The effect of the depth of placing a multicomponent fertilizer in soil on the yield of crops
2004
Pabin, J. | Biskupski, A. | Wlodek, S.,Instytut Uprawy Nawozenia i Gleboznawstwa, Pulawy (Poland). Zaklad Technik Uprawy i Nawozenia, Jelcz-Laskowice
The tests were based on 2 microplot experiments. Experiment 1 was set on light soil. Experiment 2 on medium one. Each experiment consisted of 30 square m plots separated from each other by concrete insulating walls to 120 cm depth. In both experiments following fertilizing variants were applied: I - 0.5 dose superficially, mixed up with a rake, II - 1.0 dose superficially, like in I, III - 0.5 dose superficially, like in I, and 0.5 dose at 10 cm depth, IV - 0.5 dose superficially, like in I, and 0.5 dose at 20 cm depth, V - 0.5 dose superficially, like in I, and 0.5 dose at 30 cm depth. In experiment 1 (1996), oats (1997) and winter rye (1998) were grown maize, and in experiment 2 - maize (1996), oats (1997) and winter wheat (1998). Single fertilization was applied before sowing in the form of Polifoska 6 NPK (6:20:30) at the same doses in both experiments: for maize - 30.0 kg N, 43.7 kg P and 124.0 kg K a hectare, for oats, winter rye and winter wheat - 20.0 kg N, 35.0 kg P and 99.6 kg K a hectare. Application of multicomponent fertilizer at 0.5 dose superficially and 0.5 dose at 10, 20 or 30 cm depth appeared to have exerted a significant influence the on increase in yields of the test plants (as compared to a whole dose superficially) on both light and medium soil. A positive correlation between the depth of placing the multicomponent fertilizer and the yield of crops was conditioned by the course of weather, mainly precipitation. Its specification accrued together with intensified precipitation deficits in the period of highest water requirement of the plants
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