METHOD FOR CULTIVATION OF PERENNIAL MEADOW GRASSES, MAINLY DEVIL'S GRASS, ON ESTUARIES OF CASPIAN PLAIN Russian patent published in 2009 - IPC A01B79/02 

FIELD: agriculture.

SUBSTANCE: in method main treatment of soil is carried out without bed turnover for the depth of 0.12-0.15 m, preplant treatment of upper layer by bed milling for the depth of 0.08-0.12 m, area surface is smoothened, mineral fertilisers are superficially introduced - N₃₀P₆₀K₆₀ in kg d.v./ha. Chemical substances are introduced to fight weed plants, devil's grass seeds are sown to the depth of 0.02-0.03 m with norm of (3.0-3.5)×10⁶ pieces of germinable seeds/ha. Pre- and post-planting smoothening is carried out, as well as additional fertilising in the next year in frozen-thawed soil with nitrogen fertiliser with norm of 30-40 kg d.v./ha. Stubble is combed out, upper soil layer is mulched. Area is flooded with flood water with norm of 2000-2500 m³/ha, weed plants are removed by mowing of crop at cutting height of 0.10-0.15 m, at cut height of 0.06-0.08 m mowing is done with grass height of 0.6-0.7 m of pure sowing in spreading, grass is raked in a swath, and is removed for hay. In period of autumn tillering, mineral fertilizers N_30-45P_40-60K_40-60 are introduced in kg d.v./ha, at the third year of plants life nitrogen fertilisers are introduced in March into frozen-thawed soil with norm of 30-45 kg d.v./ha. Stubble is removed in the third decade of March - the first decade of April, and upper layer of soil is mulched, area is flooded with flood water with norm of 2500-3500 m³/ha. In the third decade of July harvesting is carried out by means of separate combining, as well as devil's grass ears thrashing in phase of waxy ripeness of seeds. At the same time at the third year of plants life in the third decade of March after removal of stubble at the angle of 10-50° in direction of sowing with pitch of 0.3-0.5 m, slots are cut with width of 4-6 mm for depth of 0.10-0.16 m.

EFFECT: method provides for improved seed productivity of devil's grass on irrigation-developed estuaries watered by means of flooding.

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