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

Unan R., Sezer İ., Sahin M., Mur L. A. J.

TURKISH JOURNAL OF AGRICULTURE AND FORESTRY, cilt.37, sa.3, ss.257-264, 2013 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 37 Sayı: 3
  • Basım Tarihi: 2013
  • Doi Numarası: 10.3906/tar-1207-72
  • Dergi Adı: TURKISH JOURNAL OF AGRICULTURE AND FORESTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
  • Sayfa Sayıları: ss.257-264
  • Anahtar Kelimeler: Lodging, plant length, rice (Oryza sativa L.), sowing density, trinexapac-ethyl, yield, YIELD
  • Ondokuz Mayıs Üniversitesi Adresli: Evet

Özet

In this study, the effects of the plant growth regulator trinexapac-ethyl (TE) combined with different sowing densities on field-grown rice (Oryza sativa L.) plant length, lodging, and grain yield were evaluated over 2 growing seasons. Two different rice cultivars (Karadeniz and Osmancik-97), 3 different sowing densities (400, 500, and 600 seeds m(-2)), and 4 different doses of TE (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).