Effects of nitrogen sources on the production of cocoa trees
With a view to studying the effects of different sources of nitrogenous composts in the production do cocoa tree, a test was conducted on a dystrophic Red-Yellow Lato solo, in the Gandu municipality, Bahia, Brazil. The treatments used were: Sulphonitrate Nitromag(40% of N), calcium nitrate(15,5% of N), ammonium nitrate(33,5% of N), urea (45% of N), nitromag(26% of N) e ammonium sulphate(21% of N) in 60 kg of N/ha doses.The results of the production, expressed in kg of dry cocoa/ha, showed that there was a significant effect on the assessed parameter. The most significant reactions, relating to the 1996-1999 period, were found with the application of 60 kg of N/ha in the calcium nitrate form and in the presence of 90, 60 and 5kg/ha of P2 O5 K2 O and Zn, respectively, but not differing statistically from the sulphonitrate, ammonium nitrate, ammonium sulphate and the urea.
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| Format: | biblioteca |
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(Ene
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| Subjects: | THEOBROMA CACAO, COMPOST, SUBSTRATOS DE CULTIVO, SOLUCIONES NUTRITIVAS, ABONOS NITROGENADOS, NITRATO DE AMONIO, NITRATO DE CALCIO, UREA, SULFATO DE AMONIO, BRASIL, |
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