Hydrogels in Brazilian Agriculture

Neto, João Luiz Lopes Monteiro; Araújo, Wellington Farias; Chagas, Edvan Alves; Siqueira, Raphael Henrique da Silva; Oliveira, Gabriela Almeida; Rodríguez, Cristina Castillo

doi:10.18227/1982-8470ragro.v11i4.4130

Cited by 13 publications

(15 citation statements)

References 20 publications

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“…Hydroabsorbent polymers are preferentially indicated for regions with low water availability or long periods of drought, as has been occurring in recent years in the semi-arid regions of the Brazilian Northeast where the soil is low in moisture and reflects negatively on the growth and development of plants (Monteiro Neto et al, 2017). as a function of irrigation depth (A) and (C), for the substrate without and with hydrogel (B) and (D).…”

Section: Resultsmentioning

confidence: 99%

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Variation of Thermal Time, Phyllochron and Plastochron in Passion Fruit Plants With Irrigation Depth and Hydrogel

Cavalcante¹,

Cavalcante²,

Cavalcante³

et al. 2018

JAS

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The passion fruit demands water for its growth and production. Water management is relevant in regions characterized by low rainfall indices, such as semi-arid regions. In this direction, the use of hydrogel in the soil allows the water that is supplied through irrigation to be better utilized by the plants, reducing leach losses. The objective of this experiment was to evaluate the influence of hydrogel in soil cultivated with passion fruit and irrigated to various water depths on the thermal time of the phenological stages, phyllochron and plastochron of the plants. Treatments were distributed in randomized blocks in a 2 × 5 factorial arrangement, referring to the soil without and with hydrogel and raising the irrigation depth from 60% to 70%, 80%, 90% and 100% of crop evapotranspiration in four replications. The thermal requirements of the phenological phases and of the whole plant cycle, phyllochron of the main stem and the productive branches, and plastochron were evaluated. Increasing the irrigation depth from 60% to 100% reduced the total thermal time values from 3,811.8 to 2,401.3 °C day and from 3,707.8 to 2,628.7 °C day in the soil without and with hydrogel, respectively. The thermal time of the phenological phases and the phyllochron of the main stem and productive branches of the passion fruit were stimulated by an increase in irrigation depth.

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Section: Resultsmentioning

confidence: 99%

“…However, according to Monteiro Neto et al (2017), little has been demonstrated for the effects of water-borne polymers on development, or on the phenological and productive aspects of crops after the transplantation of seedlings in the field until the harvest of fruits.…”

Section: Introductionmentioning

confidence: 99%

Variation of Thermal Time, Phyllochron and Plastochron in Passion Fruit Plants With Irrigation Depth and Hydrogel

Cavalcante¹,

Cavalcante²,

Cavalcante³

et al. 2018

JAS

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“…As for the water availability, highly compromised during the low-rainfall months in the Savannah from Roraima, the agricultural hydrogels, soil conditioners that retain water and nutrients in quantities available to plants, can be an alternative during this period, as already reported in the obtaining of vigorous and productive stands of several cultivated species (Monteiro Neto et al, 2017).…”

Section: Introductionmentioning

confidence: 88%

“…Even though there are studies proving the efficiency of slowrelease fertilizers and hydrogels in the initial development of several agricultural species (Monteiro Neto et al, 2017;Cruz et al, 2018), it is stated that these products must be managed under optimal water conditions and in cultivations containing camu-camu plants of the adequate size. This is because plants below 25 cm of height are negatively affected by the SRF doses associated with the hydrogel use in conditions of low water availability.…”

Section: /11mentioning

confidence: 99%

Slow-release fertilizer and hydrogel on the initial growth of camu-camu under different water conditions in a Savannah soil

Neto¹,

Araújo²,

Chagas³

et al. 2020

Agraria

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During the process of adapting camu-camu on dry land, the fertilization management in local water conditions must be considered with tests of technologies available for cultivation. To that end, the objective was evaluating the effects of the fertilization with slow-release fertilizer (SRF) and hydrogel on the initial growth of camu-camu plants under different water conditions, in two consecutive experiments. In the first one, we evaluated the leaf mortality in two plant sizes (from 15 to 25 cm and from 35 to 45 cm), two hydrogel levels (presence and absence) and different hole fertilizations [A1-conventional fertilization-FC-(313 g of super simple + 37 g of urea + 41 g of KCl), A2 (357 g of SRF + 35 g of KCl), A3 (268 g SRF + 26 g of KCl), A4 (179 g SRF + 18 g of KCl) and A5 (89 g of SRF + 9 g of KCl)], under water deficit conditions. In the second experiment, the initial growth of larger plants was evaluated by using the same treatments for two years with water availability. Under water deficit, fertilizers A2 and A3, associated with hydrogel, were very damaging to the leaf growth, especially in plants with height values lesser than 25 cm. With water availability, using FC and A2 associated with hydrogel, and A4 and A5 in the hydrogel absence, favored the plant growth and the supply of chlorophyll 'b'. Applying SRF in adequate amounts is effective on the initial growth of camu-camu plants in the Savannah soil from Roraima.

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“…Ainda são incipientes ou inexistentes estudos sobre a interação entre doses de hidroretentor e água magnetizada em espécies arbóreas em fase de muda, principalmente em substratos comerciais, entretanto, é possível que os resultados observados sejam derivados das inúmeras alterações nas propriedades físico-químicas da água e do substrato (pH, condutividade elétrica, sais dissolvidos, desbalanço de nutrientes) e também nos fatores fisiológicos relacionados ao crescimento, como enzimas e hormônios [23,31,33,34,35], sendo assim, estudos mais específicos são necessários para inferir com mais propriedade sobre o resultados expostos.…”

Section: áGua Magnetizada áGua Normalunclassified

Crescimento e qualidade de mudas de baru em reposta a hidroretentor e água magnetizada

et al. 2020

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O baru (Dipteryx alata Vogel) é uma espécie nativa do Cerrado de usos múltiplos. O objetivo desse trabalho foi verificar a influência da associação entre doses de hidroretentor e tipos de água de irrigação no crescimento e na qualidade de mudas de baru. O delineamento experimental utilizado foi o de blocos ao acaso 5x2x5, com 5 repetições, sendo 5 doses de hidroretentor (0, 2, 4, 6, 8 g L-1 - DH), 2 águas de irrigação (normal - AN e magnetizada - AM) e 5 épocas de avaliação (15, 30, 45, 60, 75 e 90 dias após a emergência – DAE). A unidade experimental era composta de 4 mudas, cultivadas em substrato comercial sob tubetes de 120 cm³ de capacidade. O crescimento foi avaliado por características morfológicas (altura de planta- AP, diâmetro de caule - DC e número de folhas – NF, em intervalos quinzenais) e por produção de matéria seca (matérias secas de raiz, caule e folhas aos 90 DAE). As matérias secas foram usadas para estimar as razões de matéria seca. A qualidade foi determinada pelo Índice de Qualidade de Dickson (IQD). Observou-se que o crescimento em AF e NF foram limitados, enquanto que DC aumentou linearmente com o tempo. A associação entre DH e AM reduzem a AP, mas compensam no NF. A não diferença observada nas matérias secas, razões de matérias secas e IQD foram atribuídas à plasticidade fenotípica do baru. DH acima de 0,78 g L-1 não influenciam expressivamente no sistema radicular devido a limitação do tubete de 120 cm³.

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Hydrogels in Brazilian Agriculture

Cited by 13 publications

References 20 publications

Variation of Thermal Time, Phyllochron and Plastochron in Passion Fruit Plants With Irrigation Depth and Hydrogel

Variation of Thermal Time, Phyllochron and Plastochron in Passion Fruit Plants With Irrigation Depth and Hydrogel

Slow-release fertilizer and hydrogel on the initial growth of camu-camu under different water conditions in a Savannah soil

Crescimento e qualidade de mudas de baru em reposta a hidroretentor e água magnetizada

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