Nutrient status on an acid soil as affected by lime amendments after flooding

Abstract:

Rice growth in wetlands or paddy soils is economically important in Latin America, where lime amendment is becoming a conventional practice. A field study was conducted to compare changes induced by liming a rice soil in Corrientes (Argentina). Three different treatments were considered: control, with no lime addition, and two applications of dolomite at rates of 625 kg/ha and 1250 kg/ha. Physico-chemical parameters (Eh, pH) and nutrients (NH4 +‐N, K, Olsen-P and extractable Mn, Fe and Zn) were measured just before flooding and during a ten week period after flooding. At the beginning of the experiment pH ranged between 4.0 and 4.4 and in all the treatments a sharp pH rise was observed from week two to week four after flooding. The initial differences in pH between the control plot and plots amended with dolomite disappeared at the end of the ten week period, when pH conditions were near …

Año de publicación:

2002

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