اثرات مصرف کود روی بر عملکرد و اجزای عملکرد ارقام گندم

In order to study on response of wheat cultivars to application of zinc fertilizer, an experiment was carried out in split plot design based on randomized complete block design with three replications in 2008-2009 in Agricultural Research Station of Jolgeh-Rokh (Torbat-heydarieh). Fertilizing treatments at 4 levels i.e.: without fertilizing of zinc sulphate (check- F1), foliar application with using of zinc sulphate fertilizer at rate of 5/1000 at booting and milk stages (F2), foliar application with using of Omex1 (F3) and Omex2 (F4) fertilizers at booting and milk stages and cultivar treatments in 10 levels i.e.: Gaspard, Azar2, Navid, Sabalan, C-81-10, Gascogen, Mahdavi, Bezostaya, Alvand and Zarin were considered as main and sub plots, respectively. Results showed that fertilizing time was significant on number of spikes per square meter (NS/M2), thousand kernels weight (TKW) and grain yield. The maximum and minimum of grain yields obtained from F4 (8901 kg/ha) and F1 (8267 kg/ha), respectively. The effect of cultivar was significant on NS/M2, number of kernels per spike (NG/S), TKW, biological yield, grain yield, and harvest index. The maximum and minimum of grain yields obtained from Gascogen cultivar (10019 kg/ha) and Sabalan cultivar (7130 kg/ha), respectively. The higher grain yield of Gascogen was related to more TKW and NS/M2. The less grain yield of Sabalan was related to less NS/M2 and NG/S.