Changes in plant nutrient content of barley as a result of lime, phosphorus, manganese, copper and zinc supplies on three Swedish mineral soils in a pot experiment
1995
Hylander, L. (Sveriges Lantbruksuniv., Uppsala (Sweden). Inst. foer Markvetenskap)
A pot experiment was preformed with barley (Hordeum vulgare c.v. Etu) grown on three Swedish mineral soils of different texture. A central composite experimental plan with five levels of lime, P, Mn, Cu and Zn amendments was applied. Plant, straw, grain and soil samples were analysed for contents of Ca, P, Mn, Cu, Zn and Al. There were close relations between the contents of P, Cu, and Zn in vegetative parts and the treatment with the corresponding element. Supply of Mn resulted in increased plant uptake of Mn only in the sandy soil, while liming decreased Mn uptake on all the soils. The relative strong extractants of AL, EDTA and HCl indicated close relations between soil extracted nutrients and the supplies of corresponding elements. The Mg(NO3)2-extracted amounts of Mn were not related to Mn supply on the clayey soils, but gave much closer relation to plant uptake of Mn than EDTA-extracted Mn did. Soil analyses results from the sandy soil showed generally, closer relationships to treatment and plant content than corresponding values from the two clayey soils. The reasons could be lower original nutrient status and lower CEC, resulting in poor buffer capacity of the sand. The quantity of soluble Al was very low in all three soils, except for not limed clayey soils. The yield decrease after liming of the sandy soil and the yield increase after liming the clayey Oestuna soil could be caused by disturbed and improved nutrient balance, respectively, between certain nutrients in the soil solution.
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