Growth of black pepper plantlets under different substrates and irrigation levels

Cruz, Eleandro Silva da; Médici, Leonardo Oliveira; Leles, Paulo Sérgio dos Santos; Ambrozim, Clodoaldo Spadeto; Souza, Wendell Luccas; Carvalho, Daniel Fonseca de

doi:10.1590/1678-992x-2020-0094

Cited by 4 publications

(6 citation statements)

References 17 publications

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“…This standard table can be used as the basis for controlling a nutrient management system adaptively. Other nutrient systems are solely based on pH, electrical conductivity, ammonia, and nitrate levels on the water system without considering the essential yield parameters, such as indicated in Table 3 [5,6,11]. As a significant microscopy result of optimized environment condition, the xylem vessels of transected stems, stomata presence, and leaf intracellular chloroplast formation of unoptimized and optimized lettuces were visualized and characterized (Figs.…”

Section: Photosynthetic and Respiration Rates Assaymentioning

confidence: 99%

“…Crops, such as corn, rice, tomato, and lettuce, are vulnerable to climate change resulting in lower biomass production [5], [9], [10]. The initial tendency to improve crop quality is through adjusting the irrigation and fertigation [11], air velocity [12], and spectral filters [13]. When the temperature rises to 30 °C in long term scenario, many leafy vegetables experience retardation in growth, and the worst is they will naturally speed up the senescence stage.…”

Section: Introductionmentioning

confidence: 99%

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Hybrid Genetic Programming and Multiverse-based Optimization of Pre-Harvest Growth Factors of Aquaponic Lettuce Based on Chlorophyll Concentration

Concepcion¹,

Dadios²,

Cuello³

et al. 2021

International Journal on Advanced Science, Engineering and Information Technology

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Optimizing photosynthesis is vital in maintaining quality farm produce in the agricultural food production sector. The nonlinear behavior of the interaction of crop pre-harvest growth factors can promote or retard its growth. This study employed multigene symbolic regression genetic programming (MSRGP) in developing the chlorophyll-a fitness function allied with bioinspired algorithms, namely genetic algorithm (GA), particle swarm optimization (PSO), and multiverse optimization (MVO), in determining the ideal combination of carbon dioxide, light intensity, air temperature, and humidity that will induce photosynthesis based on aquaponic lettuce (Lactuca sativa var. Altima) leaf chlorophyll-a concentration. Light spectra were characterized through the floating leaf disk technique, which resulted in white spectra as the most photosynthetic conducive based on the light reaction and dark respiration. Leaf spectro-textural-morphological signatures were extracted for non-destructive MSRGP chlorophyll-a concentration measurement. Carbon dioxide and humidity have a strong positive impact on chlorophyll-a concentration. Photosynthesis is impeded by Vis/IR above 7.817. The hybrid MSRGP-MVO generated the ideal global solution of 880.744 ppm of CO2, 543.147 μmol m -2 s -1 of the visible white light spectrum, 22.238 °C air temperature, and 67.742% humidity which resulted in 651.144 mg g -1 of Chl-a, 0.934 leaf weight ratio, 0.066 roots to shoot ratio, 141 xylem vessels mm -2 127.389 stomata mm -2 , and more prominent intracellular chloroplast concentration for the harvest stage lettuce. The established standard for fresh weight, chlorophylls a and b, and vitamin C concentrations are essential for developing an adaptive nutrient management system to maintain the expected growth signatures of lettuce at the end of the 6-week cultivation cycle.

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Section: Photosynthetic and Respiration Rates Assaymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hybrid Genetic Programming and Multiverse-based Optimization of Pre-Harvest Growth Factors of Aquaponic Lettuce Based on Chlorophyll Concentration

Concepcion¹,

Dadios²,

Cuello³

et al. 2021

International Journal on Advanced Science, Engineering and Information Technology

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show abstract

“…Water stress can severely affect the productivity and development of black pepper plants. During plantlet production, irrigation and a deficit of up to 15 % proved to be viable, causing no significant changes in the biometric traits or chlorophyll content of 'Bragantina' black pepper plantlets (Cruz et al, 2022).…”

Section: Introductionmentioning

confidence: 97%

“…Despite being considered a water-stress-sensitive crop (Krishnamurthy et al, 2016), there are no studies related to its water demand and/or its response to water deficit under tropical conditions (Cruz et al, 2022), including the initial development following the plantlet production phase. However, this information is necessary, especially in Brazil where the crop grows in different environments in terms of soil and climate.…”

Section: Introductionmentioning

confidence: 99%

Yield response factor (Ky) and initial growth in black pepper in a tropical environment

Carvalho

Teles

Cruz³

et al. 2023

Sci. agric. (Piracicaba, Braz.)

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Black pepper is widely produced in Brazil, though there are few studies related to its water requirements and the effects of water deficit (WD) applied under tropical conditions.The growth, sensitivity to WD, and first-year productivity of irrigated plants from the Bragantina cultivar were evaluated, employing an irrigation system with automatic management. The plants were cultivated in plastic pots installed in the field for 391 days using emitters with different flow rates (2.2 [T1], 3.3 [T2], 4.3 [T3], and 5.3 L h -1 [T4 -control]). Fresh weight of the leaves, stems, and shoots, and dry weight of the leaves, stem, roots, and shoots as well as the total dry weight of the plant, were evaluated. Productivity was determined by evaluating the grains and spikes from a single harvest. Yield results and the actual versus maximum evapotranspiration rate for the entire growing season was used for calculating the Ky coefficient. Despite 1,346 mm of rainfall, the irrigation system was activated 165 times, distributing a mean volume of 19.0 (T1), 28.5 (T2), 37.1 (T3), and 45.8 L per plant (control). All traits were negatively affected by the WD, and the Ky values obtained (from 1.72 to 2.96) indicate the high sensitivity of black pepper to WD. In general, the spikes produced with at least 81 % of the crop water demand were larger and more numerous than those subjected to inferior treatments. WD occurring during the flowering stage severely hampers the size, weight, and quality of the spikes and grains of black pepper.

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“…Water management in response to the crop water requirements can be done automatically, contributing to the maximization crop yield. The simplified irrigation controller (SIC) proposed by Medici et al (2010), which operates in response to soil water tension, has been successful used in several environments (Gomes et al, 2017;Mello et al, 2018;Bueno et al, 2021;Cruz et al, 2022) and it stands out for being low cost and easy to operate (Valença et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Production and initial growth of forest species seedlings using sewage sludge and automated irrigation

et al. 2021

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Traditionally, irrigation management has not been used in forest nurseries, compromising the efficiency of the system and the quality of seedlings. In this study, we evaluated the quality of seedlings under different irrigation levels and the substrate composed of pure biosolid, and the initial growth of three Atlantic Forest tree species, produced with automated irrigation management. Four irrigation levels (V1 to V4) were applied by dripping on Schizolobium parahyba (Vell.) Blake, Cytharexyllum myrianthum Chamiáo and Ceiba speciosa Ravenna seedlings. After that, the seedlings were planted to evaluate their early growth in pots. The water was applied in response to species requirement and the volume was measured by water flow sensors, connected to an Arduino MEGA board. Height, collar diameter, leaf area, dry mass and chlorophyll content measurements were used to assess plant development on the seedling and early growth stages. Seedlings that received the highest average volume of water (V4) had a higher rate of growth in height and collar diameter for the three species studied. Despite this, the seedlings that received a smaller volume of water (V1) achieve similar size than V4 ones in pots. The plant growth and quality data, in the two phases analyzed, together with the aggregation of the substrate, indicate that the ideal irrigation level is linked to treatments that received the highest volumes of water (V3 and V4) in the seedling production phase. The results obtained indicate that it is possible to save water and produce seedlings of forest species with quality, ensuring their survival in the field.

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Growth of black pepper plantlets under different substrates and irrigation levels

Cited by 4 publications

References 17 publications

Hybrid Genetic Programming and Multiverse-based Optimization of Pre-Harvest Growth Factors of Aquaponic Lettuce Based on Chlorophyll Concentration

Hybrid Genetic Programming and Multiverse-based Optimization of Pre-Harvest Growth Factors of Aquaponic Lettuce Based on Chlorophyll Concentration

Yield response factor (Ky) and initial growth in black pepper in a tropical environment

Production and initial growth of forest species seedlings using sewage sludge and automated irrigation

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