RU2766236C1 - Method for foliar dressing of rice agrocenosis with copper fertilizer in the conditions of kuban - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: invention relates to the field of agriculture, in particular to rice farming. The method includes a preliminary study of rice for copper content, ranking it into three groups with different copper content and determining the need to process rice with a 1.0% aqueous solution of copper, depending on the copper content in it. At the same time, vegetative rice plants in the tillering phase are analyzed for the copper content in them after dry salting at 525±25°С using the atomic absorption method and ranked into three groups. The first group includes plants containing less than 6.9 mg/kg of aboveground dry mass; the second group includes 6.9-7.1 mg/kg; the third group includes plants containing more than 7.1 mg/ kg of aboveground dry mass. If rice plants contain less than 7.1 mg/kg of copper, then foliar fertilizing is carried out with 0.1% aqueous copper solution with working solution consumption of 300 l/ha.

EFFECT: method provides an increase in rice yield and a reduction in the consumption of copper-containing fertilizers by determining the need for foliar treatment of vegetating rice plants with copper.

1 cl, 3 tbl, 1 ex

Description

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

A known method of growing rice, including foliar feeding of vegetative rice plants in the tillering phase with an aqueous solution of a mixture of copper sulfate with soda ash in a ratio of 1:1 at a consumption rate of 400 l/ha. The method allows to increase the yield by ensuring efficient processing of rice on meadow-chernozem soil (RF patent No. 2670150, class A01G 16/00, 2018).

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).

A method is also known, including a preliminary study of rice for copper content, ranking it into three groups with different copper content and determining the need to treat rice with a 1.0% aqueous solution of copper, depending on the copper content in it (RF patent No. 2733902, class A01G 16 /00, 2020 - prototype).

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

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

The technical result is achieved by the fact that in the method of foliar feeding of rice agrocenosis with copper fertilizer in the Kuban conditions, including a preliminary study of rice for copper content, ranking it into three groups with different copper content and determining the need for rice treatment with 1.0% aqueous copper solution depending on the content copper in it, according to the invention, vegetative rice plants in the phase of its tillering are analyzed for their copper content after dry ashing at 525 ± 25 ° C by the atomic absorption method and they are ranked into three groups: the first group includes plants containing less than 6.9 mg/kg aboveground dry matter; the second - 6.9-7.1 and the third group includes plants containing more than 7.1 mg / kg of aboveground dry mass, if rice plants contain copper less than 7.1 mg / kg, then foliar top dressing is carried out 0.1% -ny aqueous solution of copper 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 copper, an increase in yield and a reduction in the consumption of copper-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 claimed 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 copper fertilizer in the conditions of the Kuban is carried out as follows.

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

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 mobile copper in the soil, which was achieved by applying copper fertilizer for three years before sowing rice at the rate of Cu ₀ , Cu ₃ and Cu ₆ according to a.w. Mobile copper was extracted from the soil with an ammonium acetate buffer solution (AAB) with a pH of 4.8.

Before the foliar fertilization of rice crops with copper fertilizer, plants were selected from each experimental plot and the copper content was determined after dry ashing at 525±25°C by the atomic absorption method. Then they were ranked into three groups: the first group included plants containing less than 6.9 mg/kg aboveground dry matter; the second - 6.9-7.1 and the third group included plants containing more than 7.1 mg/kg above-ground dry mass. If rice plants contained copper less than 7.1 mg/kg, then foliar top dressing was carried out by treatment with a 0.1% aqueous solution of copper with a consumption of a working solution of 300 l/ha.

An example of a specific implementation of the proposed method

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 copper fertilizer (CuSO ₄ × 5H ₂ O containing 23-25% Cu) was carried out with a 0.1% aqueous solution of the microelement. The consumption of the working solution was 300 l/ha. Before the foliar fertilization of rice crops with copper fertilizer, plants were selected from each experimental plot and the content of the microelement of the same name was determined. Copper in plants was determined after dry ashing at 525±25°C by the atomic absorption method (table 1).

Regardless of the variety, the yield of rice grains increased with an increase in the content of copper 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 copper in conditions of low and medium copper content in the above-ground organs in the tillering phase. Therefore, in order to establish the need for foliar feeding of rice agrocenosis with copper 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 copper fertilizer in Kuban conditions, including a preliminary study of rice for copper content, ranking it into three groups with different copper content and determining the need to treat rice with a 1.0% aqueous solution of copper, depending on the copper content in it, characterized in that vegetative rice plants in the tillering phase are analyzed for their copper 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 6.9 mg / kg aboveground dry matter; to the second - 6.9-7.1 mg / kg; the third group includes plants containing more than 7.1 mg / kg of above-ground dry mass, if rice plants contain copper less than 7.1 mg / kg, then foliar feeding is carried out with a 0.1% aqueous solution of copper with a consumption of a working solution of 300 l / ha.