Densidade de plantas e número de drenos influenciando a produtividade de roseiras cultivadas em vaso

Viana, Thales Vinícius de Araújo; Alves, Alexandre M; Sousa, V. F. de; Azevedo, Benito Moreira de; Furlan, Raquel Aparecida

doi:10.1590/s0102-05362008000400021

Cited by 3 publications

(2 citation statements)

References 3 publications

(1 reference statement)

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“…Em contrapartida, o excesso hídrico faz com que a água ocupe grande parte do espaço poroso do solo/substrato, reduzindo a pressão de oxigênio (hipóxia) ou mesmo ocasionando a ausência deste (anóxia), reduzindo a produção de energia direcionada para a síntese, translocação e absorção ativa dos compostos (NAVROSKI et al, 2015;VIANA et al, 2008). Para Rêgo et al (2004), quantidade insuficiente de oxigênio na zona radicular reduz tanto a fotossíntese quanto as formas solúveis de nutrientes para as plantas, interferindo diretamente no crescimento destas.…”

Section: Resultsunclassified

ACLIMATIZAÇÃO DE MUDAS MICROPROPAGADAS DE Anthurium maricense COM DIFERENTES LÂMINAS DE IRRIGAÇÃO

Campos

Bomfim

Carvalho

et al. 2019

R_I

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ACLIMATIZAÇÃO DE MUDAS MICROPROPAGADAS DE Anthurium maricense COM DIFERENTES LÂMINAS DE IRRIGAÇÃO ARLENE SANTISTEBAN CAMPOS1; GUILHERME VIEIRA DO BOMFIM2; ANA CRISTINA PORTUGAL PINTO DE CARVALHO3; BENITO MOREIRA DE AZEVEDO2; ANA CECÍLIA RIBEIRO DE CASTRO3 E DENISE VIEIRA VASCONCELOS4 1Departamento de ciência do solo, Universidade Federal do Ceará, Av. Mister Hull, 2977, Campus do Pici, CEP: 60356-001, Fortaleza, Ceará, Brasil, arlenesan@yahoo.com.br. 2Departamento de engenharia agrícola, Universidade Federal do Ceará, Av. Mister Hull, 2977, Campus do Pici, CEP: 60356-001, Fortaleza, Ceará, Brasil, guile2007@gmail.com, benito@ufc.br. 3Embrapa Agroindústria Tropical, Rua Pernambuco, 2270, Pici, CEP 60511-110, Fortaleza, Ceará, Brasil, cristina.carvalho@embrapa.br, cecilia.castro@embrapa.br. 4Instituto Federal de Educação, Ciência e Tecnologia do Pará, Estrada de Ferro de Bragança, s/nº, Taíra, CEP: 68600-000, Bragança, Pará, Brasil, denisevasconcelos@hotmail.com. 1 RESUMO O objetivo deste trabalho foi avaliar a influência de diferentes lâminas de irrigação na aclimatização de mudas micropropagadas de Anthurium maricense. O delineamento experimental foi o completamente ao acaso, composto por cinco tratamentos e quatro repetições de quatro mudas cada. Os tratamentos foram as lâminas de irrigação estimadas com cinco percentuais da capacidade de retenção de água (CRA) do substrato: 50; 75; 100; 125; e 150% da CRA. As mudas foram cultivadas individualmente em vasos de 415 mL contendo o substrato comercial HS Flores®. Durante a aclimatização, as mudas foram irrigadas duas vezes ao dia e receberam adubações foliares em dias alternados. Foram analisadas as variáveis: incremento na altura da muda (IAM); incremento no número de folhas por muda (INF); incremento na área da maior folha (IAMF); ocupação de vaso (OV); taxa de fotossíntese líquida (A); carbono interno (Ci); e temperatura (Ti) e umidade (Ui) foliar. Com base nos resultados, supõe-se que as mudas de A. maricense possam apresentar evidência de resistência ao déficit hídrico. A lâmina de irrigação estimada com 150% da CRA proporciona o maior valor de IAMF. Lâminas de irrigação intermediárias, entre 100 e 125% da CRA, proporcionam os maiores valores de IAM, INF e OV. Palavras-chave: antúrio, plantas ornamentais, manejo da irrigação. CAMPOS, A. S.; BOMFIM, G. V. do; CARVALHO, A. C. P. P. de; AZEVEDO, B. M. de; CASTRO, A. C. R. de; VASCONCELOS, D. V. ACLIMATIZATION OF MICROPROPAGATE PLANTLETS OF Anthurium maricense WITH DIFFERENT IRRIGATION DEPHTS 2 ABSTRACT The aim of this study was to evaluate the development of micropropagated plantlets of Anthurium maricense during the acclimatization phase in screen environment, under different irrigation depths based on percentages of water retention capacity (WRC), on the weather conditions in the greenhouse environment. The experimental design was completely randomized, composed of five irrigation depths, with four replicates and four plantlets per plot. The treatments consisted of irrigation depths estimated with five levels of water retention capacity (WRC) of the substrate: 50; 75; 100; 125; and 150% of WRC. The plantlets were cultivated in 415 mL pots with HS Flowers® substrate. During the acclimatization, all plantlets were irrigated twice a day and fertilized, on alternate days, with leaf fertilization. The variables analyzed were: plant height increment (PHI); number of leaves increment (NLI); largest leaf area increment (LLAI); pot occupation (PO); net photosynthetic rate (A); internal carbon (Ci); leaf temperature (Ti) and leaf moisture (Ui). Based on the results obtained, it is assumed that A. maricense micropropagated plantlets may present evidence of resistance to water deficit. The estimated irrigation depth of 150% of WRC provides the highest value of LLAV. Intermediate irrigation depth, between 100 and 125% of the WRC, provide the highest values of PHV, NLV and PO. Keywords: anthurium, ornamental plant, irrigation management.

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Section: Resultsunclassified

ACLIMATIZAÇÃO DE MUDAS MICROPROPAGADAS DE Anthurium maricense COM DIFERENTES LÂMINAS DE IRRIGAÇÃO

Campos

Bomfim

Carvalho

et al. 2019

R_I

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“…In addition to choosing the cultivar, managing the number of plants per area is a vital tool in obtaining the highest possible number of fruits in new hybrids (Kultur et al 2001, Goreta et al 2005. This is because the number of stems per plant and number of plants per pot directly affect the availability of water and nutrients and promote changes in the root architecture, associated with a larger root volume, better nutrient uptake and more vigorous plants (Viana et al 2008).…”

Section: Palavras-chavementioning

confidence: 99%

Number of stems and plant density in mini watermelon grown in a protected environment

Gomes

Santos

Braz

et al. 2019

Pesqui. Agropecu. Trop.

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Watermelon farming has a high economic and social importance. In parallel, the consumers’ demand for distinctive products has led to niche markets, where mini watermelons stand out. This study aimed to assess the agronomic performance and fruit quality of mini watermelon grown in coconut husk fiber, as a function of number of stems per plant and plant density. The Smile hybrid was used, as well as a randomized block design, in a 2 x 2 factorial scheme, with eight repetitions, being the first factor the number of stems per plant (1 or 2) and the second the number of plants per pot (1 or 2). Characteristics related to yield, physiological parameters and fruit quality were assessed. Interaction between number of stems and plant density was only observed for leaf area, average fruit fresh weight, total yield and percentage of large fruits. The factors were evaluated separately for the remaining traits. Two-stemmed training systems, at a density of one plant per pot, produce the highest yield, without compromising the quality of the fruits, being, in these conditions, the most suitable method for farmers.

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Assessment of alternative methods for analysing maximum rainfall spatial data based on generalized extreme value distribution

Ferreira,

Liska,

Beijo

2024

Discov Appl Sci

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The present study aimed to analyze and spatially model maximum rainfall in the southern and southwestern regions of Minas Gerais using spatial statistical methods. Daily data on maximum rainfall were collected from 29 cities in the region. To obtain predictions of maximum rainfall for return periods of 2, 5, 10, 50, and 100 years, Bayesian Inference was employed, utilizing the most appropriate prior for each locality. The spatial analysis of the phenomenon based on results obtained through Bayesian Inference was conducted using interpolation methods, including Inverse Distance Weighting (IDW) and Kriging (Ordinary Kriging (OK) and Log-Normal Kriging (LK)). Different semivariogram models were used, and the most suitable one was selected based on cross-validation results for each method, which were also compared to those of IDW. Additionally, a spatial analysis was carried out using max-stable processes and spatial Generalized Extreme Value (GEV) distribution, with the models evaluated based on Takeuchi’s Information Criteria. All models were also assessed by calculating the mean prediction error for six locations that were not used in model fitting. The results indicated that the most suitable models among Kriging and IDW for return periods of 2, 5, and 10 years were Gaussian (LK), Spherical (OK), and Wave (OK), respectively. Among the max-stable models and spatial GEV, the most suitable for modeling was the Smith max-stable model. Consequently, for spatial prediction over 50- and 100-year return periods, OK (Wave) and the Smith max-stable model were employed.

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Densidade de plantas e número de drenos influenciando a produtividade de roseiras cultivadas em vaso

Cited by 3 publications

References 3 publications

ACLIMATIZAÇÃO DE MUDAS MICROPROPAGADAS DE Anthurium maricense COM DIFERENTES LÂMINAS DE IRRIGAÇÃO

ACLIMATIZAÇÃO DE MUDAS MICROPROPAGADAS DE Anthurium maricense COM DIFERENTES LÂMINAS DE IRRIGAÇÃO

Number of stems and plant density in mini watermelon grown in a protected environment

Assessment of alternative methods for analysing maximum rainfall spatial data based on generalized extreme value distribution

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