Response of Manitoba soils to banding phosphorus with sulfate or carbonate salts

Abstract

Applications of sulfate and carbonate salts have been shown to improve the solubility of phosphorus (P) in model calcareous soils. It is unclear how these treatments will influence P solubility in real soils. The objective of this study was to determine the effect of sulfate or carbonate salts on P solubility in selected Manitoba soils. We hypothesized that the application of carbonate or sulfate salts in a fertilizer band could enhance the solubility of P in Manitoba soils. Different salt mixtures were prepared by mixing either monopotassium phosphate (MPP) or monoammonium phosphate (MAP) with K2SO4, (NH4)2SO4, MgSO4, or (NH4)2CO3. After the 2 wk of incubation of salt-treated soils, both P sources decreased soil pH significantly. The addition of salts did not significantly affect pH in most of the soils. There was a significant treatment effect (P < 0.0001), a significant soil effect (P < 0.0001), and a significant soil by treatment interaction (P < 0.0001) on water-extractable P. Coapplication of either sulfates or (NH4)2CO3 salt increased soluble P in some soils by 6%–44% or 11%–14%, respectively. Application of carbonate or sulfate salts increased P solubility only in soils with a smaller ratio of HCl-extractable Ca to ammonium acetate-extractable Ca.

Effects of salts on phosphorus adsorption in alkalize Tunisian soil

“…It can be shown that all three types of salt additions could increase the P adsorption in the soil solution to compare with the control sample. However, P adsorption can be varied according to the type of salts (Mihiri et al 2016). After addition of 0.01M of all salts, it has been occur an increase of measured P adsorption which reached 2.6%, 4.31%, and 8.39% in the case of P-KCl, P-NaCl and P-CaCl 2 , respectively.…”

Influence of Foliar Fertilization with Monopotassium Phosphate on Growth and Yield of Sweet Potato (Ipomoea batatas L.)

“…이상으로 높은 토양에서는 토양산도에 미치는 효과가 미미하거나(Manimel Wadu et al, 2016) 오히려 pH가 감소하는 경우도 보고되었다(Lee and Hong, 2016). 모든 처리구의 토양 EC는 0.19 -0.21 dS m -1 , 유기물 함량은 16 -17 g kg -1 , 유효인산 함량은 262 -291 mg kg -1 , 치환성 칼륨 함량은 0.22 -0.26 cmol c kg -1 , 치환성 칼슘 함량은 8.0 -8.6 cmol c kg -1 , 치환성 마그네슘 함량은 2.6 -2.7 cmol c kg -1 로서 유의적인 차이가 없었다.고구마 생육 및 수량 수확기 고구마 생육과 수량은Table 2와 같다.…”