Means to increase the cold hardiness of plants

 

(57) Abstract:

The invention relates to agriculture and can be used in crop production. As a means to improve the cold resistance of plants using thidiazuron (N-phenyl-N'-(1,2,3-thiadiazole-5-yl)urea] formula

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The invention improves the efficiency of plant growth at low temperatures. table 1.

The invention relates to agriculture and can be used in crop production when growing plants.

Crops are subject to late spring frosts and frequent lowering the temperature, which result in plant productivity is reduced to 50% (see: Korovin, A. I. General regularities of the influence of low temperatures and soil frost at the beginning of vegetation on mineral nutrition and the efficiency of fertilizer //Resistance of plants to low positive temperatures and frost and ways of its improvement. M., 1969. S. 144-152). This is mainly because of violation of physiological processes at the level of cells and plants in General (see: Thurlow O. A., Lukatkin A. C. Tissue and cellular aspects of cold hardiness and cold damage theplay increase the cold hardiness of plants: optimization of mineral nutrition, hardening of plants and seeds, processing of crops and seeds substances that enhance their cold. Known seed soaking and treatment of crops with trace elements (manganese, molybdenum) and growth regulators (auxins, gibberellins, retardants) (see: Deeva B. N. Role of physiologically active substances in the regulation of adaptive responses of individual genotypes to adverse environmental factors /Regulators of growth and development of plants. Kyiv. 1989. S. 214). Disadvantages are the limited scale of their production, and cost.

Well-known drug of cytokinin type Kinetin, which increases the cold plants (see: Thurlow O. A. determine the effectiveness of growth regulators to improve the cold tolerance of thermophilic plants //Agrochemistry. 1997. 2). Disadvantages are low solubility in water, high concentrations used in the processing, the high cost.

Revealed that the substances of General formula

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it is proposed to use as a means for regulating the growth of plants (patent of the USSR 555824, class A 01 N 5/00: A 01 N 9/20, 27.06.1977).

It is known to use the water solution drop - N-phenyl-N'-(1,2,3-thiadiazolyl-5)-urea to increase yield and berry crops. For this is about the complete wetting (and.with. The USSR 1323073, class A 01 N 47/36, 15.07.1987).

The known method of preparing planted fruit and berry crops for grafting with the use of the defoliant of Droppa - N-(1,2,3-thiadiazolyl-5-)-N-prilocaine in concentrations of 0.005-0.01%. Through the use of an aqueous solution of the drug was increased output that is taking root cuttings and improved their quality. This increased the output of planting material per unit area of the nursery and cultivation facilities.with. 1371674, class A 01 N 47/36, 04.03.1985).

The technical effect is to increase the efficiency of plant growth at low temperatures, improved cold hardiness.

The invention consists in the application of thidiazuron (N-phenyl-N'-(1,2,3-thiadiazole-5-yl)urea] formula

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as a means to increase the cold hardiness of plants.

Thidiazuron is known as a defoliant (see: List of chemical and biological means of pest control, plant diseases and weeds that are permitted for use in agriculture, 1996-1999 M., 1997). Thidiazuron in low concentrations shows cytokinine properties (Baskakov, Y. A., Zhirmunskaya N. M., Shapovalov, A. A. //Agrochemistry. 1982, 8, S. 124-129.)
the rd 37 on the basis of the methodology VIR (see: Diagnosis of plant resistance to stress. L.: 1988. S. 79). Seeds of cucumbers grooved, were soaked in solutions of the drug Thidiazuron concentration of 10-11, 10-10, 10-9M for 8 hours and Then kept at low temperature (14oC). Counting the number of germinated seeds, then spent the mathematical processing of the results obtained (table).

It is revealed that all tested concentrations of thidiazuron significantly increased the germination of cucumber in cold areas, and the most effective was 10-11M

In terms of small plot of experiment was carried out trials of the drug in order to identify its effect on the cold cucumber plants varieties Unity. For this, seeds and/or plants in phase 3 leaves were treated with a solution of thidiazuron in concentrations of 10-10-10-8M served as Control seeds, soaked in tap water. Seeds were sown on plots with an area of 4 m24-fold repetition in two periods, early and optimal. Processing of crops was carried out according to generally accepted for breeding technologies.

It is found that due to exposure to plant early sowing date under adverse low temperatures (+2, +3o(C) control options is>/P>Drug use Thidiazuron in order to improve the cold tolerance of plants can be promising in all climatic zones, especially with a cold climate in the mountains, a protected ground for energy cost savings and accelerate the germination of plants. Form of application of the aqueous solution.

The use of thidiazuron (N-phenyl-N'-(1,2,3-thiadiazole-5-yl)urea] formula

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as a means to increase the cold hardiness of plants.

 

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FIELD: agricultural production, in particular, plant growing.

SUBSTANCE: apparatus has device for measuring area of stem section and working tools. On the basis of measurements, voltage supplied to working tools is adjusted. Optimal conditions are created for plant treatment regardless of diameter of stems. Also, power consumption is reduced owing to employment of end switches adapted for automatic switching-off of power units of working tools in case of "idle stroke".

EFFECT: increased efficiency and reduced power consumption.

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