Farklı Doz ve Zamanda Uygulanan Ethephon'un Arpa Hordeum vulgare L. Tane Verimine Etkisi

1997-1999 y ı lları aras ı nda Ankara Üniversitesi Ziraat Fakültesi Tarla Bitkileri Bölümü deneme tarlas ı nda yürütülen bu çal ışmada, farkl ı doz ve zamanlarda arpaya uygulanan ethephonun tane verimine etkileri incelenmi ştir. Denemede Tokak 157/37 ve Bülbül 89 iki s ı ral ı arpa çeşitleri ile Yı ld ı r ı m ve Ergine1-90 alt ı sı ral ı arpa çeşitleri kullan ı lmışt ı r. Ethephon uygulamalar ı sapa kalkma, başaklanma öncesi ve çiçeklenme sonu dönemlerinde O, 15, 30, 45 ve 60 g/da dozlar ı nda uygulanm ıştir. Araşt ı rmada her iki deneme y ı l ı na ilişkin sonuçlar ayr ı ayr ı de'gerlendirilmi ştir. Araşt ı rma sonuçlar ı na göre; dört arpa çeşidine farkl ı doz ve zamanda ethephon uygulanmas ı yla tane verimi yönünden önemli farkl ı l ı klar saptanm ışt ı r Denemenin birinci y ı l ı nda en yüksek tane verimi Tokak 157/37 çe şidinden, ikinci y ı l ı nda ise Bülbül 89 çeşidinden elde edilmiştir. Her iki y ı lda başaklanma öncesinde 30 g/da ethephon uygulamas ı yla en yüksek tane verimleri elde edilmiştir.

Anahtar Kelimeler:

İki sıralı arpa, altı sıralı arpa, ethephon, tane verimi

Effects of Ethephon Applied at Various Doses and Time on Grain Yield of Barley Hordeum vulgare L.

The effects of ethephon applied at various doses and time on grain yield of barley were examined in this study carried out at the Experimental Field of the Department of Field Crops, Faculty of Agriculture, University of Ankara between 1997 and 1999. Tokak 157/37, Bülbül 89 cultivars of two-rowed barley, and six-rowed barley cultivars Yı ld ı rı m and Ergine1-90 were used in the experiment. O, 15, 30, 45 and 60 g/da ethephon doses were applied at shooting, booting and post-anthesis stages. The results regarding both years were evaluated separately for each growing season. According to the results of the research; significant differences were determined with the application of various doses and time of ethephon on four barley cultivars in regard to grain yield. The greatest grain yield was obtained from Tokak 157/37 cv. in the first year of experiment and the greatest grain yield was obtained from Bülbül 89 cv. in the second year of experiment. In both years, the greatest grain yields were obtained from the application of 30 g/da ethephon dose at before heading.

Keywords:

Two-rowed barley, six-rowed barley, ethephon, grain yield,

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