METHOD FOR GRAIN SORGHUM CULTIVATION Russian patent published in 2009 - IPC A01B79/02 

FIELD: agriculture.

SUBSTANCE: method includes forecrop harvesting, forecrop primary tillage, organic manuring and fertiliser dressing. Basic soil processing is performed, early spring casing harrowing is carried out, upper layer is cultivated from 0.06 to 0.08 m deep, soil herbicides are applied, seedbed is subject to preplanting cultivation up to 0.04-0.06 m deep. Seeding is performed at the temperature of upper soil layer ranging from +14 to 16°C. Soil is rammed before and after seeding, seeds being processed with insecticides. Row ripping, vegetative irrigation, foliage spraying, preharvesting crop desiccation is performed. To obtain predicted crop yield of group of average early ripening grain sorghum variety being 7 tons/ha, wide-row sowing of sorghum seeds is applied with germination number ranging from 300 to 350 thousand of viable seeds per hectare. N₁₄₀P₁₀₀K₅₀ is dosed with irrigation water: during "seedlings-tillering" inter-stage period dose being from 7 to 12% N, 15-20% P, 3-5% K, during "stem elongation-paniculation" inter-stage period dose being 50-58% N, 20-30% P, 20-25% K, during "blooming-milk-wax ripeness" inter-stage period dose being 30-43% N, 50-65% P, 70-77% K. To obtain predicted crop yield of 8 tons/hectare sorghum seeds are sown with germination number ranging from 350 to 450 thousand of viable seeds per hectare. N₁₆₀P₁₂₀K₇₀ is dosed with irrigation water: during "seedlings-tillering" inter-stage period dose being from 17-22% N, 25-30% P, 13-15% K, during "stem elongation-paniculation" inter-stage period dose being 45-50% N, 35-45% P, 30-35% K, during "blooming-milk-wax ripeness" inter-stage period dose being 28-38% N, 25-40% P, 50-57% K. To obtain predicted crop yield of 9 tons/hectare wide-row sowing of sorghum seeds is applied with germination number ranging from 400-500 thousand of viable seeds per hectare. Nutrition macro-elements N₁₈₀P₁₄₀K₉₀ are dosed with irrigation water: during "seedlings-tillering" inter-stage period dose being from 27-32% N, 35-45% P, 15-23% K, during "stem elongation-paniculation" inter-stage period dose being 40-45% N, 45-50% P, 35-45% K, during "blooming-milk-wax ripeness" inter-stage period dose being 23-33% N, 5-20% P, 40-42% K. Irrigation schedule of 70-80-70% HB is maintained until "paniculation" stage being 70% HB in the layer 0-0.4 m, during the rest period of vegetation up to beginning of grain formation HB is kept 80-70% in the layer 0-0,7 m.

EFFECT: method ensures to obtain harvest of grain sorghum seeds with substantially decreased fertiliser quantity.

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