[Yield and quality of spring rape seeds depending on supplying of sod-podzolic light loamy soil with magnesium and fertilizers]
2006
Mishuk, O.L.,National Academy of Sciences. Scientific and Practical Center for Arable Farming (Belarus). Institute for Soil Science and Agrochemistry
As a result of the lead researches it is established, that application of magnesium and sulphurous fertilizers at different levels of the content of exchange magnesium in sod-podsolic light loam soil has rendered essential influence on increase of productivity of seeds spring rape. Entering of full mineral fertilizer into dozes N80430P60K90+B has ensured productivity of seeds spring rape on the average for 3 years of researches of 17,1-21,8 c/ha. Increases of a crop thus increased with 5,9 up to 8,3 c/ha in process of increase of the content of exchange magnesium in soil from 128 up to 250 mg/kg in comparison with a background variant. The greatest increase of a crop of 8,3 c/ha from NPK+B fertilizers has been received at the content in soil of exchange magnesium of 250 mg/kg. Application of sulphurous fertilizers has appeared more effective at first two levels of the content of exchange magnesium in soil where they have provided productivity of seeds of 19,1-21,0 c/ha. Thus use of sulfur in the form of phosphogypsum has raised productivity of seeds on 2,8 c/ha, and in the form of sulfate of ammonium - on 2,0-2,1 c/ha. However it is more economically to use sulfate of ammonium that is connected with increase of expenses at use of phosphogypsum. Thus, application of sulphurous fertilizers and not root top dressing by sulfate of magnesium on background N80+30P60K90+B of 128-250 mg/kg raised productivity of seeds of spring rape on 10,5-11,1 c/ha because of with the content of exchange magnesium (128-250 mg/kg)
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