Deficiência de boro em batatinha cultivada em solo orgânico do vale do Paraíba

Boron deficiency in potato cultivated in an organic soil, at Paraiba valley

NOTA

Deficiência de boro em batatinha cultivada em solo orgânico do vale do Paraíba^*

Boron deficiency in potato cultivated in an organic soil, at Paraiba valley

Rúter Hiroce; José Romano Gallo; Sylvio de Azevedo Nóbrega

SUMMARY

In 1963, an abnormality, characterized by leaf rolling, petiole flattening, stunting, and lack of development of the apical shoot, were observed in potato plants grown in an organic soil at Paraiba Valley, S Paulo State. Preliminar experiences indicated that application of a mixture of micronutrients to the soil, avoided these symptoms and caused a nearly three fold increase in the tuber production.

Two series of experiments were then carried out in 1965, in which different micronutrients, individually or all together, were added to the standard NPK fertilizer, to be used in a potato culture grown in the same site where the abnormalities were observed.

Among the several treatments, only those containing boron induced an increase in tuber production and kept plants free from the symptoms. In these experiments a significant correlation was noted between the boron content of the leaves and the tuber production (r₁ = 0.53; r₂ = 0.39).

These data strongly suggest that the observed abnormality in potato plants are due to boron defficiency.

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Recebido para publicação em 7 de abril de 1970.

*

Trabalho parcialmente apresentado na XIX Reunião Anual da Sociedade Brasileira para o Progresso da Ciência, realizada no Rio de Janeiro, de 9 a 15 de julho de 1967.

Datas de Publicação

• Publicação nesta coleção
  18 Mar 2009
• Data do Fascículo
  1971