EFFICIENCY OF USE OF HYBRID SOREL IN VARIOUS MOWING MODES AND APPLICATION OF FERTILIZERS

   This article presents the results of studies on the different mowing modes of hybrid sorrel on different backgrounds: with and without mineral fertilizers. The negative effect of early and frequent mowing of grass sorrel is shown, optimal harvesting modes are recommended: annually in the flowering phase or when harvesting periods alternate over years in the phases “budding - fruiting - flowering”. With annual harvesting in the flowering phase, the yield of green mass was  68 % higher than when mowing in the stem phase. An economic and energy assessment of the considered regimes of mowing crops and fertilizer application was given. The profitability level for mowing in the flowering phase and alternating mowing periods “budding - fruiting - flowering” amounted to 111 and 91 %, respectively, and the gross energy yield was 76.6-89.4 GJ/ha. The annual application of higher doses of fertilizer to these crops during these periods (N 180 P 180 K 180 ) is economically unjustified; the use of  N90P90K90  is only 30-48 % profitable.

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