Agronomic performance of lettuce cultivars in different seasons and shading conditions

Carini, Fernanda; Filho, Alberto Cargnelutti; Kleinpaul, Jéssica Andiara; Neu, Ismael Mario Márcio; Silveira, Daniela Lixinski; Pacheco, M. G.; Andriolo, Jerônimo Luiz

doi:10.4067/s0718-34292020000100047

Cited by 4 publications

(5 citation statements)

References 7 publications

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“…However, when analyzing the SS treatment, the above premise was not met. The results obtained for the CS and FS treatments were consistent with the results published in previous investigations [52][53][54][55] but these do not coincide with the result of the SS treatment. In Figure 12, the blue arrows mark the trend of radiation, and the orange arrows mark the trend of expected production.…”

Section: Discussionsupporting

confidence: 85%

Lettuce Production under Mini-PV Modules Arranged in Patterned Designs

et al. 2021

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The growing need for clean energy and food production are favoring the use of underused spaces, such as rooftops. This study aims to demonstrate the compatibility of the use of rooftops both for the production of photovoltaic energy and for the production of food, despite the fact that both compete for the same resource, sunlight (rooftop agrivoltaic). In the experiment reported in this study, which was carried out in Almería (Spain) during the spring and summer of 2021, three shade treatments were tested for a lettuce crop, produced by photovoltaic modules with different arrangements: concentrated shade (CS), scattered shade (SS) and full sun (FS). This experiment was repeated in two seasons with high radiation levels and temperature. The results show that in these environmental conditions, the cultivation of plants that demand little sunlight, such as lettuce, is compatible with the shading produced by photovoltaic panels. In addition, it is shown that the same percentage of the area covered with shade (22%), but using mini-PV modules arranged in patterns, improves the productivity (fresh weight, dry matter, number of leaves, maximum length and dry matter of roots) of lettuce cultivation, both in spring and summer.

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Section: Discussionsupporting

confidence: 85%

Lettuce Production under Mini-PV Modules Arranged in Patterned Designs

et al. 2021

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“…These values are higher than those reported by Ferreira et al (2021), who obtained mean commercial fresh mass of 222.71 and 250.70 g plant -1 , with the most productive cultivars when evaluating six cultivars of American lettuce. Likewise, the mean obtained with Dora is higher than that reported by Carini et al (2020), who, evaluating American lettuce cultivars in the autumn-winter period in Santa María, Rio Grande do Sul, Brazil, mention that the Gloriosa cultivar with fresh mass between 530.76 and 547.81 g plant -1 was the most productive. An experiment carried out by Yuri et al (2017) in Petrolina, Pernambuco, Brazil, reported that in the same period in which this research was carried out Volumen 36 (2024) BIOAGRO N° 1…”

Section: Shade Colorcontrasting

confidence: 57%

Production of American lettuce cultivars under different colored shade nets

Enciso-Garay,

Godoy Medina,

Santacruz Oviedo

et al. 2024

Bioagro

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Shading nets are used to reduce the amount of radiant energy reaching crops. The objective of the work was to compare the influence of black and red shading nets on the production of nine American lettuce cultivars in the Autumn period under the conditions of the Central Department of Paraguay. The experiment was carried out in the Experimental Field of the Departmental Agronomic Center (CAD) in the Municipality of Julián Augusto Saldívar. The treatments consisted of the combination of two types of shading netting (red with 35% shade and black with 35% shade) and nine cultivars of American lettuce (Julia, Dora, Angelina, Tainá, Sun Valley, Betty, Lucy Brown, Mara, and Serena) totaling 18 treatments. The experiment consisted in a complete randomized block design, arranged in split blocks 2×9 (the color of shading netting was considered the main plot, and the lettuce cultivars as the secondary plot) with four repetitions. Each experimental unit consisted of four crop rows with seven plants. Plant diameter, plant height, head diameter and height, commercial number of leaves per plant, fresh mass, and commercial productivity were evaluated. The data were subjected to analysis of variance, and when differences were found, the means were compared by the Scott-Knott test at 5% probability. The results indicate that using the red netting with the Serena and Dora cultivars provides greater fresh mass and commercial production.

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“…Suboptimal temperatures can have a serious effect on crop yield, with temperatures too low allowing no plant growth and too high causing heat stress and crop spoilage [ 24 , 25 ]. Different varieties necessitate slightly different conditions, and certain seasons may be more appropriate than others, especially as lettuce varieties exhibit diverse behaviours, particularly obvious when exposed to too high temperatures and solar radiation [ 26 ]. Despite this, the ecological requirements for lettuce are fairly forgiving, yet its physiology is still significantly influenced by growing conditions.…”

Section: Discussionmentioning

confidence: 99%

Let-Us Investigate; A Meta-Analysis of Influencing Factors on Lettuce Crop Yields within Controlled-Environment Agriculture Systems

Gargaro,

Murphy,

Harris

2023

Plants

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Climate change-related impacts have hampered the productivity of agricultural lands in recent times, affecting food security globally. Novel technology-based agricultural production systems such as controlled-environment agriculture (CEA) are a way to reduce the impact of climatic variation and pests that harm current global crop production and ensure consistent crop development. These systems often use artificial lighting and soilless mediums to produce crops. This meta-analysis has investigated the key influencing factors on crop production within these systems, using previous studies on lettuce (the most cultivated crop in these systems) to understand what affects yield within CEA. This analysis has found that on average, CEA systems yield twice that of field-based agriculture (3.68 kg m−2 vs. 1.88 kg m−2), with the most influencing factors being the variety of cultivars grown, the season, the nutrient delivery method, and the lighting type. The cultivation time for this study was 40 days, with 94% of papers having trial periods of 70 days or less, much lower than field-based agriculture (60–120 days). Vertical farming (stacked vertical CEA cultivation) studies were found to especially drive up yield per area (6.88 kg m−2). The results of this meta-analysis are useful for starting to understand the key influencing factors on CEA growth and highlight the breadth of research ongoing in the CEA industry.

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Agronomic performance of lettuce cultivars in different seasons and shading conditions

Abstract: The objectives of this study were to evaluate the agronomic performance of nine lettuce cultivars (Gloriosa,

Cited by 4 publications

References 7 publications

Lettuce Production under Mini-PV Modules Arranged in Patterned Designs

Lettuce Production under Mini-PV Modules Arranged in Patterned Designs

Production of American lettuce cultivars under different colored shade nets

Let-Us Investigate; A Meta-Analysis of Influencing Factors on Lettuce Crop Yields within Controlled-Environment Agriculture Systems

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