Testing of original plant growth regulators to obtain grape seedlings that meet the quality standard

An important reserve for increasing the yield and quality of agricultural products is the use of plant growth regulators (PPR). Plant growth regulators (PPP) are used in many branches of agriculture. In viticulture, they are used to increase yields, presentation of bunches, in the breeding process and to obtain well-developed seedlings in nursery. Their use ensures a more complete use of the biological potential of grapes, allows you to increase the yield of planting material per unit area and significantly improve the quality of seedlings.

By the end of the 80s of the last century, plant growth regulators began to be considered as an independent extensive class of physiologically active substances. PPP have become a qualitatively new method of intensifying production in agriculture and most fully meet the growing requirements for ensuring the safety of pesticides for human health, warm-blooded animals, and the beneficial fauna of agrocenoses. [12].
According to experts from the All-Russian Research Institute of Agrochemistry. D.N. Pryanishnikov, currently 8-10 plant growth regulators are widely used in agriculture, and the cultivated area is about 10 million hectares and the growth rate of their use is constantly increasing [3].

Research on the search and testing of new plant growth regulators is a topical issue for agriculture. The purpose of our research was to determine the most effective root formation stimulator to reduce the time of root formation in grafted cuttings in a school of seedlings.

Starting from 2019, at the production base of OA AF "Yuzhnaya", employees of department No. 8 are testing stimulants of root formation on grape planting material
The experiment was carried out on rootstock cuttings of the Kober 5BB variety. The establishment of the laboratory-vegetation and field experiments was carried out according to the method of the field experiment by B.A. Dospekhov. Biometric records and observation of the development of seedlings were carried out according to generally accepted methods in viticulture. Mathematical data processing was carried out according to B.A. Dospekhov. using the Microsoft Office Excel program. The concentration of the preparations was 40 mg / l, the exposure time was 24 hours. Experimental data are presented in table 1.

Таблица 1 – Показатели корнеобразования у черенков, ОА АФ «Южная» 2019-2020 гг.

From the data presented in the table it can be seen that only on the BCI and NAA variants there is 100% root formation on the cuttings during all observation periods, on the cuttings treated with FITAKTIV Extra gel, on days 21 and 28, there is an explosive root formation compared to the counts on the 14th day. after disembarkation. On the BCI variant, the largest number of roots is observed on the 14th day after planting - 19 pieces; in the subsequent observation periods, this variant showed a stable dynamics of an increase in the average number of roots.
Thus, studies have shown that the use of growth regulators promoted more intensive root formation. According to the complex of physiological indicators, variants with growth regulators were distinguished: BCI and NAA; it should also be noted that the FITAKTIV Extra gel (short-term dipping) option is also of certain interest as a stimulant of root formation.

List of used literature:
1. Hamburg K.Z., Kulaeva O.N., Muromtsev GS, Prusakova L.D., Chkannikov D.I. Plant Growth Regulators / Ed. Muromtseva G.S. Moscow: Kolos, 1979.279 p.
2. Ponomarenko S.P. Plant growth regulators. - Kiev, 2003 .-- 319 p.
3. Prusakova LD, Malevannaya N.N., Belopukhov S.L., Vakulenko V.V. Plant growth regulators with anti-stress and immunoprotective properties. // Agrochemistry - 2005. - No. 11. - P. 76-86.