Journal of Food, Agriculture and Environment




Criteria for fertilization and acidity correction of sandy Argisol cultivated with soybean


Author(s):

Antonio Nolla *, Cássio Lizoti Berticelli, Mateus Konrad, Samoel Merizio Primo, João Henrique Castaldo

Recieved Date: 2015-07-02, Accepted Date: 2015-09-25

Abstract:

Soil acidity is a limiting factor for plant growth in agricultural systems. Thus, the use of alkaline substances is necessary to adjust the pH level of soil. Agricultural gypsum can act as a soil conditioner, reducing saturation with aluminium in the subsurface, optimizing the root system of plants. The present study aimed to assess the growth of soybean to which doses and combinations of agricultural gypsum and soil acidity correction agents were administered, in order to establish criteria for the correction of acidity and fertilization for soybean. An experiment was conducted on undisturbed soil columns filled by an Argisol originally under natural forests to which doses and combinations of limestone and silicate of calcium and magnesium were administered, with or without agricultural gypsum. Soybean was grown in PVC columns for 45 days. The development of soybean plants and soil chemical properties were assessed. Limestone and silicate of calcium and magnesium, used alone or combined, were equally effective in correcting soil acidity. The best soybean development was obtained with the treatments where agricultural gypsum was combined with both doses of limestone and silicate to raise the base saturation to 60%. The best performance for soybean was obtained when pH-H2O and base saturation reached values of 5.0 and 50%, and Ca+2, Mg+2 and Al+3 contents were 2.0, 0.7 and 0.5 cmolc kg-1, respectively.

Keywords:

Lime, slags, calcium silicate and magnesium, agricultural gypsum, Glycine max


Journal: Journal of Food, Agriculture and Environment
Year: 2015
Volume: 13
Issue: 3&4
Category: Agriculture
Pages: 15-20


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