engleski

Residual impacts of liming and fertilization on soybean yield and quality

The field experiment was conducted in the spring of 2004 by application treatments as follows: a = conventional fertilization, b = a + NPK-1, c = a + NPK-2, d = a + NPK-3 and e = a + NPK-4. The fertilizer NPK 10:30:20 was source of P and K (using in amounts 416, 1249, 2082, 2916 and 3748 kg/ha, for the treatments a, b, c, d and e, respectively). Nitrogen amount was equalized for all treatments by addition of adequate quantities of CAN (calcium ammonium nitrate with 27% N). The experiment was conducted in four replicates. In the next years the experiment has been fertilized uniformly in the level of conventional fertilization. Additional intervention was liming of the third and fourth replication by 10 t ha-1 with granulated fertdolomite (24.0 % CaO + 16.0 % MgO + 3.0 % N + 2.5 % P2O5 + 3.0 % K2O) in autumn of 2007. Soybean (cultivar Lucija) was grown on the experimental field in the 2010 growing season. Soybean was sown at the end of April on the density of 650 000 seeds ha-1. Harvested area was 2.0 m2 from each basic plot. Yield was calculated on 13 % grain moisture and 600, 000 plants ha-1 basis. As affected by liming yields of soybean were increased for 18 % (means 3279 and 3854 kg ha-1, for unlimed and limed plots, respectively.) Also, grain quality parameters were improved by liming (thousand grain weight were 151.8 and 168.3 g ; protein contents were 35.24 and 39.06 %, respectively), while oil contents were decreased (23.84 and 22.62 %, respectively). An impact of P and K fertilization was considerably lower in comparison with liming.

liming ; P and K fertilization ; soybean ; yield ; protein contents ; oil contents

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