: | Acta Scientiarum Polonorum: Hortorum Cultus |
| Subjects: | |
| Online Access: | https://czasopisma.up.lublin.pl/index.php/asphc/article/view/2529 |
| _version_ | 1797394041840599040 |
|---|---|
| author | Burhanettin Đmrak Ayzin B. Küden Ali Küden A. Kadir Sarier Berken Çimen |
| author_facet | Burhanettin Đmrak Ayzin B. Küden Ali Küden A. Kadir Sarier Berken Çimen |
| author_sort | Burhanettin Đmrak |
| collection | DOAJ |
| description |
The winter chill is essential for most fruit crops. Fruit trees require a certain number of chill hours, also called chill units, each winter to produce fruits in the next
summer. Insufficient chilling accumulation during winter period usually results in blooming disorders and decreases the fruit yield of deciduous fruit trees. Dormancy can be broken by using chemicals, such as Dormex. In recent years Dormex has been forbidden in some countries, including Turkey since it was found to be carcinogenic to human beings. This situation raised a necessity to find alternative chemicals to Dormex to be used in subtropical climate regions. For this purpose, six years old trees of ‘Modi’ apple scions (Malus sylvestris, Mill) grafted on Malling-Merton M9 rootstocks were sprayed with 6% Erger (total nitrogen, 15.0%; ureic nitrogen, 6.1%; nitric nitrogen, 5.8%; ammoniacal, 3.1%; water soluble calcium oxide, 4.7%), hydrogen cyanamide 4% (Dormex) and potassium
nitrate 8% (KNO3 ) for breaking dormancy of the buds during 2011–2013. Calculating the chilling hours below 7°C and chill unit (CU) values during the experimental winter periods, 497 to 828 h and 357 to 467 CU of chilling durations were obtained under subtropical conditions of Adana (36°56 12'04''N. 35° 33'53.46''E ). Modi broke endodormancy of the buds on 20 February 2012 with the accumulation of 375 CU and 550 h. The effects of dormancy breaking agents on bud break, fruit set and fruit quality were investigated. Erger markedly advanced bud-break and increased the final fruit set, quality and yield in comparison with the other treatments and control.
|
| first_indexed | 2024-03-09T00:13:45Z |
| format | Article |
| id | doaj.art-f6ac761f006a4454aad37701aad91c5f |
| institution | Directory Open Access Journal |
| issn | 1644-0692 2545-1405 |
| language | English |
| last_indexed | 2024-03-09T00:13:45Z |
| publishDate | 2016-12-01 |
| publisher | University of Life Sciences in Lublin - Publishing House |
| record_format | Article |
| series | Acta Scientiarum Polonorum: Hortorum Cultus |
| spelling | doaj.art-f6ac761f006a4454aad37701aad91c5f2023-12-12T09:44:41ZengUniversity of Life Sciences in Lublin - Publishing HouseActa Scientiarum Polonorum: Hortorum Cultus1644-06922545-14052016-12-01156CHEMICAL APPLICATIONS AFFECTED DORMANCY BREAKING IN ‘MODI’ APPLE CULTIVAR UNDER SUBTROPICAL CONDITIONSBurhanettin ĐmrakAyzin B. KüdenAli KüdenA. Kadir SarierBerken Çimen The winter chill is essential for most fruit crops. Fruit trees require a certain number of chill hours, also called chill units, each winter to produce fruits in the next summer. Insufficient chilling accumulation during winter period usually results in blooming disorders and decreases the fruit yield of deciduous fruit trees. Dormancy can be broken by using chemicals, such as Dormex. In recent years Dormex has been forbidden in some countries, including Turkey since it was found to be carcinogenic to human beings. This situation raised a necessity to find alternative chemicals to Dormex to be used in subtropical climate regions. For this purpose, six years old trees of ‘Modi’ apple scions (Malus sylvestris, Mill) grafted on Malling-Merton M9 rootstocks were sprayed with 6% Erger (total nitrogen, 15.0%; ureic nitrogen, 6.1%; nitric nitrogen, 5.8%; ammoniacal, 3.1%; water soluble calcium oxide, 4.7%), hydrogen cyanamide 4% (Dormex) and potassium nitrate 8% (KNO3 ) for breaking dormancy of the buds during 2011–2013. Calculating the chilling hours below 7°C and chill unit (CU) values during the experimental winter periods, 497 to 828 h and 357 to 467 CU of chilling durations were obtained under subtropical conditions of Adana (36°56 12'04''N. 35° 33'53.46''E ). Modi broke endodormancy of the buds on 20 February 2012 with the accumulation of 375 CU and 550 h. The effects of dormancy breaking agents on bud break, fruit set and fruit quality were investigated. Erger markedly advanced bud-break and increased the final fruit set, quality and yield in comparison with the other treatments and control. https://czasopisma.up.lublin.pl/index.php/asphc/article/view/2529Malus sylvestrisMill.Ergerbud breakchilling accumulationfruit quality and yield |
| spellingShingle | Burhanettin Đmrak Ayzin B. Küden Ali Küden A. Kadir Sarier Berken Çimen CHEMICAL APPLICATIONS AFFECTED DORMANCY BREAKING IN ‘MODI’ APPLE CULTIVAR UNDER SUBTROPICAL CONDITIONS Acta Scientiarum Polonorum: Hortorum Cultus Malus sylvestris Mill. Erger bud break chilling accumulation fruit quality and yield |
| title | CHEMICAL APPLICATIONS AFFECTED DORMANCY BREAKING IN ‘MODI’ APPLE CULTIVAR UNDER SUBTROPICAL CONDITIONS |
| title_full | CHEMICAL APPLICATIONS AFFECTED DORMANCY BREAKING IN ‘MODI’ APPLE CULTIVAR UNDER SUBTROPICAL CONDITIONS |
| title_fullStr | CHEMICAL APPLICATIONS AFFECTED DORMANCY BREAKING IN ‘MODI’ APPLE CULTIVAR UNDER SUBTROPICAL CONDITIONS |
| title_full_unstemmed | CHEMICAL APPLICATIONS AFFECTED DORMANCY BREAKING IN ‘MODI’ APPLE CULTIVAR UNDER SUBTROPICAL CONDITIONS |
| title_short | CHEMICAL APPLICATIONS AFFECTED DORMANCY BREAKING IN ‘MODI’ APPLE CULTIVAR UNDER SUBTROPICAL CONDITIONS |
| title_sort | chemical applications affected dormancy breaking in modi apple cultivar under subtropical conditions |
| topic | Malus sylvestris Mill. Erger bud break chilling accumulation fruit quality and yield |
| url | https://czasopisma.up.lublin.pl/index.php/asphc/article/view/2529 |
| work_keys_str_mv | AT burhanettinđmrak chemicalapplicationsaffecteddormancybreakinginmodiapplecultivarundersubtropicalconditions AT ayzinbkuden chemicalapplicationsaffecteddormancybreakinginmodiapplecultivarundersubtropicalconditions AT alikuden chemicalapplicationsaffecteddormancybreakinginmodiapplecultivarundersubtropicalconditions AT akadirsarier chemicalapplicationsaffecteddormancybreakinginmodiapplecultivarundersubtropicalconditions AT berkencimen chemicalapplicationsaffecteddormancybreakinginmodiapplecultivarundersubtropicalconditions |