Moyli zig‘ir navlarining quruq biomassa to‘plashiga ekish muddatlari va me’yorlarining ta’siri

Abstract

Based on research carried out in 2026 at the central experimental farm of the Research Institute of Rainfed Agriculture, the article analyzes the effect of different sowing dates (01–10.03; 11–20.03; 21–31.03) and seeding rates (3.5; 4.0; 4.5 million seeds/ha) on the dynamics of dry biomass accumulation in the oilseed flax varieties “Bahorikor” and “Lalmikor”. At all phenological stages, “Lalmikor” showed higher biological productivity and dry matter accumulation than “Bahorikor”, and the second ten-day period of March (11–20 March) proved to be the optimal sowing date for vigorous plant development. Among the seeding rates, the variants sown with 4.0 million viable seeds per hectare gave the highest dry biomass accumulation, whereas sowing delayed until the end of March and seeding rates below or above the optimum (3.5 and 4.5 million seeds/ha) reduced the intensity of dry matter accumulation. The study demonstrates that the optimal agrotechnical practice for obtaining high and good-quality yields of oilseed flax on rainfed lands is to sow the variety “Lalmikor” in mid-March (11–20.03) at a rate of 4.0 million viable seeds per hectare.