Control of lodging and reduction in plant length in rice (Oryza sativa L.) with the treatment of trinexapac-ethyl and sowing density

Authors : Rasim ÜNAN, İsmail SEZER, Mevlüt ŞAHİN, Luis A. J. MUR

Pages : 257-264

Doi:10.3906/tar-1207-72

View : 15 | Download : 7

Publication Date : 2013-06-01

Article Type : Research Paper

Abstract :In this study, the effects of the plant growth regulator trinexapac-ethyl insert ignore into journalissuearticles values(TE); combined with different sowing densities on field-grown rice insert ignore into journalissuearticles values(Oryza sativa L.); plant length, lodging, and grain yield were evaluated over 2 growing seasons. Two different rice cultivars insert ignore into journalissuearticles values(Karadeniz and Osmancik-97);, 3 different sowing densities insert ignore into journalissuearticles values(400, 500, and 600 seeds m-2);, and 4 different doses of TE insert ignore into journalissuearticles values(0, 100, 200, and 300 g ai ha-1); were compared. The experiments were designed in a randomized block design in factorial ordering with 3 replicates. An increase in sowing density led to an increase of lodging, but it did not have a significant impact on plant length and grain yield. There was a significant correlation between lodging and plant length. A sowing density of 500 seeds m-2 is the optimum value among all sowing densities, and the highest yield was obtained from Osmancik-97 among all the cultivars. Irrespective of genotype and sowing density, treatments with 100 and 200, but not 300, g TE ai ha-1 increased rice yield. All doses of TE reduced lodging and plant length. By regression analyses, the optimal TE dose was predicted to be 170 g ha-1.
Keywords : Key words Lodging, plant length, rice Oryza sativa L, , sowing density, trinexapac ethyl, yield