RU2093517C1 - Coordination manganese (ii) compound having properties of cotton plant growth stimulant - Google Patents

Abstract

FIELD: agriculture. SUBSTANCE: present invention describes pyridine derivatives, more particularly coordination manganese (2) compound of empirical formula:

Description

обладающему свойствами регулятора роста растений (повышающего продуктивность хлопчатника ).The invention relates to pyridine derivatives, namely, to the coordination compound of gross manganese formula

possessing the properties of a plant growth regulator (increasing the productivity of cotton).

 The specified property suggests the possibility of using it in agriculture.

 The proposed compound is not described in the literature.

The closest analogues in action and structure are:
1. The drug A-1-standard recommended by the State Commission for its use to increase cotton productivity.

 The standard in its biological activity is significantly inferior to the claimed compound. Processing plants of fine-fiber cotton leads to a decrease in the intensity of transpiration of leaves by 20.4%, thereby the proposed compound increases the resistance of plants to extreme growing conditions, as a result, the falling of fruit elements (buds, flowers) decreases by 11.6%, which contributes to an increase in the yield of raw cotton by 5.2 c / ha in comparison with the standard.

 2. Succinic acid (analogue 1), is used in agriculture to increase the productivity of various crops.

 The claimed compound in its biological activity is much more active than the analogue. The proposed compound in comparison with the analogue leads to a decrease in the transpiration rate of plant leaves by 22.1%, reduces the percentage of decay of fruit elements (buds, flowers) by 16.6% and increases the yield of raw cotton by 6 c / ha.

 3. Kapanin is recommended as a plant growth regulator to increase the yield of vegetable plants.

The inventive compound has several advantages over the analog. The analogue is less available due to limitations in the feedstock, more expensive and more toxic. So, the LD value of ₆₀ known and proposed compounds, respectively, 340 and 1150 mg / kg of live weight. In its biological activity, the claimed compound is superior to the analogue. The treatment of cotton plants with the claimed compound led to an improvement in water exchange, reduced water deficit by 1.8% compared to the analogue. The plants treated with compound I maintained a good water value. This was facilitated by a decrease in transpiration rate by 21.2%. Treatment of plants with compound I regulated the generative organs, promoted the accumulation of fruit elements, in the variant with compound I it was 13.0% higher than that of the analogue. From the use of the claimed compounds, the cotton yield increased by 4.6 c / ha in comparison with the analogue.

 The purpose of the invention is the synthesis of a new highly effective and environmentally friendly plant growth regulator with high biological activity and low toxicity to humans and warm-blooded.

Предлагаемое соединение устойчиво при хранении, растворимо в воде, не гигроскопично и не взрывоопасно.This goal is achieved by the synthesis of coordination compounds of manganese, gross formula I:

The proposed compound is stable during storage, soluble in water, not hygroscopic and not explosive.

 The gross formula of the claimed compound is confirmed by elemental analysis and IR spectra recorded on a SpEKORD-M-80 spectrophotometer.

The presence of absorption bands in the spectra of the claimed compounds at: 1218 cm ^-1 (νNO); 835 cm ^-1 (βNO); 1025 cm ^-1 (γCN); 3405 cm ^-1 (νOH); 1625 cm ^-1 (νC = C); 945 cm ^-1 (βCH ₂ ) suggests this structure.

 Example 1. A method of obtaining a complex.

In a two-necked reactor with a capacity of 1 l, equipped with a dropping funnel and reflux condenser, dissolve 197.8 (1 mol) of four-water manganese chloride in 400 ml of ethanol (methanol), to which a solution of 95 g (1 mol) N is added at 25-35 ^o C -pyridine oxides per 150 ml of ethanol (methanol). The reaction mass is heated to boiling, the solvent is evaporated, the residue is washed with 5 • 50 ml of ether. The yield of the complex compound of formula I, 231.7 g (97%), crystallizes from methanol, the compound decomposes upon heating.

Found C 25.4 H-3.1; N-5.9; Cl-29.4; C ₅ H ₇ No ₂ Cl ₂ Mn.

 Calculated, C-25.3; H-2.95; N-5.86; Cl-29.68.

 Example 2. The effect of the drug on the water regime and yield of fine fiber cotton.

 The venue of the experience of the state farm "Kyrgyzstan" Ilchevsky district of the Tajik SSR. Field experience.

Object of research: fine-fiber cotton, grade 9883-4
Processing method. Cotton plants were sprayed in the flowering phase with aqueous solutions of drugs in the morning. The flow rate of the working solution is 500 l / ha.

Area 50 m ² , fourfold repetition. In the control variant, the plants were sprayed with water. The experimental design and results are shown in the table.

 Plants growing under irrigation conditions have low adaptive potential. Weak changes in the water regime cause quite impressive metabolic and productive effects.

 The treatment of plants with the proposed substance causes positive changes in the water regime of plants.

 Under the influence of drugs on plants, the water content increased and the moisture deficit decreased from 24.0 to 15.6% (table). This was due to the limitation of transpiration intensity.

The transpiration rate in the experimental variants decreased from 1330 (control) to 1781 mg / cm ² h (table). Perhaps the oral regulation of transpiration in the treated plants by the proposed substance was more rational and the leaves are more protected from stress.

 Plants treated with the proposed compound consume less water, while the amount of tightly bound water increases in leaves and mobility decreases, the water-holding capacity of leaf tissues increases, and the flow of water over its consumption predominates.

 The proposed compound tendentiously increases the resistance of cotton to stress under extreme growing conditions, thereby reducing the fall of fruit elements by 12.4% in comparison with the control (table).

 Improving the water exchange in the leaves, normalizing the physiological processes that cause the accumulation of fruit elements on the cotton bush, the proposed compound contributed to an increase in the yield of raw cotton (table).

 The harvest of raw cotton as a result of the use of the claimed compounds increased by 5.3 c / ha in comparison with the control.

 Example 3. Acute toxicity of the compound.

Acute toxicity of the compound was determined on white mice, males and females weighing 19-21 g with an oral route of administration of aqueous solutions. As indicators of toxicity, the LD ₅₀ value was taken as a lethal dose, expressed in mg / kg of animal weight.

 Accounting for the death of animals was carried out 24 hours after administration of the drug.

 The results of the experiments were statistically processed according to the method of Litchfield and Wilcoxon in the modification of Roth 7.

It was found that the claimed compound belongs to the group of low-toxic compounds LD ₆₀ it amounted to 1150 mg / kg

The technical and economic effectiveness of the proposed solution is as follows:
a new compound is synthesized that has the properties of a plant growth regulator with a more stimulating activity than the standard and analogues;
the proposed connection provides:
a) improvement of the water regime of cotton, as a result of which the fall of fruit elements is reduced;
b) an increase in the yield of raw cotton by 5.3 c / ha in comparison with the control, by 5.2 c / ha in comparison with the standard;
the economic effect of the use of the proposed compounds increases;
the estimated volume of implementation may be 10,000 ha.

Claims (1)

Gross coordination compound Mn (II) of the formula

obtained by the interaction of four-water manganese chloride and pyridine N-oxide at 25 35 ^o C in an alcohol environment at a molar ratio of 1 1 respectively, showing the property of a cotton growth promoter.

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