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Print version ISSN 0006-8705On-line version ISSN 1678-4499

Bragantia vol.25 no.1 Campinas  1966 



Influência das formas de fertilizantes nitrogenados e suas épocas de aplicação na cultura do feijoeiro*


Influence of various sources of nitrogen and dates of their application in the dry bean culture



H. A. A. Mascarenhas; Shiro Miyasaka; Toshio Igue; Ary de Arruda Veiga; Sebastião Alves




A preliminary trial with dry beans (Phaseolus vulgarisL.) was conducted on two types of soils, Ortho Red Yeollow Podzolic and Ortho Dark Red Latosol to compare 3 sources of nitrogen, namely: Chilean nitrate, Ammonium sulfate and Nitrocalcio (ammonium nitrate + calcium carbonate). The nitrogen was applied in the total quantity at the rate of 50 kg/ha of N at 7, 14 and 21 days after emergence of the plants. Nitrogen, independent of the dates of application and forms used, increased the yields by 94% at Monte Alegre do Sul and 29% at Tietê when compared with control (only PK). Statistical analyses showed that there was no significant difference in the production when different sources of nitrogen were used and also when applied at different dates.



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Recebido para publicação a 14 de abril de 1966.



* Trabalho apresentado à XVIII Reunião da Sociedade Brasileira para o Progresso da Ciência, realizada de 10 a 16 de julho de 1966, em Blumenau.

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