Journal of Food, Agriculture and Environment

Lime-phosphate relation and soybean growth in an oxisol from no-tillage system

Author(s):

Antonio Nolla ¹*, Ibanor Anghinoni ², Tiago Roque Benetoli da Silva ^1*, Maria Anita Gonçalves da Silva ³

Recieved Date: 2012-10-18, Accepted Date: 2013-01-14

Abstract:

Phosphorus (P) accumulation can be observed in the surface no-tilled soil layer, that can cause aluminium (Al⁺³) inactivation. Lime-phosphate interaction may, in this situation, explain the lower crop response to liming. The objective of this research was to evaluate the effect of different soil acidity and P combinations on soybean growth in undeformed soil in columns, collected in the no-tillage system. An experiment was conducted in a clayey Rhodic Hapludox (Oxisol) which has been seven years under no-tillage after the application of 1 (1/24 lime recommendation), 6 (1/4 lime recommendation) and 24 (lime recommendation  pH 6.0) t ha^-1 of lime. Phosphorus was applied in the surface columns, in equivalent rates of 0, 40 and 80 kg ha^-1 of P₂O₅ as triple phosphate. After 25 days of soybean cultivation, relationships between soil acidity and P attributes and plant parameters were established. The relation of substitution between lime and phosphate was characterized by aluminium content and saturation decrease with soil phosphorus increase, that determined a higher soybean response to this nutrient under low acidity conditions. 

Keywords:

Soil acidity indexes, soil phosphorus content, plant parameters

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Journal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 1
Category: Agriculture
Pages: 294-298

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