Seedling Growth of Tree Species Under Doses of Hydrogel and Two Levels of Luminosity

Filho, Roberto Albuquerque Pontes; Gondim, Franklin Aragão; Costa, Mírian Cristina Gomes

doi:10.1590/1806-90882018000100012

Cited by 9 publications

(8 citation statements)

References 20 publications

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“…Results similar to these were also observed as in the studies of Pontes Filho et al (2018), who during the analysis of the establishment of seedlings in Tamboril in two light levels and ten hydrogel dosages (ranging from 0.0 and 6.0 g L -1 ) found the above-ground dry weight to increase from the 2,0 g L -1 dosages under the sunlight and it was concluded that even though there was a response from the species to the hydrogel dosages, the benefits of polymers did not get so clear in the conditions that the study was carried out.…”

Section: Resultssupporting

confidence: 90%

Water Absorption by Hydrogel Using Fertilizers

Sobrinho¹,

Barbosa²

2020

ENRR

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It was sought, in this research, to evaluate the effects of fertilizer solutions on water retention by hydrogel as well as if the application methods and fertilizers affect water retention when the hydrogel is added to the soil. In laboratory works (experiment 1), the completely randomized design was used taking into account four treatments: distilled water; Urea (UR – 2.0 g L-1 ) and Magnesium Sulfate + Monoammonium Phosphate (MS + MAP – 2.0 g L-1  each). Regarding the experiment 2, considering soil columns, a 2x3x2 factorial was used, corresponding to two hydrogel application methods: dry and mixed to the soil or diluted in water and concentrated in the center of the column; three fertilizer solutions: distilled water, UR (2.0 g L-1 ) and MS + MAP (2.0 g L-1  each) with two cycles and three repetitions. An additional witness (hydrogel free) was also added. Total water volume absorbed by hydrogel, volume stored in the soil after each cycle, pH and electrical conductivity (EC) of leached solutions were all analyzed. The MS solution was the one who impacted the most the water absorption by the hydrogel, principally when the hydrogel was not present in the soil. The pH and EC of leached solutions evidenced the fertilizer solutions salinity.

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Section: Resultssupporting

confidence: 90%

Water Absorption by Hydrogel Using Fertilizers

Sobrinho¹,

Barbosa²

2020

ENRR

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“…A commercial potassium acrylate-based polymer (PONTES FILHO et al, 2018) was used. Dry granules of this polymer were diluted in 1 L of water, according to the doses of each treatment (4, 5, and 6 g L −1 ) and applied to the respective pits (20×20×20 cm).…”

Section: Design and Experiments Set Upmentioning

confidence: 99%

“…It is a superabsorbent polymer consisting of a slightly reticulate, three-dimensional polymeric network generally composed of ionic monomers with swelling capacity in the presence of water (SAHA et al, 2020). Some studies have reported the potential use of this polymer in agriculture and forestry (SAHA et al, 2020;PONTES FILHO et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Strategies That Favor Mycorrhization in the Reforestation of a Disturbed Area in the Semiarid Region

Costa

Vasconcelos

Filho

et al. 2021

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Hydrogel and mulch added to the soil may favor arbuscular mycorrhizal fungi (AMF), contributing to the reforestation of disturbed lands in semiarid regions. This study aimed to evaluate AMF colonization in the roots of Enterolobium contortisiliquum (Vell.) Morong in response to the application of hydrogel and mulch (bagana) from carnauba palm (Copernicia cerifera L.) to the soil and their effects in the soil and plants. A field experiment was set up in April 2014 in Ibaretama (Ceará, Brazil) in a randomized block design in a 2×4 factorial scheme – with mulch (+M) e without mulch (−M) × hydrogel doses (0, 4, 5, and 6 g L−1) –, with five replicates. Samples of roots, soil, and leaves were collected 18 months after the beginning of the experiment to determine AMF colonization in the roots and nutrient contents in the soil and plant material. The hydrogel dose of 6 g L−1 and mulch application equivalent to 10 Mg ha−1 increased AMF colonization by 21 e 44%, respectively. Soil contents of Ca, K, and Zn decreased with hydrogel doses without mulch but increased in the presence of the carnauba palm residue applied as mulch. A higher P content in the plant material was not associated with AMF colonization. The leaf content of Ca responded only to the treatment with mulch, reaching the highest value (3.8 g kg−1) in the absence of mulch.

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“…Polymers composed of polyacrylamide, called hydrogels, are available on the market [ 1 ] and are used as substrates to cultivate plants. This type of hydrogel is already widely used in planting and cultivation in agriculture and forestry [ 2 ], with the main objective of supplying water slowly to the roots of plants when water is scarce in the soil [ 3 , 4 ], thus meeting the water needs of plants in critical periods. According to Cock et al [ 5 ], hydrogels developed with biodegradable polymers such as starch, chitosan, and modified natural fibers, cross-linked with potassium acrylate and acrylamide, are an interesting novelty for plant development.…”

Section: Introductionmentioning

confidence: 99%

Copolymerized Natural Fibre from the Mesocarp of Orbignya phalerata (Babassu Fruit) as an Irrigating-Fertilizer for Growing Cactus Pears

et al. 2020

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Cactus pears face challenges due to global climate change, which is leading to in-depth research to monitor and increase their water activity. The objective of this study was to evaluate the use of the natural test hydrogel (TH) from Orbignya phalerata fibre as nutrients and water for growing cactus pear genotypes (“Baiana” and “Doce” [Nopalea cochenillifera], ‘Gigante’ [Opuntia fícus-indica], and “Mexican Elephant Ear” [Opuntia stricta]) compared to the use of commercial hydrogel (CH), which is based on polymers composed of polyacrylamide, and a treatment without the use of hydrogel (WH). A completely randomized design was used, in a factorial scheme (4 × 3), with four genotypes of cactus pear and three forms of hydration, with five replications. The number and area of cladode was greatest (p < 0.01) in plants with CH and TH irrigation-fertilization in the ‘Doce’ cactus genotype. The dry biomass of the cladode and root in the ‘Gigante’ cactus genotype was greatest (p < 0.01) in the treatments with CH and TH irrigation-fertilisation. The ‘Baiana’, ‘Doce’, and ‘Gigante’ cactus genotypes exhibited more (p < 0.01) dry matter content with the TH irrigation-fertilisation. The highest (p < 0.01) neutral detergent fibre content was observed in the ‘Baiana’ and ‘Doce’ cactus genotypes when irrigation occurred with WH treatment, and the highest acid detergent fibre content in the ‘Gigante’ genotype. The copolymerized natural fibre from the mesocarp of Orbignya phalerata (babassu fruit) induced a better growth and chemical composition of cactus pear genotypes than the hydrogel based on polymers composed of polyacrylamide.

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Seedling Growth of Tree Species Under Doses of Hydrogel and Two Levels of Luminosity

Cited by 9 publications

References 20 publications

Water Absorption by Hydrogel Using Fertilizers

Water Absorption by Hydrogel Using Fertilizers

Strategies That Favor Mycorrhization in the Reforestation of a Disturbed Area in the Semiarid Region

Copolymerized Natural Fibre from the Mesocarp of Orbignya phalerata (Babassu Fruit) as an Irrigating-Fertilizer for Growing Cactus Pears

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