RU2765082C1 - Method for foliar feeding of rice agrocenosis with zinc-containing fertilizer in the conditions of kuban - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: invention relates to the field of agriculture, in particular to methods of growing rice. The method includes a preliminary study of rice for zinc content, ranking it into three groups with different zinc content and determining the need to treat rice with a 1.0% aqueous solution of zinc, depending on the zinc content in it. Vegetative rice plants in the tillering phase are analyzed for their zinc content after dry ashing at 525±25°С by the atomic absorption method and rank them into three groups. The first group includes plants containing less than 35 mg/kg zinc of aboveground dry weight; to the second - 35-45 mg/kg. The third group includes plants containing more than 45 mg/kg of zinc aboveground dry weight. If rice plants contain less than 45 mg / kg zinc, then foliar feeding is carried out with a 0.1% aqueous solution of zinc with a working solution consumption of 300 l/ha.

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

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).

A method is also known, including a preliminary study of rice for zinc content, ranking it into three groups with different zinc content and determining the need to treat rice with a 1.0% aqueous solution of zinc, depending on the zinc content in it (RF patent No. 2726553, 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 zinc, since an excess of zinc in rice plants significantly reduces the germination energy, which significantly reduces the yield of rice, as well as unjustified consumption of zinc-containing fertilizers.

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

The technical result is achieved by the fact that in the method of foliar top dressing of rice agrocenosis with zinc fertilizer in the conditions of the Kuban, including a preliminary study of rice for zinc content, ranking it into three groups with different zinc content and determining the need to treat rice with a 1.0% aqueous solution of zinc, depending on the content zinc in it, according to the invention, vegetative rice plants in the phase of its tillering are analyzed for their zinc 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 35 zinc mg/kg aboveground dry matter; to the second - 35-45 mg / kg; the third group includes plants containing zinc more than 45 mg/kg of above-ground dry weight, if rice plants contain zinc less than 45 mg/kg, then foliar top dressing is carried out with a 0.1% aqueous solution of zinc with a working solution consumption 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 zinc, it provides an increase in yield and a reduction in the consumption of zinc-containing fertilizers.

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 zinc-containing 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 zinc, varieties belonging to the same ripeness group - mid-ripening, but with different ecological plasticity, were used. 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 zinc in the soil, which was achieved by applying zinc-containing fertilizer for three years before sowing rice at the rate of Zn ₀ , Zn ₃ and Zn ₆ according to a.i. Mobile zinc 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 zinc fertilizer, plants were selected from each experimental plot and the zinc 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 zinc less than 35 mg/kg above-ground dry weight; to the second - 35-45 mg / kg; the third group included plants containing zinc more than 45 mg/kg of above-ground dry weight, if rice plants contain zinc less than 45 mg/kg, then foliar top dressing is carried out with a 0.1% aqueous solution of zinc with a working solution consumption of 300 l/ha.

An example of a specific implementation of the proposed method

Rice was sown in the ordinary way, the seeding depth 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 zinc fertilizer (ZnSO ₄ × 7H ₂ O containing 21-23% Zn) was carried out with a 0.1% aqueous solution of the microelement. The consumption of the working solution was 300 l/ha. Before foliar fertilization of rice agrocenoses with zinc fertilizer, plants were selected from each experimental plot and the content of the microelement of the same name was determined. Zinc 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 zinc in plants (table 2).

A direct dependence of the yield of rice during foliar fertilization of rice agrocenosis with zinc fertilizer on the content of the same microelement in plants in the tillering phase (r≈0.81-0.84) has been established.

Reliable increases in the yield of rice grains are obtained by foliar feeding of plants with zinc under conditions of low and medium zinc content in the above-ground organs in the tillering phase. Therefore, in order to establish the need for foliar feeding of rice agrocenosis with zinc fertilizer and the expected effect of this agricultural method, it is necessary to be guided by the data of chemical analysis on 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 zinc-containing fertilizer in Kuban conditions, including a preliminary study of rice for zinc content, ranking it into three groups with different zinc content and determining the need to treat rice with a 1.0% aqueous solution of zinc, depending on the zinc content in it, characterized in that vegetative rice plants in the tillering phase are analyzed for their zinc 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 zinc less than 35 mg / kg above-ground dry mass; to the second - 35-45 mg / kg; the third group includes plants containing zinc more than 45 mg/kg of above-ground dry mass, if rice plants contain zinc less than 45 mg/kg, then foliar feeding is carried out with a 0.1% aqueous solution of zinc with a working solution consumption of 300 l/ha.