Influence of perennial forage crops on fertility and productivity of arable land in specialized irrigated crop rotations
The positive influence of alfalfa on the yield of agricultural crops of crop rotations sown in the formation and turnover of the plant was experimentally confirmed, in comparison with the yield of identical crops, the precursors of which were annual cereal-bean mixtures in non-zero-crop rotation. According to the results of the research, the advantage of two- and three-year-old alfalfa was revealed in comparison with the one-year-old one, after which the corn yield decreased by 11.6-15.9%, winter wheat - by 15.7 - 21.6% compared with its less long-term use. The positive influence of perennial alfalfa on the quality of crop production in comparison with annual cereal-bean mixtures has been confirmed. In general, the results of the studies confirmed the mandatory inclusion of long-term leguminous crops (alfalfa) in the alternation of crops of crop rotations in order to effectively use irrigated land.