Antagonistic interaction between zinc and cadmium in cocoa (Theobroma cacao L. var. CCN-51) seedlings amended with rock phosphate
Henry Díaz-Chuquizuta·Boris Martínez·Martín Sánchez Ojanasta·Richard Solórzano·María Esmilda Malca Quezada·Geomar Vallejos-Torres·Hugo Alfredo Huamaní Yupanqui·Juan-Pablo Cuevas
Introduction In the San Martın region, several studies have reported Cd concentrations in surface soils approaching the upper limit (UL), with mean values ranging from 0.27 to 1.351 mg·kg - ¹. Methods Cadmium (Cd) transfer to Theobroma cacao (CCN-51) seedlings was evaluated under 12 factorial combinations of phosphate rock (RFP) and foliar zinc sulphate (ZnSO 4 ) applications, using relative uptake (foliar Cd/soil Cd) as the primary response variable. Results The treatment showing the highest Cd