EFFECT OF SOWING DATE AND SEEDING RATE ON THE NET PHOTOSYNTHETIC PRODUCTIVITY OF OIL FLAX VARIETIES

Abstract:This article examines the effect of sowing date and seeding rate on the net photosynthetic productivity of the Bahorikor and Lalmikor varieties of oil flax grown under rainfed conditions in the G‘allaorol district of Jizzakh region. The research was carried out at the experimental field of the Research Institute of Rainfed Agriculture located in the G‘allaorol district of Jizzakh region. The experiment employed three sowing dates (March 1-10, March 11-20, and March 21-30) and three seeding rates (3.5, 4.0, and 4.5 million seeds/ha). According to the research results, the highest net photosynthetic productivity was recorded in the Lalmikor variety at a seeding rate of 4.0 million seeds/ha within the March 11-20 sowing date, reaching 1.5 g/m²·day. In the Bahorikor variety, this indicator was 1.2 g/m²·day. The research results demonstrated that selecting the optimal sowing date and seeding rate for oil flax cultivation in rainfed areas is one of the key factors in increasing yield.