Cloreto de potássio para a soja

Mascarenhas, Hipólito A. A.; Hiroce, Rúter; Braga, Nelson R.

doi:10.1590/S0006-87051976000200027

NOTA

Cloreto de potássio para a soja¹ 1 Pesquisa parcialmente subvencionada pelo Projeto FAPESP 73/1170.

Potassium chloride for soybeans

Hipólito A. A. Mascarenhas² 2 Com bolsa de suplementação do C.N.Pq. ; Rúter Hiroce² 2 Com bolsa de suplementação do C.N.Pq. ; Nelson R. Braga

SUMMARY

Potassium has been noted to be a very important element for soybeans. There are no responses to application of potassium when the soil analysis shows 0.12 e.mg of K+/l00g of soil. Although it has been observed that potassium controls the fungus desease Diaporthe phascolorum (Cke. et Ell.) Sacc. var. sojae (Lehman) Wehm. Excessive application of this element in the form of potassium chloride can cause the burning of the leaves due to salinity during short periods of drought. In the field it has been observed that when soil analyses show 0.20 e.mg of K+/100 g of soil it is sufficient to control the fungus desease and avert the burning of the leaves due to salinity.

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Recebida para publicação em 16 de julho de 1976.

1

Pesquisa parcialmente subvencionada pelo Projeto FAPESP 73/1170.

2

Com bolsa de suplementação do C.N.Pq.