Chemical composition and removal of nutrition elements with harvest of spring rape at liming of sod-podzolic light loamy slightly acid soil with various forms of ameliorants | Химический состав и вынос элементов питания урожаем ярового рапса при известковании дерново-подзолистой легкосуглинистой слабокислой почвы различными формами мелиорантов
2010
Safronovskaya, G.M. | Tsaruk, I.A., National Academy of Sciences. Scientific and Practical Center for Arable Farming (Belarus). Institute for Soil Science and Agrochemistry
Determination of action of sod-podzolic light loamy slightly acid soil liming with various forms of ameliorants was realized in the conditions of the Republic of Belarus. As a result of the research it was revealed that in course of liming of sod-podzolic slightly acid soils with various forms of lime ameliorants rendered a positive influence on crop yield of spring rape seeds, chemical composition of plants and removal of the main nutrients by crop yields. Application of calcareous sapropel practically did not affect the growth of the specific removal of calcium and magnesium by crop yield. The introduction of dolomite, which has a longer aftereffect and contained calcium and magnesium, increased the specific removal of calcium from 9.0 to 9.9-10.8 kg/t, magnesium - from 4.1 up to 4.5-5.2 kg/t. The highest specific removal of calcium was obtained by chalk application - 11.7 kg/ha. Lime application of slightly acidic soil increased the growth of the specific removal of phosphorus on 0.5-1.6 kg/t, but the forms of ameliorants had no significant effect on the removal of phosphorus, which values in variants were 24.2-25.3 kg/t. On the background of dolomite powder increase of doses of dolomite potassium from 90 to 150 kg/ha increased the potassium content of the rapeseed dry weight on 0.09%, in the straw - on 0.41%. In this case, the specific removal of elements increased from 23.5 to 29.0 kg/t, accordingly. This was also provided with seed crop yield increase due to potash fertilizer action. Increase of doses of nitrogen from 120 to 150 kg/ha increased the percentage removal of the element from 37.6 to 38.6 kg/t (1 kg/t).
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