Superabsorbent Polymers and Sanitary Sewage Change Water Availability During the Cowpea Emergence Phase

Araújo, Edcássio Dias; Assis, Miquéias Oliveira; Guimarães, Claudinei Martins; Araújo, Eduardo Fontes; Borges, Alisson Carraro; Cunha, Fernando França

doi:10.31413/nat.v12i1.16922

Cited by 2 publications

(4 citation statements)

References 47 publications

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“…Another important factor regarding soil surface moisture is thermal regulation (Figure 2). This condition is favorable for the germination and proper establishment of cowpea during the hottest periods of the year because water present on the surface mitigates soil temperature [29]. Lower soil temperature reduces hypocotyl constriction and minimizes other physicochemical damage to seedlings, negatively affecting their establishment.…”

Section: Discussionmentioning

confidence: 99%

Impacts on Soil and Cowpea Plants Fertigated with Sanitary Sewage through Subsurface Drip Irrigation

Araújo,

Ferreira,

Oliveira

et al. 2024

Water

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The application of sanitary sewage using subsurface drip irrigation can mitigate current challenges related to water availability and food production. However, before implementing these techniques, it is crucial to conduct studies to assess their impacts on soil and plants. The objective of this study was to evaluate chemical changes in the soil and the development of cowpeas subjected to sanitary sewage applied by drippers with different flow rates and installation depths. Drippers were positioned at various depths (0 to 30 cm) and operated with flow rates of 1.6 and 3.8 L h−1. Cowpeas were cultivated in pots with clayey soil, using synthetic sanitary sewage based on the maximum limit of nitrogen fertilization. Irrigation management was controlled in terms of soil moisture, which was monitored using TDR probes. The results indicated that reducing the depth of the drippers positively affected grain production and the development of cowpeas. Fertigation with sanitary sewage at greater depths increased soil phosphorus concentrations and base saturation. Dripper depth also influenced soil concentrations of phosphorus, potassium, calcium, and magnesium, while sodium concentrations decreased with greater depth. It is concluded that dripper flow rates did not impact soil chemical parameters or the agronomic characteristics of cowpeas. However, despite nutrient supply at greater depths, the subsurface drip irrigation system proved unsuitable for cowpea production in clayey soil.

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Section: Discussionmentioning

confidence: 99%

Impacts on Soil and Cowpea Plants Fertigated with Sanitary Sewage through Subsurface Drip Irrigation

Araújo,

Ferreira,

Oliveira

et al. 2024

Water

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“…To assess the effect of temperature on the germination of P. peruviana seeds, constant temperatures of 10,15,20,25,30,35, and 40 • C were tested. Additionally, an alternating temperature of 20/30 • C was tested, following the same procedure described in the germination test in Section 2.1.…”

Section: Influence Of Temperature On Seed Germination and Vigormentioning

confidence: 99%

“…Germination decreased from −0.2 MPa to −0.6 MPa, reaching zero at −0.8 and −1.0 MPa. Oliveira et al [65] evaluated different osmotic potentials (0; −0.1; −0.2; −0.3; −0.4; −0.5; and −0.6 MPa) and temperatures (25,30,35, and 20/30 • C) on the germination of Simira gardneriana seeds. The authors observed that decreasing osmotic potential and increasing temperature led to a reduction in seed germination.…”

Section: Experiments Ii: Germination and Vigor Of Seeds Under Differe...mentioning

confidence: 99%

“…The evaluation of seeds subjected to factors such as water deficit and temperature fluctuations, or the interaction of these, is crucial and recommended for defining optimal cultivation conditions and ensuring productive success [28,29]. These factors are among the most common and impactful, capable of reducing seedling emergence percentage, leading to uneven stand establishment, and consequently, reduced production [30].…”

Section: Introductionmentioning

confidence: 99%

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Germination Performance of Physalis peruviana L. Seeds under Thermal and Water Stress Conditions

de Freitas,

Gomes,

da Silva

et al. 2024

Agronomy

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Physalis peruviana holds significant economic value, making it crucial to determine optimal cultivation conditions, particularly concerning seed germination under varying water and temperature conditions. Therefore, this study aimed to assess the impacts of heat and water stress on the germination and vigor of P. peruviana seeds. The study was divided into two trials: the first examined the effect of constant temperatures of 10, 15, 20, 25, 30, 35, and 40 °C and alternating temperatures of 20 °C during the dark period and 30 °C during the light period (control) on seed germination and vigor. The second trial investigated germination and vigor under different water and thermal conditions using various osmotic potentials (0; −0.3; −0.6; and −0.9 MPa) and two temperatures (constant 30 °C and alternating 20 °C during the dark period and 30 °C during the light period). Both trials used a 16 h photoperiod. The germination tests revealed optimal (30 °C), moderate (20/30 °C), minimal (20 °C), and inhibited (40 °C) temperatures for the species’ germination. It was found that the first germination count could be conducted on the seventh day after sowing. Low water availability had negative effects on seed germination and vigor, especially at osmotic potentials below −0.45 and −0.61 MPa, combined with temperatures of 30 and 20/30 °C, respectively. Severe water stress, with osmotic potentials equal to or below −0.9 MPa, completely inhibited seed germination and vigor. Reduction in water potential and increased temperature resulted in a significant decrease in the percentage, speed, and quality of P. peruviana germination. These findings indicate that the species does not tolerate extreme temperatures, whether low (less than 15 °C) or high (greater than 35 °C), nor water stress with osmotic potentials lower than −0.45 MPa, much less the combination of these factors.

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Superabsorbent Polymers and Sanitary Sewage Change Water Availability During the Cowpea Emergence Phase

Cited by 2 publications

References 47 publications

Impacts on Soil and Cowpea Plants Fertigated with Sanitary Sewage through Subsurface Drip Irrigation

Impacts on Soil and Cowpea Plants Fertigated with Sanitary Sewage through Subsurface Drip Irrigation

Germination Performance of Physalis peruviana L. Seeds under Thermal and Water Stress Conditions

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