RU2786531C1 - Method for foliar dressing of rice agrocoenosis with a boron-containing fertiliser in the conditions of kuban - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: invention relates to the field of agriculture, in particular, to methods for rice cultivation. The method includes the stages of pre-testing the rice for the content of boron and ranking the rice into three groups with different boron content. To determine the need for treating the rice with a 1.0% aqueous boron solution, depending on the content of boron therein, vegetating rice plants in the tillering phase are used, subjected to dry ashing at a temperature of 525 to 25 ±°C in order to test the content of boron therein. The treated plants are then ranked into three groups: plants containing less than 3.35 mg/kg of dry top mass of the plants belong to the first group; 3.35 to 3.70 mg/kg - to the second group; and plants containing more than 3.70 mg/kg of dry top mass of the plants belong to the third group. If rice plants contain less than 3.70 mg/kg boron, foliar dressing is performed with a 0.1% aqueous boron solution with a working solution consumption rate of 300 l/ha.

EFFECT: increase in the yield of rice and reduction in the consumption of boron-containing fertilisers due to the need for foliar treatment of vegetating rice plants with boron being determined.

1 cl, 3 tbl, 1 ex

Description

The invention relates to the field of agriculture, in particular to methods for growing rice.

A method is known that includes foliar treatment of rice crops in the tillering phase (5-6 leaves) with an aqueous solution of cytovit fertilizer mixed with growth regulator epin-extra, at a dose of 50-200 ml/ha. The method allows to increase the viability of tillering shoots, their survival before harvesting, which contributes to the growth of grain yield (RF patent No. 2493695, class A01G 16/00, 2013). Fertilizer cytovit is balanced in terms of the content of macro- and microelements. Contains a complete set of nutrients, including boron. Cytovit is intended for soaking seeds and feeding plants. It accelerates seed germination and plant growth, increases their resistance to adverse growing conditions, reduces ovary fall, prevents the death of growth points, and also reduces the likelihood of disease in fed crops (see Sheudzhen A.Kh., Onishchenko L.M., Prokopenko V. B. Fertilizers, soils and plant growth regulators Maikop, GURIPP "Adygea, 2005, p. 355).

A method is also known, including a preliminary study of rice for boron content, ranking rice into three groups with different boron content and determining the need to treat rice with a 1.0% aqueous solution of boron depending on the boron content in it (RF patent No. 2745426, class A01G 1 /02, 2021 - prototype).

A common disadvantage for all known technical solutions is the inability to determine the need for foliar treatment of vegetative rice plants with boron, since an excess of boron in rice plants significantly reduces the germination energy, which significantly reduces rice yield, as well as unjustified consumption of boron-containing fertilizers.

The technical result is to increase the yield of rice and reduce the consumption of boron-containing fertilizers by determining the need for foliar treatment of vegetative rice plants with boron.

The technical result is achieved by the fact that in the method of foliar feeding of rice agrocenosis with boron-containing fertilizer in Kuban conditions, including a preliminary study of rice for boron content, ranking rice into three groups with different boron content, according to the invention to determine the need for rice treatment with 1.0% aqueous solution of boron depending on the content of boron in it, vegetative rice plants are used in the phase of their tillering, which are subjected to dry ashing at 525 ± 25 ° C to analyze the content of boron in them, then the treated plants are ranked into three groups: the first group includes plants containing less 3.35 mg/kg above ground dry weight; the second - 3.35-3.70 and the third group includes plants containing more than 3.70 mg / kg of above-ground dry mass, if rice plants contain boron less than 3.70 mg / kg, then foliar top dressing is carried out 0.1% -nym water solution of boron with a flow rate of the working solution of 300 l/ha.

The novelty of the proposed technical solution is due to the fact that by determining the need for foliar treatment of vegetative rice plants with boron, an increase in yield and a reduction in the consumption of boron-containing fertilizers are provided.

The features that distinguish the claimed technical solution from the prototype are aimed at achieving a technical result and have not been identified in the study of this and related fields of science and technology and, therefore, meet the criterion of "inventive step".

The inventive method is recommended to be used in agriculture for foliar feeding of vegetative rice plants, which meets the criterion of "industrial applicability".

The method of foliar feeding of rice agrocenosis with boron-containing fertilizer in the conditions of the Kuban is carried out as follows.

Vegetating rice plants in the tillering phase are analyzed for boron content after dry ashing at 525±25°C by the atomic absorption method and are ranked into three groups: the first group includes plants containing less than 3.35 mg/kg of above-ground dry mass ; the second - 3.35-3.70 and the third group includes plants containing more than 3.70 mg / kg of above-ground dry mass, if rice plants contain boron less than 3.70 mg / kg, then foliar top dressing is carried out 0.1% -nym aqueous solution of boron with a flow rate of the working solution of 300 l/ha.

An example of a specific implementation of the proposed method

To assess the response of rice plants to foliar feeding of crops with boron, varieties belonging to the same ripeness group - mid-ripening, but with different ecological plasticity, were used. This is Rapan - well adapted to environmental factors and technogenic Khazar variety.

The studies were carried out on alluvial meadow soil. Experimental crops were placed on three checks of one rice map, differing in the content of water-soluble boron in the soil, which was achieved by applying boron-containing fertilizer for three years before sowing rice at the rate of B ₀ , B ₂ and B ₄ according to a.w. The content of water-soluble boron in the soil was determined by the photometric method using quinalizarin.

Sowing of rice was carried out in an ordinary way, the depth of seed placement was 0.5-1.0 cm, the seeding rate was 7 million seeds per 1 ha, the irrigation regime was short flooding. Foliar fertilization of rice crops with boron fertilizer (H ₃ BO ₃ - boric acid) containing 17.5% boron was carried out in the tillering phase of plants with a 0.1% aqueous solution of the microelement. The consumption of the working solution was 300 l/ha. Before carrying out foliar fertilizing of rice crops with boron fertilizer, plants were selected from each experimental plot and the content of the same microelement was determined. Boron in plants was determined after dry ashing at a temperature of 525±25°C by the photometric method using quinalizarin (table 1).

Before foliar fertilization of rice crops with boron, they were ranked according to the content of the element of the same name into three groups: low-supplied (<3.35 mg/kg dry weight); average (3.35-3.70 mg / kg); high-supplied (>3.70 mg/kg). For carrying out foliar top dressing, ground equipment was used (table 2).

Regardless of the variety, the yield of rice grain increased with an increase in the content of boron in plants (table 2).

A direct dependence of the yield of rice with foliar fertilization of crops with copper fertilizer on the content of the same microelement in plants in the tillering phase (r≈0.79-0.81) has been established.

Reliable increases in the yield of rice grains are obtained with foliar top dressing of crops with boron under conditions of low and medium content in the above-ground organs in the tillering phase. Therefore, in order to establish the need for foliar feeding of rice agrocenosis with boron-containing fertilizer and the expected effect of this agricultural method, it is necessary to be guided by the data of chemical analysis for the content of the same microelement in the above-ground mass of plants in the tillering phase (Table 3).

Claims (1)

A method for foliar feeding of rice agrocenosis with boron-containing fertilizer in the Kuban conditions, including a preliminary study of rice for boron content, ranking rice into three groups with different boron content, characterized in that to determine the need for rice treatment with a 1.0% aqueous solution of boron, depending on the boron content in it is used by vegetative rice plants in the phase of their tillering, which are subjected to dry ashing at 525 ± 25 ° C to analyze the boron content in them, then the treated plants are ranked into three groups: the first group includes plants containing less than 3.35 mg /kg above-ground dry mass of plants; the second - 3.35-3.70 mg / kg and the third group includes plants containing more than 3.70 mg / kg of above-ground dry mass of plants; if rice plants contain less than 3.70 mg/kg of boron, then foliar top dressing is carried out with a 0.1% aqueous solution of boron with a working solution flow rate of 300 l/ha.