Qualidade de mudas de berinjela submetida a diferentes métodos de produção

Abstract

Qualidade de mudas de berinjela submetida a diferentes métodos de produção 1The quality of eggplant seedlings under different production methods Resumo -Produzir mudas de berinjela com boa qualidade é essencial para obter um sistema de cultivo uniforme e produtivo. Estas podem ser formadas em substratos orgânicos e minerais, ou misturas destes. Desta forma o presente trabalho avaliou a vermiculita e manivas de mandioca triturada, puras e em misturas, na formação de mudas de berinjela, em dois tipos de ambientes e dois recipientes. Utilizou-se o viveiro agrícola telado em monofilamento, malha com 50% de sombreamento e a estufa agrícola em arco, coberta com filme polietileno, com fechamentos de tela de monofilamento, malha para 50% de sombreamento. Em cada ambiente foram testadas as bandejas de poliestireno de 72 e 128, preenchidas com "0% vermiculita e 100% ramas", "20% vermiculita e 80% ramas", "40% vermiculita e 60% ramas", "60% vermiculita e 40% ramas", "80% vermiculita e 20% ramas" e "100% de vermiculita e 0% ramas". O delineamento experimental foi o inteiramente casualizado no esquema fatorial de parcelas sub-subdivididas (2 ambientes x 2 recipientes x 6 substratos), totalizando 24 tratamentos. A tela de monofilamento é o melhor ambiente de cultivo quando se utiliza a bandeja de 72 células, e para a bandeja de 128 células a estufa agrícola propicia melhores condições. O melhor recipiente para formação de mudas de berinjela é a bandeja de 72 células. As composições medianas de vermiculita e ramas de mandioca, entre 40 e 60%, formam o melhor substrato para as mudas de berinjela. O índice de qualidade de Dickson é um bom indicador do padrão de qualidade de mudas de berinjela.Palavras-chave -Berinjela. Vermiculita. Mandioca.Abstract -Producing good-quality eggplant seedlings is essential for a uniform system of cultivation and yield. The seedlings can be grown in organic or mineral substrates, or a mixture of these. This study evaluated the effect of vermiculite and crushed cassava stems, both pure and as a mixture, on eggplant-seedling growth in two types of environment and in two different types of container. A nursery greenhouse and poly-tunnel greenhouses, both with monofilament screening and 50% shading, were used. In each environment polystyrene trays of 72 and 128 cells were tested. These were filled with: 0% vermiculite and 100% cassava stems; 20% vermiculite and 80% cassava stems; 40% vermiculite and 60% cassava stems; 60% vermiculite and 40% cassava stems; 80% vermiculite and 20% cassava stems, and 100% vermiculite and 0% cassava stems. The experimental design was completely randomized into a scheme of subdivided sub-plots (2 environments x 2 containers x 6 substrates) totaling 24 treatments. The monofilament screen is the best environment when using a tray of 72 cells. For trays of 128 cells, the greenhouse provides the best conditions. The best container for eggplant seedlings is the tray of 72 cells. The median mixtures of vermiculite and cassava stems, between 40 and 60%, are the best substrate for...

Effects of plant growth regulators on eggplant seed germination and seedling growth

“…In general, forest species present a strong correlation between survival rate of seedlings in the field and its stem diameter at substrate surface level, because they would be more susceptible to stresses if planted with reduced stem diameter at substrate surface level in the field, and practices after planting would be insufficient to increase their survival rate (Carneiro, 1995). Such information can also be valid for vegetable species, as observed in the present study, since seedlings from GA 3 -treated seeds showed higher stem diameter at substrate surface level, even than those observed in other studies on eggplant (Costa et al, 2011).…”

“…Costa et al (2011) stated that this index is a good indicator for quality of seedlings because it considers several morphological traits such as height, stem diameter at substrate surface level and biomass, which is also recommended for eggplant seedlings.…”

Kale Seedlings Production in Different Substrates, Cell Volumes and Protected Environments

“…Authors also evaluated the quality of seedlings observed that trays with 72 cells formed the best seedlings (OLIVEIRA et al, 2012;COSTA et al, 2011). This result reinforces that higher volumes help the growth and seedlings development, although does not present the best cost and benefit from the economic point of view by the low use of space.…”

Soursop seedlings: emergence and development under different cultivation environments and substrates – Part I

“…S1 = 25% H + 75% V; S2 = 50% H + 50% V; S3 = 75% H + 25% V; S4 = 25% H + 75% C; S5 = 50% H + 50% C; S6 = 75% H + 25% C; S7 = 25% M + 75% V; S8 = 50% M + 50% V; S9 = 75% M + 25% V; S10 = 25% M + 75% C; S11 = 50% M + 50% C; S12 = 75% M + 25% C; S13 = 33,3% H + 33,3% M + 33,3% V; S14 = 33,3% H + 33,3% M + 33,3% C; S15 = 25% H + 25% M + 25% V + 25% C. The high concentration of cassava branches (75%) in the substrates S4 and S10 may have reduced the moisture retention capacity due to the higher percentage of macropores, causing low size seedlings. The increase of macropores may be related to the particle size of the branches; in fact, COSTA et al (2011a) observed that more than 50% of milled cassava branches were retained in sieves with mesh of 2 mm.…”