Fertilización nitrogenada de la papa (Solanum tuberosum L.) en la provincia de Holguín. Dosis óptima de nitrógeno
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Abstract
usually planted on a noncarbonated Loose Brown soil in
Holguin where fertilization does not consider the
edaphoclimatic characteristics of the locality. To manage this
essential requirement, two experiments were carried out over
1996-1997 and 1997-1998 with N doses between 50 and
200 kg.ha-1. Plant height kept a positive linear relationship
with applied N doses and plant growth was similar in both
seasons studied, achieving the highest bulking, tuber weight,
dry weight and yields with doses of 100 and 150 kg.ha-1 N,
whereas potato N extraction was higher as the applied N dose
increased. The optimal dose was 110 kg.ha-1, so that 45 % was
reduced when compared to production dose. The highest
starch content was obtained with 50 kg.ha-1 N and the greatest
available N recovery coefficient in the medium was recorded
with 100 kg.ha-1 N, which is very close to the optimal dose.
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