TY  - CONF
AU  - Koren, Anamarija
AU  - Kiprovski, Biljana
AU  - Brdar-Jokanović, Milka
AU  - Ljevnaić-Mašić, Branka
AU  - Glavaš-Trbić, Danica
AU  - Sikora, Vladimir
AU  - Marjanović-Jeromela, Ana
PY  - 2022
UR  - http://fiver.ifvcns.rs/handle/123456789/3103
AB  - Quantitative variations in the sex ratio significantly affect the industrial hemp (fiber hemp) cultivation, since the production is closely related to the reproductive biology of the species. Both dioecious and monoecious varieties are cultivated, but only monoecious ones enable simultaneously mechanized harvesting of stalks and grains. 2-chloroethylphosphonic acid (Ethrel®) is a synthetic plant growth regulator that affects sex expression and suppresses stem elongation and plant growth. Thus, four various dosages of Ethrel® were applied as foliar sprays to fiber hemp plants cv. Marina, twice- in stage of flower primordia and, two weeks later in stage of flower formation. The trial was set up in Bački Petrovac at experimental field of the IFVCNS, as completly randomized block design in three replicates. Sex ratio in the control plots was 37.11 to 62.89% in favor of femail plants. Although the ratio significantly changed with increase of applied Ethrel dosages (47.84 to 52.15 at maximal applied Ethrel concentration, 2.5 ml l-1), the total grain yield significantly decreased only if plants were treated with the highest dosage, 748.04 kg ha-1 compared to 836.81 kg ha-1 in control plots. Treated plants had shorter stems (276.78 cm and 233.84 cm in control and plants treated with 2.5 ml l-1 of Ethrel, respectively) with lower fiber content. The fiber content in these stems was by 8% lower (20.10%) compared to the stem fiber content of the control plants (28.25%). The applied Ethrel treatments had no statistically significant effect on the hemp stem diameter.
PB  - Belgrade : Serbian Plant Physiology Society
PB  - Belgrade : University of Belgrade, Institute for Biological Research „Siniša Stanković“
PB  - Belgrade : University of Belgrade, Faculty of Biology
C3  - Book of Abstracts, 4th International Conference on Plant Biology (23rd SPPS Meeting), 6-8 October 2022, Belgrade
T1  - The effect of 2-chloroethylphosphonic acid foliar application on stem yield components and sex expression in fiber hemp ’Marina’
EP  - 79
SP  - 79
UR  - https://hdl.handle.net/21.15107/rcub_fiver_3103
ER  - 

@conference{
author = "Koren, Anamarija and Kiprovski, Biljana and Brdar-Jokanović, Milka and Ljevnaić-Mašić, Branka and Glavaš-Trbić, Danica and Sikora, Vladimir and Marjanović-Jeromela, Ana",
year = "2022",
abstract = "Quantitative variations in the sex ratio significantly affect the industrial hemp (fiber hemp) cultivation, since the production is closely related to the reproductive biology of the species. Both dioecious and monoecious varieties are cultivated, but only monoecious ones enable simultaneously mechanized harvesting of stalks and grains. 2-chloroethylphosphonic acid (Ethrel®) is a synthetic plant growth regulator that affects sex expression and suppresses stem elongation and plant growth. Thus, four various dosages of Ethrel® were applied as foliar sprays to fiber hemp plants cv. Marina, twice- in stage of flower primordia and, two weeks later in stage of flower formation. The trial was set up in Bački Petrovac at experimental field of the IFVCNS, as completly randomized block design in three replicates. Sex ratio in the control plots was 37.11 to 62.89% in favor of femail plants. Although the ratio significantly changed with increase of applied Ethrel dosages (47.84 to 52.15 at maximal applied Ethrel concentration, 2.5 ml l-1), the total grain yield significantly decreased only if plants were treated with the highest dosage, 748.04 kg ha-1 compared to 836.81 kg ha-1 in control plots. Treated plants had shorter stems (276.78 cm and 233.84 cm in control and plants treated with 2.5 ml l-1 of Ethrel, respectively) with lower fiber content. The fiber content in these stems was by 8% lower (20.10%) compared to the stem fiber content of the control plants (28.25%). The applied Ethrel treatments had no statistically significant effect on the hemp stem diameter.",
publisher = "Belgrade : Serbian Plant Physiology Society, Belgrade : University of Belgrade, Institute for Biological Research „Siniša Stanković“, Belgrade : University of Belgrade, Faculty of Biology",
journal = "Book of Abstracts, 4th International Conference on Plant Biology (23rd SPPS Meeting), 6-8 October 2022, Belgrade",
title = "The effect of 2-chloroethylphosphonic acid foliar application on stem yield components and sex expression in fiber hemp ’Marina’",
pages = "79-79",
url = "https://hdl.handle.net/21.15107/rcub_fiver_3103"
}

Koren, A., Kiprovski, B., Brdar-Jokanović, M., Ljevnaić-Mašić, B., Glavaš-Trbić, D., Sikora, V.,& Marjanović-Jeromela, A.. (2022). The effect of 2-chloroethylphosphonic acid foliar application on stem yield components and sex expression in fiber hemp ’Marina’. in Book of Abstracts, 4th International Conference on Plant Biology (23rd SPPS Meeting), 6-8 October 2022, Belgrade
Belgrade : Serbian Plant Physiology Society., 79-79.
https://hdl.handle.net/21.15107/rcub_fiver_3103

Koren A, Kiprovski B, Brdar-Jokanović M, Ljevnaić-Mašić B, Glavaš-Trbić D, Sikora V, Marjanović-Jeromela A. The effect of 2-chloroethylphosphonic acid foliar application on stem yield components and sex expression in fiber hemp ’Marina’. in Book of Abstracts, 4th International Conference on Plant Biology (23rd SPPS Meeting), 6-8 October 2022, Belgrade. 2022;:79-79.
https://hdl.handle.net/21.15107/rcub_fiver_3103 .

Koren, Anamarija, Kiprovski, Biljana, Brdar-Jokanović, Milka, Ljevnaić-Mašić, Branka, Glavaš-Trbić, Danica, Sikora, Vladimir, Marjanović-Jeromela, Ana, "The effect of 2-chloroethylphosphonic acid foliar application on stem yield components and sex expression in fiber hemp ’Marina’" in Book of Abstracts, 4th International Conference on Plant Biology (23rd SPPS Meeting), 6-8 October 2022, Belgrade (2022):79-79,
https://hdl.handle.net/21.15107/rcub_fiver_3103 .