Adubação do algodoeiro: XV- ensaios com vários adubos nitrogenados Fertilizer experiments with cotton: XV - trials with various nitrogenous fertilizers
| Autor: | Milton G. Fuzatto, Popílio A. Cavaleri, Nelson Machado da Silva |
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| Jazyk: | angličtina |
| Rok vydání: | 1965 |
| Předmět: | |
| Zdroj: | Bragantia, Vol 24, Iss unico, Pp 339-358 (1965) |
| ISSN: | 1678-4499 0006-8705 |
| Popis: | Neste artigo são relatados os resultados de 12 ensaios, instalados em vários tipos de solo do Estado de São Paulo, para comparar o efeito de diferentes adubos azotados na cultura algodoeira. Salitre do Chile, nitrato de cal IG e Calnitro IG, aplicados no sulco de plantio juntamente com fósforo e potássio, não diferiram substancialmente. Apenas Urecal IG se mostrou menos eficiente. Aplicados em cobertura aos 30 dias após a germinação, o salitre do Chile, sulfato dc amônio e Nitrocálcio tiveram comportamento semelhante, mas a uréia se mostrou levemente inferior.In this paper are reported the results obtained in twelve experiments comparing various nitrogen sources as mineral fertilizers for cotton. Experiments were conducted for some years, located at different soil types used for cotton in the State of São Paulo. When applying Chilean nitrate, Calnitro IG. nitrato de cal IG and Urecal IG in the furrows together with phosphorus and potassium, the effects obtained were practically the same, except for Urecal IG which showed minor response. With exception of Chilean nitrate, these fertilisers are no more used by farmers presently. In another series of trials Chilean nitrate, ammonium sulphate, Nitrocalcio (ammonium nitrate + calcium carbonate) and urea were applied as dressing after 30 days of planting time. These treatments had about the same results; however treatment with urea had a lower effect. |
| Databáze: | OpenAIRE |
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