Trocas gasosas e fitomassa seca da cultura do meloeiro irrigado por gotejamento nas condições semiáriadas do Nordeste

Filho, João Valdenor Pereira; Bezerra, Francisco Marcus Lima; Chagas, Keivia Lino; Tiago,; Silva, Cavalcante da; Cristina, Carmem; Pereira, Mareco de Sousa

doi:10.7127/rbai.v9n300286

Cited by 4 publications

(6 citation statements)

References 8 publications

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“…These results support the fact that the transpiration rate in melons increases under optimal water conditions, and this is related to (gs) since stomata are the major path for water loss in the plant (Pereira-Filho, Bezerra, Chagas, Silva, & Pereira, 2015). Reduced stomatal conductance induced by water stress contributed to decreased CO2 assimilation via diffusion, as the internal CO2/external CO2 ratio (CI/CA) in the 1 st sampling (15 DAT) of 'Piel de Sapo' showed a significant and three-way interaction with irrigation rates and the 1 st sampling ( Figure 5) when adjusted by the quadratic polynomial method, which did not occur in 'Amarelo'.…”

Section: Resultssupporting

confidence: 77%

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Gas exchanges of melon under water stress in the Submedium region of the São Francisco River Valley

et al. 2019

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The current scenario of increased water scarcity is due to climate change and directly affects food production. It is thus necessary to develop strategies to mitigate the impacts of low water availability. Therefore, the goal of the present study is to evaluate the physiological behaviour of melon cultivars under water stress. The experiment was conducted in a protected environment in the experimental Submedium region of the São Francisco River Valley in the period ranging from October to December. In this study, we used the melon cultivars 'Amarelo' and 'Piel de Sapo'. The experiment was conducted in a randomized block design with three replicates that were subdivided into plots, where the plots were comprised of four irrigation rates (50, 75, 100, and 125% of crop evapotranspiration – CET), subplots were comprised of the two melon cultivars, and sub-subplots were comprised of samplings for physiological analyses (15, 30, and 45 days after transplanting). The parameters evaluated were stomatal conductance, transpiration, net photosynthesis, relationship CI/CA, and accumulated dry matter. Water stress reduced the stomatal conductance, transpiration, net photosynthesis, CI/CA, and accumulated dry matter. 'Piel de Sapo' showed a higher photosynthetic adjustment than 'Amarelo' melon due to the gas exchange behaviour of the former, and it was, therefore, more tolerant to water stress.

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Section: Resultssupporting

confidence: 77%

“…The results of the present study are also in line with the studies by Pereira-Filho et al (2015), Ferraz et al (2011), and Tomaz, Porto Filho, Medeiros, Dutra, and Queiroz (2008), who studied melon and found that reductions in leaf dry matter contents were caused by water stress.…”

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confidence: 93%

Gas exchanges of melon under water stress in the Submedium region of the São Francisco River Valley

et al. 2019

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“…On the other hand, lower values of leaf area were noted with 40% ETo rates, which demonstrates the sensitivity of melon plants to the lower water availability in the soil. In accordance with Pereira Filho et al (2015), the increase of stomatal resistance and the decrease of CO 2 influx determine the lowest water loss due to transpiration, besides being able to affect the photosynthesis. This is related to the lower stomatal conductance (gs) due to soil water deficit, which caused a reduction in the net photosynthesis (A) and, consequently, decrease of leaf expansion, fact observed in Juazeiro melon, which validates the positive and significant correlation observed for these variables (Table 1).…”

Section: Resultsmentioning

confidence: 94%

“…However, especially due to irregular rainfall, melon fruit production has been dropping in the last few years in this region. According to Pereira Filho et al (2015), melon plants growth, development, and fruit production are greatly affected by climate conditions, mainly by water stress.…”

Section: Introductionmentioning

confidence: 99%

Physiology and yield of piel de sapo melon (Cucumis melo L.) under water deficit in semi-arid region, Brazil

Melo¹,

Dias²,

Dutra³

et al. 2020

Biosci. J.

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Melon (Cucumis melo L.) is a crop of great socioeconomic importance in regions with semiarid climate, as found in Northeast Brazil. In this region water deficit is a usual condition as well as the main reduction factor of plant productivity. Due to this phenomenon, irrigation techniques are used to make available the amount of water needed for plant production. Therefore, this research evaluated the physiology and fruit production changes of ‘Juazeiro’ Piel de sapo melon plants under different water replacement rates. ‘Juazeiro’ melon was grown under four reference evapotranspiration replacement rates (40, 60, 80 and 100% of ETo) distributed randomly in blocks with 5 replicates. The plants were cultivated in the field, in an experimental area located in the Brazilian Northeast region, under hot and dry semiarid climatic conditions, and during the growing cycle the ‘Juazeiro’ hybrid melon plants were evaluated for leaf area, biomass accumulation, gas exchange, photochemical efficiency of photosystem PSII and production of fruits per plant. Application of water replacement rates of 100% ETo leads to highest growth, net photosynthesis, and fruit yield of 'Juazeiro' melon. Water replacement at 80% ETo can be used for ‘Juazeiro” melon under semiarid climatic conditions, but with small losses in fruit yield. Water replacement below 80% ETo leads to drastic reductions in growth, gas exchanges, quantum efficiency of photosystem II and fruit yield, which impairs melon production in semi-arid climate environments.

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“…According to Köppen's classification, the climate of the region is BShw', hot semi-arid, with mean annual rainfall of 806.5 mm, concentrated from January to April, and mean temperatures between 22 and 28 ºC (Pereira Filho et al, 2015). The soil of the area was classified as Fluvic Neosol (alluvial soils) (Santos et al, 2013) and its chemical and physical characteristics are presented in Table 1.…”

Section: Methodsmentioning

confidence: 99%

Characterization of Organic Wastes and Effects of Their Application on the Soil

Oliveira¹,

Costa²,

Souza³

et al. 2018

JAS

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The agricultural farming activities generate organic waste whose indiscriminate deposition can be prejudicial to the environment. However, careful application of these wastes as organic fertilizers it is a possibility to improve soil fertility. This study aimed to confirm the hypotheses that organic wastes produced in various production chains in the semi-arid region of Ceará have contents of nutrients that give them potential as organic fertilizers and, since they are used as organic fertilizers, these residues improve the chemical soil attributes. Nutrient contents were determined at the laboratory and then the wastes were placed in decomposition bags and applied in a Fluvic Neosol. Soil samples were collected in the 0-0.10 m layer 90 days after wastes were applied. The residues presented nutrient contents that allow their use as organic fertilizers, except the shrimp farming residue that presented sodium content above that allowed by legislation, resulting also in higher element contents in the soil. In addition, the shrimp farming showed the lowest organic carbon content in relation to others chemical elements. The residues of the poultry industry and the compound made with residues of small ruminants presented the highest of nitrogen and phosphorus levels. The carnauba residue was associated with phosphorus immobilization because it presented C/P ratio higher than 300.

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Trocas gasosas e fitomassa seca da cultura do meloeiro irrigado por gotejamento nas condições semiáriadas do Nordeste

Cited by 4 publications

References 8 publications

Gas exchanges of melon under water stress in the Submedium region of the São Francisco River Valley

Gas exchanges of melon under water stress in the Submedium region of the São Francisco River Valley

Physiology and yield of piel de sapo melon (Cucumis melo L.) under water deficit in semi-arid region, Brazil

Characterization of Organic Wastes and Effects of Their Application on the Soil

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