Hidrogel como substituto da irrigação complementar em viveiro telado de mudas de cafeeiro

Marques, Patrícia Angélica Alves; Cripa, Marcos Antônio de Melo; Martinez, Eduardo Henrique

doi:10.1590/s0103-84782012005000129

Cited by 23 publications

(27 citation statements)

References 11 publications

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“…Para diminuir as perdas,é necessário o estudo de novas tecnologias visando melhorar a eficiência do nitrogênio na aveia. Neste contexto, surge como alternativa o uso de biopolímeros que possuem grande capacidade de retenção e armazenamento deágua, melhorando a eficiência de absorção de nutrientes [9]. Em café,é constatada a eficiência do polímero adicionado ao substrato cafeeiro, em que a altura e o peso seco das plantas aumentaram com a adição do biopolímero, alongando os intervalos entre irrigações [13].…”

Section: Resultsunclassified

“…Estas perdas podem ser decorrentes da lixiviação em anos chuvosos ou da volatização em anos secos, com diminuição da produtividade, aumento de custos e poluição ambiental [1,8]. Uma maneira de melhorar a absorção do nitrogênio pelas plantasé a manutenção da umidade no solo através do uso de biopolímeros [3,9]. O biopolímero hidrogelé um hidroabsorvente que pode atuar como uma alternativa a situações que envolvem longos períodos de estiagem ou reduzido armazenamento deágua pelo solo [13].…”

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Análise da Superfície de Resposta sobre o Uso do Biopolímero Hidrogel no Sistema Soja/Aveia

Kraisig¹,

Scremin²,

Mantai³

et al. 2018

Proceeding Series of the Brazilian Society of Computational and Applied Mathematics

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Section: Resultsunclassified

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Análise da Superfície de Resposta sobre o Uso do Biopolímero Hidrogel no Sistema Soja/Aveia

Kraisig¹,

Scremin²,

Mantai³

et al. 2018

Proceeding Series of the Brazilian Society of Computational and Applied Mathematics

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“…In agriculture, some works, such as Marques et al (2013), have suggested that the hydrogel may be an alternative to heavy irrigation. These authors evaluated the performance of seedlings of 'Iapar 59' coffee and concluded that the use of hydroplan-EB® polymer at a dose of 2 g per seedling bag, was very efficient.…”

Section: Resultsmentioning

confidence: 99%

“…When these polymers are hydrated, they turn into gel and can increase their own weight one hundred times more than their normal weight in water (AZEVEDO et al, 2002). Because of these characteristics, research has shown that hydrogels can promoted higher retention and gradual release of water through the soil, allowing more water availability to the plants (ZONTA et al, 2009;MARQUES et al, 2013;SANTOS et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…Marques et al (2013), studying the use of hydrogel as a substitute for irrigation of 'Iapar 59' coffeeseedlings, concluded that the use of hydroplan-EB® hydro absorbent, at a dose of 2 g per seedling, provided seedlings of the same quality as those which were irrigated. Demartelaere et al (2009) observed that the use of hydrogel polymer in Red Yellow Argisol reduced the amount of water used for irrigation of melon crops by 25 %.…”

Section: Introductionmentioning

confidence: 99%

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Synthetic Polymers on Water Retention and Pore Distribuition in a Clayey Latosol

Benevenute

Passos

Melo

et al. 2017

RSA

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Abstract:The use of polymers is increasing at the agricultural area, however their effects on soil porosity have been little studied. The objective of this article is to analyze the effects of applied synthetic polymers on soil porosity and water retention of a Dystroferric Red Latosol. This study was conducted on undisturbed samples collected at a depth of 0.05 m in a Latosol beneath native forest. The samples were saturated with distilled water and polymers HyC, HyA, HyB diluted in water according to use recommendations for coffee plantations. These samples were then submitted to matric potentials of -2, -4, -6 and -10 kPa in the suction units and -33, -100, -500 and -1500 kPa in a Richards extractor. The models were fitted and pore size distribution estimates calculated. The data were subjected to variance analysis and the averages were compared using the Scott-knott test to a level of 5 %. Decreasing of large pores volume than 145 µm, was detected with the application of polymers HyA and B. However the HyB polymer promoted a reduction in the pore volume in the intermediate classes (2.9-0.6; 0.6-0.2 µm), that are responsible for water availability to plants. On the other hand the HyC polymer promoted an increase in the soil water retention.Keywords: soil porosity; synthetic polymers; soil water availability.RESUMO: O uso de polímeros é crescente no meio agrícola, porém seus efeitos na porosidade do solo são pouco estudados. O presente trabalho teve como objetivo analisar os efeitos da aplicação de polímeros sintéticos na porosidade e retenção de água de um Latossolo Vermelho Distroférrico muito argiloso. O estudo foi realizado em amostras indeformadas coletadas na profundidade de 0,05 m, em um Latossolo sob mata nativa. Amostras foram saturadas com água destilada e com os polímeros HyC, HyA, HyB diluídos em água conforme recomendações de uso para cultura do cafeeiro. Em seguida estas amostras de solos foram submetidas a potenciais matriciais de -2, -4, -6 e -10 kPa nas unidades de sucção e -33, -100, -500 e -1500 kPa nas câmaras de Richards. Foi realizada a modelagem de curvas de retenção de água e calculada a distribuição de poros por tamanho. Os dados foram submetidos a análises de variância e as médias comparadas pelo teste de Scott-knott ao nível de 5 %. Houve uma redução do volume de poros da classe de tamanho > 145 µm quando o solo foi saturado com os polímeros HyA e HyB. O polímero HyB promoveu uma redução do volume de poros das classes intermediárias (2,9-0,6; 0,6-0,2 µm), responsáveis pela disponibilidade de água para as plantas. Já o polímero HyC promoveu o aumento da retenção de água no solo.Palavras-chave: porosidade do solo; polímeros sintéticos; disponibilidade de água no solo.

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Structuring of the epigeal fauna in restoration of Brazilian semiarid forest in the short term

Gomes¹,

Cabreira

Lima

et al. 2022

Soil Res.

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Context The Caatinga biome, located in the Brazilian semiarid region, has few remnants of riparian forest. Thus, it is essential to know the effectiveness of strategies aimed at forest recovery. Aims The objective of this study was to investigate the use of the epigeal fauna as a bioindicator tool of soil quality and ecosystem sustainability to determine the best native forest restoration strategy in the Caatinga in Belém do São Francisco, Pernambuco, Brazil. Methods In areas previously dominated by Prosopis juliflora (Sw.) DC., three treatments were installed: conventional planting of native species (P), planting of native species in islands (applied nucleation, N), and natural regeneration (NR). These restoration treatments were compared with an area of high P. juliflora dominance (PJ). Epigeal fauna were captured in two periods of the year (wet and dry seasons) using pitfall traps in a completely randomised design. We estimated the total abundance, richness, diversity, and evenness, as well as the trophic guilds of the epigeal fauna. Key results The epigeal fauna organisms were distributed in 22 taxonomic groups. The Saprophagous Diplopoda group was exclusive to PJ. The Predator Pseudocorpionida group was not observed in the NR area in any period. Cluster analysis revealed more dissimilarity of the NR with the other areas. Conclusions In the short term (less than 2 years), P increased the diversity and richness of the epigeal fauna and promoted better structuring of the Microphagous/Saprophagous (Entomobryomorpha, Poduromorpha, and Symphypleona) trophic guild, while NR promoted better structuring of the Herbivorous (Auchenorryhncha and Heteroptera) and Saprophagous/Predator (Formicidae and Coleoptera) trophic guilds. Implications In the short term, conventional planting benefited the epigeal fauna due to the high diversity of planted species.

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Hidrogel como substituto da irrigação complementar em viveiro telado de mudas de cafeeiro

Abstract: II Hidrogel como substituto da irrigação complementar em viveiro telado de mudas de cafeeiroHydrogel as a substitute for irrigation in screened seed nursery coffee

Cited by 23 publications

References 11 publications

Análise da Superfície de Resposta sobre o Uso do Biopolímero Hidrogel no Sistema Soja/Aveia

Análise da Superfície de Resposta sobre o Uso do Biopolímero Hidrogel no Sistema Soja/Aveia

Synthetic Polymers on Water Retention and Pore Distribuition in a Clayey Latosol

Structuring of the epigeal fauna in restoration of Brazilian semiarid forest in the short term

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