Crescimento de planta, partição de assimilados e produção de frutos de melão amarelo sombreado por diferentes malhas

Pereira, Francisco Hevilásio Freire; Sá, Francisco Vaniés da Silva; Puiatti, Mário; Finger, Fernando Luíz; Cecon, Paulo Roberto

doi:10.1590/0103-8478cr20141134

Cited by 8 publications

(8 citation statements)

References 5 publications

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“…-jun., 2020 527 These results contradict Oliveira et al (2015a), who state that the watermelon cultivar 'Crimson Sweet' is more sensitive to shading, because it is prone to etiolation. Likewise, these results are also inconsistent with those obtained by Pereira et al (2015), who investigated the effect of shading by different nets on yellow melon.…”

Section: Discussioncontrasting

confidence: 88%

Salt Stress and Ambience on the Production of Watermelon Seedlings

Silva

Sousa

et al. 2020

Rev. Caatinga

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ABSTRACT The objective of this study was to evaluate the production of watermelon seedlings irrigated with saline waters and cultivated in different types of environments and substrates. The experimental design was completely randomized with split-split plots, in which the plot corresponded to two growing environments (EN1 = full sun and EN2 = 50% shade black net), the subplot to two types of irrigation water (IW1 = 0.8 and IW2 = 2.5 dS m-1) and the sub-subplot to four types of substrates (SB1 = vermiculite + coconut fiber, SB2 = manure + soil, SB3 = carbonized rice husk + soil, SB4 = biochar + soil), with four replicates of twenty-five seeds. The variables analyzed were: emergence percentage (EP), emergence speed index (ESI), mean time of emergence (MTE), number of leaves (NL), stem diameter (SD), seedling height (SH) and root length (RL), shoot dry mass (SDM), root dry mass (RDM) and total dry mass (TDM). The EN2 treatment provided better conditions for emergence and initial growth, and EN1 was also favorable to the emergence and initial growth of watermelon seedlings, when the substrates SB1 and SB2 were used.

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Section: Discussioncontrasting

confidence: 88%

Salt Stress and Ambience on the Production of Watermelon Seedlings

Silva

Sousa

et al. 2020

Rev. Caatinga

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“…In general, diff erences in light conditions may lead to variations in chlorophyll content (Brant et al, 2011) and thus refl ect on biomass. The RCD of seedlings exposed to 0% shading was probably restricted by the strong sunlight and substrate drying up, which compromise photosynthesis (Pereira et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

Evaluation of the Growth and Survival of Mangrove Seedlings Under Different Light Intensities: Simulating the Effect of Mangrove Deforestation

Silva

Maia

2019

Rev. Árvore

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Environmental factors, especially light, temperature, and edaphic conditions are of great importance for the establishment of plant communities. In areas degraded by deforestation, these factors can vary greatly, which may affect the recolonization of the typical populations in the altered area. This study evaluated the development of seedlings of pioneer mangrove species under different levels of shading in soil substrate degraded by deforestation, aiming to assess the effect of deforestation on the recolonization of mangrove forests, which may be of help in the production of seedlings and recovery of deforested areas. The study was conducted in the municipality of Acaraú in the state of Ceará, Brazil. The species Avicennia schaueriana Stapf and Leechm. ex Moldenke (1939) and Laguncularia racemosa C. F. Gaertn (1807) were used in the study, and the substrate was collected from an area impacted by deforestation. The propagules and seedlings were exposed to full sun and 30, 50 and 70% shading. The results revealed that the treatment at full sun had the lowest germination rate of 86.66% for L. racemosa. Seedlings of both species showed a significant difference and better quality between shading treatments and full sun. The height of the seedlings showed a correlation above -0.90 with ambient temperature. L. racemosa tested in full sun had a viable seedling reduction of 50% and A. schaueriana was superior. It is concluded that the natural regeneration of a mangrove area can be compromised under the conditions of total deforestation with high sun exposure and degraded soils. Human intervention in providing 50% shading is essential for the development of seedlings and regeneration of the area impacted by deforestation.

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“…This species is considered a C3 cycle plant; however, it demands solar radiation and temperature. In this context, the semiarid region of Northeast Brazil stands out as promising for the cultivation of melon due to the record of high radiation levels that can exceed 3,000 h of sunlight in the year (Pereira et al 2015). On the other hand, excessive sunlight on plants can be prejudicial to photosynthesis because the efficiency of the photosynthetic process is severely reduced in these conditions, after all, when the leaves are exposed to more light than they can use, that is, above from the saturation point, the photosynthetic apparatus is damaged and becomes inactive due to photoinhibition (Brant et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Use of colored agrotextiles and length of stay in the cultivation of yellow melons

Oliveira

Queiroga

Costa

et al. 2021

RSD

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The coverage of plants with agrotextiles of different colors and length of stay may influence the productivity of the crop. The objective of this study was to evaluate the influence of the use of colored agrotextiles and their length of stay on the cultivation of melon plants in the conditions of the semiarid region of Paraíba. The experiment was fulfilled out at the Experimental Farm of the Federal University of Campina Grande, located in the municipality of São Domingos – PB. The treatments were distributed in a randomized block design in a 4 x 4 factorial scheme, with four repetitions and consisting of four colors of agrotextile (orange, white, gray, and blue) and four lengths of stay (15, 18, 21, and 24 days after transplanting). The following characteristics were evaluated: active photosynthetic radiation, average temperature, number of fruits per plant, average fruit mass and total productivity. The use of colored agrotextiles associated with the length of stay promoted a change in the production characteristics of the yellow melon fruits. The highest productivity, number of fruits, and mass of the melon fruits were obtained when the plants were covered with the orange-colored agrotextile at 15, 18, and 24 days after transplantation, respectively. The long stay of the agrotextile affected the content of total soluble solids.

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Crescimento de planta, partição de assimilados e produção de frutos de melão amarelo sombreado por diferentes malhas

Cited by 8 publications

References 5 publications

Salt Stress and Ambience on the Production of Watermelon Seedlings

Salt Stress and Ambience on the Production of Watermelon Seedlings

Evaluation of the Growth and Survival of Mangrove Seedlings Under Different Light Intensities: Simulating the Effect of Mangrove Deforestation

Use of colored agrotextiles and length of stay in the cultivation of yellow melons

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