RU2298321C2 - Method for increase in sunflower productivity - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: claimed method includes treatment of vegetative sunflower plants with N-methyl-N-hydroxyethyl-n-toluylsulfonylamide in amount of 200 g/hectare.

EFFECT: new method for increase in sunflower productivity.

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Description

The invention relates to agriculture and can be used in the cultivation of sunflower.

The objective of the invention is the expansion of the arsenal of sunflower growth regulators.

The technical result of the invention is to increase the yield of sunflower.

This result is achieved in that a method for increasing sunflower yield involves treating vegetative plants with N-methyl-H-hydroxyethyl-n-toluylsulfonylamide in an amount of 200 g / ha.

The synthesis of the active substance was first carried out by the authors according to the scheme:

Motodika synthesis,

To a solution of 2.5 g (13 mmol) of n-toluenesulfonyl chloride in 40 ml of absolute benzene was added dropwise at room temperature, not allowing heating, a solution containing 0.98 g (15 mmol) of N-methylaminoethanol and 1.31 g (13 mmol) triethylamine in 20 ml of absolute benzene. After completion of the addition, the mixture was kept at room temperature for 12 h, then the precipitate of triethylamine hydrochloride and benzene were separated, and evaporated to dryness. A liquid product was obtained in the residue, which was dissolved in 15 ml of diethyl ether for purification and passed through a layer of silica gel (fraction 5/40). The ether was evaporated to give 2.51 g (84% of theory) of a zero product.

An initial assessment of the growth-regulating activity of the synthesized compound was carried out at the experimental base of VNIIBZR on sunflower seedlings according to the following procedure.

Sunflower seeds were placed for 1 hour in solutions of the obtained compound of various concentrations. The seeds of the control were soaked in water. After 1 hour, the seeds were evenly laid out on strips of filter paper, rolled up and placed in glasses with water, then in a thermostat at 28 ° C. After 3 days, the length of the stem and root was measured. Growth-regulating activity was determined by increasing the length of the stem and root of the seeds exposed to the test substance in comparison with the control. The measurement results were subjected to statistical processing. The data obtained are presented in table 1.

Table 1 The test results of the claimed compounds for growth-regulating activity on seedlings of sunflower Test object Concentration,% 10 ^-2 10 ^-3 10 ^-4 10 ^-5 BUT B BUT B BUT B BUT B The claimed compound I Root / hypocotyl 78/124 13/43 ^* 78/91 13/5 88/113 28/30 ^* 82/103 19/18 ^** The control 69/87

And - the average length of the root / hypocotyl, mm;

B - an increase in the length of the root / hypocotyl,%;

The differences are significant

^* - at P = 0.95;

^** - at Р = 0.90.

Subsequently, the growth-regulating activity of the synthesized compound was determined under the conditions of a shallow field experiment using the TsINAO method. A well-known growth regulator of potassium humate V.R. 20-25 g / l was selected as a reference (List of pesticides and agrochemicals permitted for use in the Russian Federation. Appendix to the journal "Plant Protection and Quarantine", 2002, No. 6). The standard was used in the recommended amount of 250 ml / ha for sunflower in the phase of 2-3 leaves.

Sunflower plants of the VNIIMK-8883 cultivar in the 2-3 leaf phase were treated with an aqueous solution of the synthesized compound in an amount of 200 g / ha and a potassium humate solution in an amount of 250 ml / ha with a working fluid flow rate of 300 l / ha. The experimental plot area is 5 m ² , the repetition in the experiments is fivefold. Harvesting of sunflower seeds was carried out during the period of complete ripening of seeds.

Rosteregulatory activity was determined by increasing the yield of grain processed by the proposed method and the standard method of plants in comparison with the control (untreated plants). The results are presented in table 2.

table 2 Test results of the synthesized compound as a growth regulator on sunflower An object Dose g (ml) / ha Productivity, t / ha Increase in control c / ha % Proposed 200 35.9 6.95 24 Reference 250 31,2 2.25 7.7 The control - 28.95 - -

Thus, the present invention implements the specified purpose, providing an increase in sunflower harvest of 6.95% c / ha (24%), while the standard helps to increase productivity by 2.25 c / ha (7.7%).

Claims (1)

A method for increasing sunflower yield, comprising treating vegetative plants with N-methyl-N-hydroxyethyl-n-toluylsulfonylamide in an amount of 200 g / ha.