engleski

Response of winter wheat to ameliorative PK- fertilization and liming

The stationary field experiment was conducted in spring of 2004 on Pavlovac (Bjelovar- Bilogora County) very acid soil by the application of NPK 10:30:20 fertilizer as follows (kg ha-1): a = 0 (the conventional fertilization) ; b = a + 416 ; c =1249 ; d = 2028 ; e = 2916 ; f = 3748. Differences of N amounts added by fertdolomite were equalized by CAN (calcium ammonium nitrate: 27% N). The experiment was conducted in four replicates and the basic plot size was 77 m2. Two replicates of the experiment was limed in autumn of 2007 by granulated fertdolomite (the product of Petrokemija Fertilizer Factory Kutina: 24.0 % CaO + 16.0 % MgO + 3.0 % N + 2.5 % P2O5 + 3.0 % K2O) in amount 10 t ha-1. Two subplots from each replicates were harvested for receiving four replicates of grain yield data for each treatment. Aim of this study was testing of wheat response in 2012 to mentioned treatments and short review of the previous investigations of this experiment. Winter wheat in the 2012 growing season not responded to liming and PK- fertilization regarding yield, ears densities, thousand grain weight and hectoliter mass. However, total gluten contents in grain were decreased by liming (37.3% vs. 30.2%, respectively) and fertilization (36.5% and 31.0%, for a and f, respectively). As affected by liming, yields of maize were significantly increased for 5% (2008 and 2009) and for 8% (2011), soybean for 18% (2010). Residual effects of ameliorative PK-fertilization were found for maize (yield increases up to 6%, 8% and 11%, for 2008, 2009 and 2011, respectively) and soybean (yield increase up to 9%).

liming ; PK-fertilization ; grain yield of wheat ; grain quality

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