TEORES DE MACRONUTRIENTES EM PLANTAS DE PIMENTÃO ENXERTADAS SOB FERTIRRIGAÇÃO
2014
1 RESUMO Este estudo teve o objetivo de determinar os teores de macronutrientes (N, P, K, Ca, Mg e S) em plantas enxertadas pelos metodos contato bisel, garfagem por fenda cheia e encostia, comparadas as plantas nao enxertadas (pe-franco), nos diferentes orgaos da planta, sob fertirrigacao em ambiente protegido. O hibrido e o porta-enxerto utilizados foram o AF 7125 e AF 8253 respectivamente. Os nutrientes foram fornecidos via fertirrigacao durante o ciclo de 150 dias. O experimento foi desenvolvido na Fazenda de Ensino, Pesquisa e Producao Sao Manuel, no municipio de Sao Manuel – SP pertencente FCA-UNESP, Campus de Botucatu – SP, e constou de quatro tratamentos e cinco repeticoes. Cada parcela foi composta por 12 plantas. Realizaram-se as analises quimicas em uma planta por parcela aos 35, 85, 112 e 143 dias apos transplante, para determinar a concentracao dos nutrientes. Os resultados mostram que a concentracao de macronutrientes na ordem decrescente na parte vegetativa (folha + caule) foi: K > N > Ca > Mg > S > P; ja nos frutos foi: K > N > P > S > Mg > Ca. A concentracao dos macronutrientes foi equivalente entre as plantas enxertadas quando comparando com pe-franco e que o porta-enxerto pode influenciar na absorcao e translocacao de minerais nas plantas enxertadas. Palavras-Chave: Concentracao de nutrientes, ambiente protegido gotejamento, Capsicum annuum L. SILVA, E. G; TAKATA, W. H. S.; OLIVEIRA JUNIOR, M. X.; SILVA, J. D; GOTO, R. MACRONUTRIENT LEVELS IN GRAFTED PEPPER PLANTS UNDER FERTIGATION 2 ABSTRACT This study aimed at determining the levels of macronutrients (N, P, K, Ca, Mg and S) in grafted plants by contact methods such as bevel, cleft grafting by full rift and approach, as compared to non grafted plants. Analyses were performed in different parts of the plants under fertigation in a greenhouse. The hybrid and rootstock were AF 7125 and AF 8253, respectively. The nutrients were supplied via fertigation during the 150-day cycle. The experiment was carried out at the Teaching, Research and Production Farm in Sao Manuel city, SP which belongs to FCA-UNESP Campus in Botucatu city/SP. A total of 4 treatments and 5 replications were used. Each plot consisted of 12 plants. Chemical analyses were performed in one plant per plot at 35, 85, 112 and 143 days after transplantation to determine nutrient concentrations. The results showed that the macronutrient concentrations in a decreasing sequence in the vegetative parts (leaf + stem) were as follows: K > N > Ca > Mg > S > P; and in the fruits: K > N > P > S > Mg > Ca. Macronutrient concentrations were similar among grafted plants as compared to ungrafted plants, and the rootstock may have influenced absorption and translocation of minerals in grafted plants. Keywords: nutrient concentration, drip, protected environment, Capsicum annuum L.
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