Desenvolvimento inicial de mudas de mogno africano em função de susbtratos e lâminas de irrigação

Abstract

In recent years, in the Brazilian Savannah, there is a growing interest in the cultivation of tree species, which stand out for their environmental and commercial importance. The objective of this work was to evaluate the initial growth of African mahogany (Khaya ivorensis) plants on substrates and irrigation levels and to select the productive characteristics that result in ideal conditions for production .The experiment was installed in a randomized block design, with four replications, in split-plot, in the scheme 5 x 3, plots composed of five daily irrigations levels (6, 8, 10, 12, 14 mm) and four subplots substrates: S1-100% OXISOL RED; S2-50% OXISOL RED and 50% sand and S3-45% OXISOL RED, 45% sand, and 10% of tanned. The evaluated characteristics were plant height, stem diameter, number of leaflets, root system length, dry matter mass of roots, dry matter mass aerial part, dry matter mass seedling, ratio between roots dry matter mass and aerial part and seedling quality. The depth irrigation of 6 mm dia-1 was the most indicated and the S1 substrate provided the highest quality to the African mahogany, under the conditions in which the study occurred.

Emergence and Early Seedling Growth of Dilodendron Bipinnatum Radlk in Different Substrates

“…As a result, whether the substrate is not very aerated due to overwatering, this stagnant water causes a typical stress situation by restricting free diffusion of oxygen from air to germinating seeds or even inhibiting germination (NARSAI et al, 2015, MARCOS FILHO, 2005. On the contrary of our findings, OLIVEIRA et al (2020) found positive effect of a mixture of 45% red soil + 45% sand + 10% chicken manure substrate on seedling growth of Khaya ivorensis (Meliaceae).…”

Análise de trilha da influência do cádmio no mogno

“…This behavior has already been reported in several studies where other metals such as Cr, Cu, and Zn have been shown to directly affect the activity of the nitrate reductase enzyme, especially when found in high concentrations, thus affecting the main input of nitric nitrogen in plant metabolism. Another important interference of this metal seems to be related to the imbalance of homeostatic function and plant development Moraes;Conceição;Oliveira;Okumura;Silva;Oliveira Neto, 2021).…”

Crescimento e qualidade de mudas de baru em reposta a hidroretentor e água magnetizada

“…É comum na literatura trabalhos que reportam frequências de irrigação e frações de reposição diversas, com variação de uma irrigação diária até doze vezes ao dia em espécies distintas [10,16,17,18,19] entretanto, torna-se inviável uma frequência reduzida associada ao uso de hidrogel, pois, segundo [20] o custo de produção e plantio com uso do hidrogel é menor em estações secas. Ou seja, na produção de mudas em substratos comerciais, parece inconsistente o uso de doses de polímero hidroabsorvente com irrigações frequentes ou diárias visando manter a umidade elevada.…”