Influência da adubação em doses variadas na produtividade e no estado nutricional da cultura do café (Coffea arabica L.) / Influence of variable rate fertilizer application on yield and nutritional status of coffee crop (Coffea arabica L.)

AUTOR(ES)
DATA DE PUBLICAÇÃO

2010

RESUMO

The precision agriculture techniques, besides adding tools to identify the causes of variability found in the fields, provide solutions for this variability to be corrected or for the best management solution when the variability is unavoidable. Brazil is the biggest producer of coffee within an increasing market. Therefore, because of the potential yield and profit of coffee crop, currently the interest in site specific management techniques and the demand for new technologies are increasing. This study aimed to evaluate the influence of site specific management of fertilizers (nitrogen, phosphorus and potassium) in the yield and in the nutritional status of coffee crop. Four commercial areas were used, one located in Gália, SP, and three in Patrocínio, MG. Two treatments were established to test the hypothesis of higher yield and maintenance of the nutritional status of coffee with site specific fertilizer rates of nitrogen, phosphorus and potassium. The results indicated that nitrogen, phosphorus and potassium nutrients applied in variable rates increased the yield in 240.0 kg ha-1, considering all the harvesting seasons. Nitrogen fertilizer consumption was reduced in 134.7 kg ha-1 and potassium in 82.0 kg ha-1, on the other hand phosphorus consumption increased in 65.0 kg ha-1. The evaluation of nutritional status of coffee plants was appropriate for possible corrections of nutrient supplying during fertilization.

ASSUNTO(S)

fertilizantes npk fertilization management precision agriculture coffee yield café - produtividade adubação - manejo npk fertilizer nutrição vegetal. plant nutrition. agricultura de precisão

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