Grain Yield Response of Five New Rice Cultivars to Seeding Rate.

Cultivar by seeding rate studies assist in developing production recommendations for new rice (Oryza sativa, L.) cultivars to determine necessary seeding rates that cover a range of Arkansas production/growing conditions. The 2021 study examined 5 rice cultivars, CLL16, CLL17, DG263L, Jewel, and Lynx. Seeding rates of 10, 20, 30, 40, and 50 seed/ft² were used for each cultivar. Current production recommendations were utilized at each location, and all seed received insecticide and fungicide seed treatments. Studies were seeded at 3 research station locations across eastern Arkansas. Differences were observed for stand density among seeding rates; however, there were few grain yield differences and no differences in milling yields. In 2021, even the lowest seeding rates produced stand densities at or near the recommended stand density range to produce optimal grain yields. The possibility of reduced stand density and grain yield should be noted if seed treatments for insecticides and fungicides are not used. [ABSTRACT FROM AUTHOR]