METHOD FOR RICE CULTIVATION USING INTRA-SOIL DRIP IRRIGATION Russian patent published in 2022 - IPC A01G22/22 

FIELD: agriculture.

SUBSTANCE: invention relates to the field of agriculture. The method for rice cultivation consists in treatment with soil herbicides after sowing rice, spraying with contact herbicides, drip irrigation, maintaining soil moisture, fertilizing. Rice is cultivated on the lands of the irrigated rice fund with underground drip irrigation, previously in the first year of rice cultivation in autumn, after harvesting the predecessor, one-time cutting and restoration of peripheral bay grooves with a depth of 0.4-0.6 m, leveling of the surface of bays, basic tillage to a depth of 0.25-0.30 m, cleaning of irrigation and discharge channels, filling of check bunds up to the design marks. In the spring of the first year of implementation of the method, the main path and underground drip hoses and/or tapes are laid to a depth no higher than the middle of the root system of rice crop rotation crops and the depth of tillage for up to eight years inclusive. The step between the drainage outlets of the underground drip hose and/or tape is 33 cm, with the diameter and thickness of the walls of the drip hose and/or tape of 16 mm and 1.2 mm, respectively. The distance between the drip hoses and/or tapes is 20 cm. Next, an annual spring-autumn technological cycle of work is performed, including: loosening or chiseling to a depth of 0.16-0.18 m, disking with simultaneous application and sealing of organic fertilizers to a depth of 0.10-0.12 m with a rate of 40-50 tons per 1 ha of manure or green fertilizer, cultivation with harrowing with simultaneous application of micronutrients 5-6 days before sowing rice seeds, normally N₁₅₀P₅₀K₄₀, kg of active fraction/ha, to a depth of 0.10-0.12 m, leveling and rolling of the soil surface, pre-planting irrigation before planting rice with a norm providing soil moisture content of 90% of the lowest moisture capacity in a layer of 0.6 m, soil surface treatment with soil herbicides, etching of rice seeds with systemic fungicides and a growth regulator, followed by rice sowing with a norm providing 7 million germinating seeds per 1 ha, drip irrigation of rice through an underground drip irrigation system throughout the growing season, hose and/or tape drainage, l/h per 1 m, it is taken from the condition of ensuring a constant soil moisture content of 80% of the lowest moisture capacity in a layer of 0.4 m, feeding rice plants: the first is when rice leaves appear at the rate of 8 mg of nitrogen per 1 plant, the second is in the phase of 2-3 leaves at the rate of 10 mg of nitrogen per 1 plant, the third is in the phase of 4-5 leaves at the rate of 12 mg of nitrogen per 1 plant, in the phase of 7-9 leaves at the rate of 12 mg of nitrogen per 1 plant, triple spraying of rice with biologically active substance in phases 2-3, 6-7 leaves and at the end of the tillering phase before the start of the exit phase into the tube, the processing of rice crops: pesticides from the phase of 2 leaves to the tillering phase with an interval of 10-15 days with pre-moistening of the soil to 100% of the lowest moisture capacity in a layer of 0.4 m, insecticides during the growing season when pests exceed the economic threshold of harmfulness, twice fungicides in the phase of entering the tube and again after 20-25 days, senification and desiccation of rice crops, harvesting rice, pre-planting irrigation before planting associated crops of rice crop rotation through an underground drip irrigation system with the introduction of mineral fertilizers, growing seedlings and/or planting associated rice rotation crops with the introduction of mineral fertilizers, treatment of crops with pesticides, fungicides and insecticides, drip irrigation of rice rotation crops through an underground drip irrigation system during the growing season, harvesting rice rotation crops. Next, scuffing is carried out in two tracks to a depth of 0.06-0.08 m, the main tillage to a depth of 0.25-0.3 m. After which the annual spring-autumn technological cycle of work is repeated.

EFFECT: invention provides an increase in the yield, productivity of rice, improvement of the reclamation condition of soils, reduction of irrigation norms, labor intensity and cost of rice production.

1 cl, 3 dwg, 4 tbl