Uso de fertilizante de liberação lenta na produção de mudas de batata-doce em bandeja

Rooting of sweet potato seedlings submitted to supplemental calcium and phosphorus nutrition on substrate

“…After 45 days of seedlings' permanence in the trays, the increase in the substrate clod stability was small due to the lower emission of new roots. Rós et al (2013) also verified that after the 42 days of seedling' permanence in the trays, sweet potato seedlings emitted few new roots, which is in agreement with the results of this study and shows that the emission of Means followed by the same letters in the rows are not significantly different at p ≤ 0.05 according to LSD test; DM -Dry matter Table 1. Plant variables of sweet potato seedlings grown in trays in response to supplementation of Ca and P during the growth period of the seedlings…”

“…The substrate clod stability and the root number per seedlings increased up to 52 and 71 DAP, respectively ( Figures 3A and B). Rós et al (2013) also obtained increases in the root number of the sweet potato seedlings produced in trays up to 70 DAP, i.e., until a similar period to that observed in this study.…”

“…The fact that the supplemental Ca fertilization does not increase the substrate clod stability indicates that fertilization of the substrate cannot always decrease the permanence time of sweet potato seedlings in a greenhouse, as reported by Rós et al (2013). In addition, these authors verified that the supplemental fertilization of the substrate with NPK fertilizer 19-06-10 did not increase the root number emitted by sweet potato seedlings; their results are similar to those obtained in the present study in which there was Ca supplementation to the substrate.…”

“…However, as the nutritional status of seedlings plays an important role in the phases of induction and root formation (Cunha et al, 2009), crop nutritional management in this phase is very important. In this production system, it is necessary to provide supplemental fertilization of the substrate (Rós et al, 2011; because depending on the period of the seedlings' permanence in the greenhouse, the substrate cannot supply the nutritional needs of the seedlings (Rós et al, 2011; and the supplemental fertilization can reduce the permanence time of seedlings in the greenhouse (Rós et al, 2013). In other situations in which the seedlings need to stay for a longer period in the trays, the supplemental fertilization of the seedlings is also essential for the maintenance of their quality.…”

Uso de diferentes tipos de fertilizantes minerais na produção de Ipomoea batatas BRS Amélia em cultivo vertical

“…Em trabalho de (GUIRRE et al 2020), ao trabalhar com fertilização com adubos orgânicos constatou resposta positiva na obtenção de maior produtividade total em toneladas por hectare com a utilização da cultivar BRS Amélia. Acrescido aos resultados alcançados por RÓS et al (2013), onde observaram efeito positivo em mudas de batata-doce produzidas em bandejas, havendo um incremento de raízes com o aumento das doses de fertilização mineral. Tais episódios comprovam a importância de um programa de fertilização aplicado para a cultivar BRS Amélia a nível de campo pelos agricultores, visando maior produtividade.…”