Produção de mudas de cafeeiro (Coffea arábica L.) em tubetes com polímero hidroretentor, diferentes substratos e adubações

• Ano de defesa: 2003
• Autor(a) principal: Vallone, Haroldo Silva
• Orientador(a): Guimarães, Rubens José
• Banca de defesa: Souza, Carlos Alberto Spaggiari, Carvalho, Jacinto de Assunção
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: UNIVERSIDADE FEDERAL DE LAVRAS
• Programa de Pós-Graduação: DAG - Departamento de Agricultura
• País: BRASIL
• Palavras-chave em Português: Café; Muda; Substrato; Polímero hidroretentor; Adubação; Coffea; Seeling; Substrates
• Área do conhecimento CNPq: CNPQ_NÃO_INFORMADO
• Link de acesso: https://repositorio.ufla.br/handle/1/4241

Four experiments were carried out in the Coffee Section of the Federal University of Lavras, MG, aiming to verify: a) the effect of doses of a water retention polymer in the capacity of storing water and in the development of coffee seedlings in alternative substrates for tubes; b) evaluate the technical viability of substituting the commercial substrate for toasted rice coat, c) verify the development and the quality of coffee seedlings produced in tubes of 50 and 120 mL, depending on the different doses of slow liberation fertilizer. In the first and second experiment the following substrates were tested: Toasted rice coat (TRC); 70% TRC + 30% manure; 70% TRC + 30% vermiculite; 50% TRC + 50% commercial substrate; commercial substrate and regular substrate (70% earth + 30% manure), having added 5 doses of the water retention polymer (0; 4; 8; 12; 16 kg m-3 of substrate). In the third experiment the replacement of commercial substrate for toasted rice coat, in different proportions (0%; 25%; 50%; 75% and 100% of replacement), with and without the water retention polymer. In the fourth experiment the production of coffee seedlings in 50 mL and 120 mL tubes, with four doses of slow liberation fertilizer (0,4; 0,7; 1,0; 1,3 grams of fertilizer per tube). The cultivar used in the experiments was the Acaiá Cerrado MG-1474 and water retention for the substrates and the growth characteristics of the seedlings were evaluated. It was possible to conclude, based on the results, that adding the water retention polymer increases the capacity of storing water in substrates of high porosity, although it does not confer increases in the growth characteristics of coffee seedlings; the replacing of commercial substrate for toasted rice coat between 60 and 70%, confer greater increase in the seedlings in least time; the studied doses of slow liberation fertilizer do not change the growth of coffee seedlings in 50 and 120 mL tubes until the third pair of true leaves. The seedling produced in 120 mL tubes present higher development in comparison with the ones from 50 mL tubes, however not affecting the relation between canopy and roots, until the third pair of true leaves.