engleski

Residual effect of liming on maize grain yield

Maize is one of the most important cereal worldwide with high genetic potential. However, unfavorable soil properties or weather conditions lead to great yield variability and decrease grain yield. Very oft en, limiting factors of field crops yield is soil acidity and unbalanced nutrients supply associated with it, which can be solved by liming. Aim of this study was to determine the residual effect of liming with granulated lime material (trade name Fertdolomit) containing 24 % CaO, 16 % MgO, 3 % N, 2.5 % P2O5 and 3% K2O on maize yield. Field experiment was set up in 2008 in a RCBD with four repetitions on a very acid soil (pHKCl 4.69) in the east Croatia. In total six treatments were used: control (without liming), 5 t ha-1, 10 t ha-1, 20 t ha-1, 30 t ha-1 and 40 t ha-1 of lime. Maize hybrid belonging to FAO 400 group was growing. Th e growing season of 2015 was less favorable for maize growing regarding weather conditions. Main characteristics were extremely hot summer and inadequate distribution of rainfall. Seven years aft er application, liming significantly increase grain yield of maize. Application of 20 t ha-1 increased grain yield in 2015 by 15 % (9.40 t ha-1) and 30 t ha-1 of lime by 21 % (9.88 t ha-1) in comparison to control treatment (8.14 t ha-1). At the same time, liming didn’t affect grain moisture, although in previous years of research statistically significant differences were found among treatments. Based on our previously research, liming and high dose of lime material have long term positively effect on grain yield of many field crops.

maize ; liming ; residual effect

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