Biotech Studies 2016, Vol 25, Num, 2     (Pages: 131-136)

Effects Humic Acid Application at Different Stages of Growth on Yield and Yield Components of Winter Rapeseed Crops

Mehtap GÜRSOY 1 ,Farzad NOFOUZİ 2 ,Dilek BAŞALMA 2

1 Aksaray Üniversitesi, Güzelyurt Meslek Yüksekokulu, Aksaray
2 Ankara Üniversitesi, Ziraat Fakültesi, Tarla Bitkileri Bölümü, Ankara
DOI : 10.21566/tarbitderg.281879 Viewed : 780 - Downloaded : 497 The purpose of this study was to evaluate effects of durations of different doses of humic acids on yield and yield components of winter rapeseed. The study was carried out at Ankara, the experiment was established as split block design with three replications during 2013-2014. Cv. Bristol was used in the experiment. Humic acid doses of 0, 250, 500, 1000 ml/da were applied. Humic acid was applied at 6-8 leaves stage, bolting and flowering stages. In the study; plant height, number of branches on main stem, number of capsules per main stem, number of seeds per capsule, one thousand seed weight and seed yield were the parameters for which observations were taken. In all of the parameters, discussed in the results of the study statistically significant differences were noted between humic acid application stages and dose. The maximum plant height of 118.60 cm was noted at humic acid application at 6-8 leaf stage using 250 ml/da. The maximum number of 30.77 capsules were noted on main stem at when humic acid was applied at bolting stage using 500 ml/da humic acid. Thousand seed weight of 3.68 g was noted at 6-8 leaf stage on control treatment. Maximum seed yield (238.40 kg/da was noted at 250 ml/da humic acid application at 6-8 leaf stage. Generally, humic acid doses of 250 and 500 ml/da were more productive on all traits after their application at 6-8 leaves stage and bolting stage that resulted in better yields. Keywords : Rapeseed, humic acid, dosage, application time, seed yield