Pedro Nagel

Dr. Pedro Nagel


Research Focus & Metrics

Academic Career Length

16Years (2011-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 December 2011 in Revista Ciência Agronômica
Verified
Journal Article
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ECEdílson Costa
Edílson Costa
LDLucas Gustavo Yock Durante
Lucas Gustavo Yock Durante
PNPedro Nagel
Pedro Nagel
CFCleber Rezende Ferreira
Cleber Rezende Ferreira
ASAdriano dos Santos
Adriano dos Santos
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. 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 the eggplant seedling. The Dickson quality index is a good indicator of the standard of quality of the eggplant seedlings

22 March 2024 in Notulae Botanicae Horti Agrobotanici Cluj-Napoca
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Journal Article
Open access
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SNSuzielly S.A. Nagel
Suzielly S.A. Nagel
ECEdílson Costa
Edílson Costa
PNPedro Nagel
Pedro Nagel
ASAbimael Gomes da Silva
Abimael Gomes da Silva
FBFlávio Ferreira da Silva Binotti
Flávio Ferreira da Silva Binotti
TDThaise Dantas
Thaise Dantas
The Dianthus caryophyllus L. occupies the second position of the best sold cut flowers after rose. The choice of the environment and the cultivation container is crucial for flower production because, besides permitting higher temperature, light, and relative humidity management, it also impacts yield. This study evaluated the cultivation of yellow carnation in different protected environments and pot colours. The experiment was conducted in a factorial 2 × 4 (greenhouse and nursery x blue, red, brown, and black pots; the black pot was considered the control treatment). The photosynthetically active radiation, substrate temperature, and meteorological variables in the environments were monitored during the experiment's conduction as well the growth and productivity variables. The greenhouse significantly reduced solar radiation, generating favourable conditions for the initial growth of carnation plants. The nursery maintained higher levels of solar radiation, stimulating its flowering. The cultivation in brown pots provided higher quality plants regarding both vegetative growth and flowering. Therefore, brown pots are an option to substitute the black pots traditionally used for flower production. The use of the blue pot negatively influenced the development of carnation plants.