• • • Seeding rate for alfalfa as monoculture or binary grass mixture on the Tersko-Sulak Caspian Lowland
Experiments aimed at testing the effectiveness of pure and binary sowings of alfalfa and maize for green feed, performed after main harvesting, on meadow-chestnut soil with high loam content on the Tersko-Sulak Caspian Lowland. Seeding rate of alfalfa made up 166 pcs. m-2 for monoculture, being 143 in the second year and 110 — in the third year. Binary sowing had reduced seed number by 10.0, 5.4 and 6.4%, respectively. Productive shoot number decreased by 3.9%, weight of 10 shoots — by 1.5%. Hay yield of alfalfa in mixtures reduced by 2.4% in the second year and by 5.7% in the third year, compared to monoculture.
Total hay yield of alfalfa in binary mixtures dropped by 0.9 t ha-1, compared to the pure sowing. Increasing seeding rate of alfalfa from 5.0 to 7.5 and 10.0 million pcs. ha-1 led to hay yield rise under coverless sowing. Values in the 1st year were 18.0 and 36.1% (monoculture), 20.7 and 39.6% (binary mixture) and in the 2nd year — 18.2 and 38.6% and 22.9 and 38.6%, respectively. Binary sowings improved yield of feed units per ha by 35.3% and feed-protein units — by 6.1%.
Source: http://kormoproizvodstvo.ru/en/archive/8-2018/, p. 27
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