engleski

Impacts of liming with dolomite on the wheat yield

The stationary field experiment with increasing rates of dolomite meal (56% CaO + 40% MgO) was started in spring of 2003 in Badljevina (Pakrac municipality, Pozega-Slavonia County) on very acid soil (pH in 1n KCl 3.74). Total four treatments of dolomite were applied on ordinary fertilization (160 N + 100 P2O5 + 130 K2O) as follows: a = control (without dolomite) ; b = a + 5 t ha-1 ; c = a + 10 t h-1 and d = a + 15 t ha-1. The field trial was conducted in four replicates (basic plot size 92.4 m2). In the next years (2004-2009) the experiment was fertilized uniformly in level of the ordinary fertilization. Crop sequence for the 2003 - 2009 period was as follows: maize (2003 – 2005) – spring barley (2006) – maize (2007). Residual effects of liming on winter wheat yields in 2009/2010 growing season were found because unlimed plots yielded 2.92 t ha-1 while liming effects were up to 18% (range from 3.24 to 3.44 t ha-1). Number of spikes per area unit is main reason for yield increasing on limed treatments. Liming was mainly considerable effects on yields of the previous crops in the 2003 - 2007 period. The grain yield of maize was influenced by liming in four years and yield was significantly increased at all liming treatments compared with control. Maize responded to liming by increasing grain yield for 15% (2003), 25% (2004), 150% (2005) and 50% (2007), while spring barley yield were increased by liming for 20% (2006).

Liming ; wheat ; dolomite

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