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2017, № 64

UDC: 634.1-15
GSNTI: 68.35.53

Prospects physiologically active substances for the formation of yield citrus fruit

Investigations related to the justification of the possibility of applying to the conditions of the subtropics some physiologically active substances of the new generation with different mechanisms of action to mitigate nezhe-desirable to pre-harvest fruit drop and, consequently, increase the economic yield from citrus crops: oranges and tangerines. Field experiments were set in 2011-2012 in 22 years old orange plantations, located near Gingin Western Australia (climate of the region - the Mediterranean with typical raining in the winter and dry, hot summers; the soil - sand), and in 2016 a 30-year-old garden in a tangerine humid subtropics of the Russian Federation (Sochi; soils - brown forest). Studies show that treatment of plant varieties of orange «Washington Navel» ethylene synthesis inhibitor AVG in a concentration of 60 mg / l when the size of 3.0 cm fruit abscission reduces their development in 2.0-3.5 times in comparison with the control. For varieties «Lane Late» AVG optimal concentration is 20 mg / l. The assumption of various orange varieties responsive to the action of the drug. Identifying promising use in plantations tangerine variety “Miyagawa Wase” and russian drug "Melaphen" (application time - fruit size 3.0 cm). The ability of the compound to activate the photosynthetic activity of tangerine plants and the outflow of assimilates mainly to the generative organs at the second half of vegetation period. A wide range of action of the drug allows better preservation of fruit on the tree are formed, increasing their size (weight average) and, ultimately, increase the economic yield of 17% compared to control values. However, when used in the second half of the vegetation IAA similar effect is not achieved.
Keywords: Plants, orange, tangerine, fruits, formation, pre-harvest fruit drop, samples, economic yield
DOI: 10.21515/1999-1703-64-71-76

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Authors:

1. Doroshenko Tatyana Nikolaevna, Dr. of agriculture sciences, professor, Honored Scientist of Russia, Head of the Horticulture department, Federal State Budgetary Educational Institution of Higher Education “I.T. Trubilin Kuban State Agrarian University”.
2. Ryazanova Ludmila Georgievna, PhD in agriculture, associate professor, Federal State Budgetary Educational Institution of Higher Education “I.T. Trubilin Kuban State Agrarian University”.
3. Al-Husseini Aqeel Mohammed Abdulameer, Post-graduate student, Federal State Budgetary Educational Institution of Higher Education “I.T. Trubilin Kuban State Agrarian University”.
4. Maksimtcov Denis Vitalyevich, PhD in agriculture, assistant, Federal State Budgetary Educational Institution of Higher Education “I.T. Trubilin Kuban State Agrarian University”.
5. Nenyko Natalia Ivanovna, Dr of agricultural sciences, professor, Head of Physiology and biochemistry of plants laboratory, Federal State Budget Scientific Organization "North Caucasian Regional Research Institute of Horticulture and Viticulture".
6. Belous Oxana Gennadievna, Dr of biological sciences, associate professor, Chief Scientific Officer of the Laboratory of Biotechnology, Plant Physiology and Biochemistry, Russian Research Institute of Floriculture and Subtropical Crops.